diff --git a/projects/gamilit/apps/backend/src/modules/admin/controllers/admin-alerts.controller.ts b/projects/gamilit/apps/backend/src/modules/admin/controllers/admin-alerts.controller.ts
index e33d3dd..998a6dc 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/controllers/admin-alerts.controller.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/controllers/admin-alerts.controller.ts
@@ -152,7 +152,7 @@ export class AdminAlertsController {
   @ApiResponse({ status: 403, description: 'Forbidden - Admin role required' })
   async createAlert(
     @Body() createDto: CreateAlertDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<AlertResponseDto> {
     const userId = req.user?.id || req.user?.sub;
     return this.alertsService.createAlert(createDto, userId);
@@ -184,7 +184,7 @@ export class AdminAlertsController {
   async acknowledgeAlert(
     @Param('id') id: string,
       @Body() dto: AcknowledgeAlertDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<AlertResponseDto> {
     const userId = req.user?.id || req.user?.sub;
     return this.alertsService.acknowledgeAlert(id, dto.acknowledgment_note, userId);
@@ -216,7 +216,7 @@ export class AdminAlertsController {
   async resolveAlert(
     @Param('id') id: string,
       @Body() dto: ResolveAlertDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<AlertResponseDto> {
     const userId = req.user?.id || req.user?.sub;
     return this.alertsService.resolveAlert(id, dto.resolution_note, userId);
diff --git a/projects/gamilit/apps/backend/src/modules/admin/controllers/admin-bulk-operations.controller.ts b/projects/gamilit/apps/backend/src/modules/admin/controllers/admin-bulk-operations.controller.ts
index 9c41099..b6faf99 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/controllers/admin-bulk-operations.controller.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/controllers/admin-bulk-operations.controller.ts
@@ -60,7 +60,7 @@ export class AdminBulkOperationsController {
   @ApiResponse({ status: 403, description: 'Forbidden - Admin access required' })
   async bulkSuspendUsers(
     @Body() dto: BulkSuspendUsersDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<BulkOperationStatusDto> {
     const adminId = req.user.sub; // JWT payload contiene sub = user.id
     return this.bulkOpsService.bulkSuspendUsers(dto, adminId);
@@ -82,7 +82,7 @@ export class AdminBulkOperationsController {
   })
   async bulkActivateUsers(
     @Body() dto: BulkActivateUsersDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<BulkOperationStatusDto> {
     const adminId = req.user.sub;
     return this.bulkOpsService.bulkActivateUsers(dto, adminId);
@@ -104,7 +104,7 @@ export class AdminBulkOperationsController {
   })
   async bulkUpdateRole(
     @Body() dto: BulkUpdateRoleDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<BulkOperationStatusDto> {
     const adminId = req.user.sub;
     return this.bulkOpsService.bulkUpdateRole(dto, adminId);
@@ -126,7 +126,7 @@ export class AdminBulkOperationsController {
   })
   async bulkDeleteUsers(
     @Body() dto: BulkDeleteUsersDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<BulkOperationStatusDto> {
     const adminId = req.user.sub;
     return this.bulkOpsService.bulkDeleteUsers(dto, adminId);
diff --git a/projects/gamilit/apps/backend/src/modules/admin/controllers/admin-content.controller.ts b/projects/gamilit/apps/backend/src/modules/admin/controllers/admin-content.controller.ts
index ec4dad2..a7680a0 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/controllers/admin-content.controller.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/controllers/admin-content.controller.ts
@@ -69,7 +69,7 @@ export class AdminContentController {
   async approveContent(
     @Param('id') id: string,
       @Body() approvalDto: ApproveContentDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<ContentDto> {
     const adminId = req.user?.id || req.user?.sub;
     return this.adminContentService.approveContent(
@@ -87,7 +87,7 @@ export class AdminContentController {
   async approveExercise(
     @Param('id') id: string,
       @Body() approvalDto: ApproveContentDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<ContentDto> {
     const adminId = req.user?.id || req.user?.sub;
     return this.adminContentService.approveContent(
@@ -106,7 +106,7 @@ export class AdminContentController {
   async rejectContent(
     @Param('id') id: string,
       @Body() rejectionDto: RejectContentDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<ContentDto> {
     const adminId = req.user?.id || req.user?.sub;
     return this.adminContentService.rejectContent(
@@ -124,7 +124,7 @@ export class AdminContentController {
   async rejectExercise(
     @Param('id') id: string,
       @Body() rejectionDto: RejectContentDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<ContentDto> {
     const adminId = req.user?.id || req.user?.sub;
     return this.adminContentService.rejectContent(
@@ -157,7 +157,7 @@ export class AdminContentController {
   })
   async createVersion(
     @Body() dto: CreateVersionDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<VersionResponseDto> {
     const adminId = req.user?.id || req.user?.sub;
     return this.adminContentService.createVersion(dto, adminId);
diff --git a/projects/gamilit/apps/backend/src/modules/admin/controllers/admin-gamification-config.controller.ts b/projects/gamilit/apps/backend/src/modules/admin/controllers/admin-gamification-config.controller.ts
index 9520de7..99b5bc2 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/controllers/admin-gamification-config.controller.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/controllers/admin-gamification-config.controller.ts
@@ -175,7 +175,7 @@ export class AdminGamificationConfigController {
   })
   async updateGamificationSettings(
     @Body() dto: UpdateGamificationSettingsDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<GamificationSettingsResponseDto> {
     const adminId = req.user.sub;
     return this.gamificationConfigService.updateGamificationSettings(
@@ -282,7 +282,7 @@ export class AdminGamificationConfigController {
     description: 'Forbidden - User is not an admin',
   })
   async restoreDefaults(
-    @Request() req: any,
+    @Request() req: AuthRequest,
   ): Promise<RestoreDefaultsResultDto> {
     const adminId = req.user.sub;
     return this.gamificationConfigService.restoreDefaults(adminId);
@@ -323,7 +323,7 @@ export class AdminGamificationConfigController {
     description: 'Forbidden - User is not an admin',
   })
   async restoreDefaultsAlternative(
-    @Request() req: any,
+    @Request() req: AuthRequest,
   ): Promise<RestoreDefaultsResultDto> {
     const adminId = req.user.sub;
     return this.gamificationConfigService.restoreDefaults(adminId);
@@ -503,7 +503,7 @@ export class AdminGamificationConfigController {
   async updateParameterById(
     @Param('id') id: string,
       @Body() dto: UpdateParameterDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<UpdateParameterResponseDto> {
     const adminId = req.user.sub;
     return this.gamificationConfigService.updateParameterById(
@@ -635,7 +635,7 @@ export class AdminGamificationConfigController {
   async updateMayaRank(
     @Param('rankName') rankName: string,
       @Body() dto: UpdateMayaRankDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<UpdateMayaRankResponseDto> {
     const adminId = req.user.sub;
     return this.gamificationConfigService.updateMayaRank(
diff --git a/projects/gamilit/apps/backend/src/modules/admin/controllers/admin-interventions.controller.ts b/projects/gamilit/apps/backend/src/modules/admin/controllers/admin-interventions.controller.ts
index c257421..df0a3c4 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/controllers/admin-interventions.controller.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/controllers/admin-interventions.controller.ts
@@ -163,7 +163,7 @@ export class AdminInterventionsController {
   async acknowledgeIntervention(
     @Param('id') id: string,
       @Body() dto: AcknowledgeInterventionDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<InterventionAlertDto> {
     const userId = req.user?.id || req.user?.sub;
     return this.interventionsService.acknowledgeIntervention(id, dto.acknowledgment_note, userId);
@@ -211,7 +211,7 @@ export class AdminInterventionsController {
   async resolveIntervention(
     @Param('id') id: string,
       @Body() dto: ResolveInterventionDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<InterventionAlertDto> {
     const userId = req.user?.id || req.user?.sub;
     return this.interventionsService.resolveIntervention(id, dto.resolution_notes, userId);
diff --git a/projects/gamilit/apps/backend/src/modules/admin/controllers/admin-reports.controller.ts b/projects/gamilit/apps/backend/src/modules/admin/controllers/admin-reports.controller.ts
index 60ea5ce..abc535f 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/controllers/admin-reports.controller.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/controllers/admin-reports.controller.ts
@@ -37,7 +37,7 @@ export class AdminReportsController {
   })
   async generateReport(
     @Body() generateDto: GenerateReportDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<ReportDto> {
     const userId = req.user?.id || req.user?.sub;
     return this.adminReportsService.generateReport(generateDto, userId);
diff --git a/projects/gamilit/apps/backend/src/modules/admin/controllers/admin-system.controller.ts b/projects/gamilit/apps/backend/src/modules/admin/controllers/admin-system.controller.ts
index 04a8648..6cc2560 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/controllers/admin-system.controller.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/controllers/admin-system.controller.ts
@@ -71,7 +71,7 @@ export class AdminSystemController {
   })
   async updateSystemConfig(
     @Body() configDto: UpdateSystemConfigDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<SystemConfigDto> {
     const adminId = req.user?.id || req.user?.sub;
     return this.adminSystemService.updateSystemConfig(configDto, adminId);
@@ -94,7 +94,7 @@ export class AdminSystemController {
   })
   async getConfigByCategory(
     @Param('category') category: string,
-  ): Promise<Record<string, any>> {
+  ): Promise<Record<string, unknown>> {
     return this.adminSystemService.getConfigByCategory(category);
   }
 
@@ -106,9 +106,9 @@ export class AdminSystemController {
   })
   async updateConfigByCategory(
     @Param('category') category: string,
-      @Body() configDto: Record<string, any>,
-      @Request() req: any,
-  ): Promise<Record<string, any>> {
+      @Body() configDto: Record<string, unknown>,
+      @Request() req: AuthRequest,
+  ): Promise<Record<string, unknown>> {
     const adminId = req.user?.id || req.user?.sub;
     return this.adminSystemService.updateConfigByCategory(
       category,
@@ -125,7 +125,7 @@ export class AdminSystemController {
   })
   async toggleMaintenance(
     @Body() toggleDto: ToggleMaintenanceDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<MaintenanceStatusDto> {
     const adminId = req.user?.id || req.user?.sub;
     return this.adminSystemService.toggleMaintenance(
diff --git a/projects/gamilit/apps/backend/src/modules/admin/controllers/admin-users.controller.ts b/projects/gamilit/apps/backend/src/modules/admin/controllers/admin-users.controller.ts
index edaff0d..d89f952 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/controllers/admin-users.controller.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/controllers/admin-users.controller.ts
@@ -137,7 +137,7 @@ export class AdminUsersController {
   })
   async bulkSuspend(
     @Body() dto: BulkSuspendUsersDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<BulkOperationStatusDto> {
     const adminId = req.user?.id || req.user?.sub;
     return this.bulkOpsService.bulkSuspendUsers(dto, adminId);
@@ -151,7 +151,7 @@ export class AdminUsersController {
   })
   async bulkDelete(
     @Body() dto: BulkDeleteUsersDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<BulkOperationStatusDto> {
     const adminId = req.user?.id || req.user?.sub;
     return this.bulkOpsService.bulkDeleteUsers(dto, adminId);
@@ -165,7 +165,7 @@ export class AdminUsersController {
   })
   async bulkUpdateRole(
     @Body() dto: BulkUpdateRoleDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<BulkOperationStatusDto> {
     const adminId = req.user?.id || req.user?.sub;
     return this.bulkOpsService.bulkUpdateRole(dto, adminId);
diff --git a/projects/gamilit/apps/backend/src/modules/admin/controllers/feature-flags.controller.ts b/projects/gamilit/apps/backend/src/modules/admin/controllers/feature-flags.controller.ts
index 0898df8..d32674e 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/controllers/feature-flags.controller.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/controllers/feature-flags.controller.ts
@@ -114,7 +114,7 @@ export class FeatureFlagsController {
   })
   async create(
     @Body() dto: CreateFeatureFlagDto,
-    @Request() req: any,
+    @Request() req: AuthRequest,
   ): Promise<FeatureFlag> {
     const adminId = req.user?.id || req.user?.sub;
     return this.featureFlagsService.create(dto, adminId);
@@ -140,7 +140,7 @@ export class FeatureFlagsController {
   async update(
     @Param('key') key: string,
     @Body() dto: UpdateFeatureFlagDto,
-    @Request() req: any,
+    @Request() req: AuthRequest,
   ): Promise<FeatureFlag> {
     const adminId = req.user?.id || req.user?.sub;
     return this.featureFlagsService.update(key, dto, adminId);
@@ -161,7 +161,7 @@ export class FeatureFlagsController {
   })
   async enable(
     @Param('key') key: string,
-    @Request() req: any,
+    @Request() req: AuthRequest,
   ): Promise<FeatureFlag> {
     const adminId = req.user?.id || req.user?.sub;
     return this.featureFlagsService.enable(key, adminId);
@@ -182,7 +182,7 @@ export class FeatureFlagsController {
   })
   async disable(
     @Param('key') key: string,
-    @Request() req: any,
+    @Request() req: AuthRequest,
   ): Promise<FeatureFlag> {
     const adminId = req.user?.id || req.user?.sub;
     return this.featureFlagsService.disable(key, adminId);
@@ -204,7 +204,7 @@ export class FeatureFlagsController {
   async updateRollout(
     @Param('key') key: string,
     @Body('percentage') percentage: number,
-    @Request() req: any,
+    @Request() req: AuthRequest,
   ): Promise<FeatureFlag> {
     const adminId = req.user?.id || req.user?.sub;
     return this.featureFlagsService.updateRollout(key, percentage, adminId);
diff --git a/projects/gamilit/apps/backend/src/modules/admin/dto/alerts/alert-response.dto.ts b/projects/gamilit/apps/backend/src/modules/admin/dto/alerts/alert-response.dto.ts
index 2348a40..5aac976 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/dto/alerts/alert-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/dto/alerts/alert-response.dto.ts
@@ -75,10 +75,10 @@ export class AlertResponseDto {
     suppress_similar!: boolean;
 
   @ApiPropertyOptional({ description: 'Additional context data' })
-    context_data?: Record<string, any>;
+    context_data?: Record<string, unknown>;
 
   @ApiPropertyOptional({ description: 'Metrics data' })
-    metrics?: Record<string, any>;
+    metrics?: Record<string, unknown>;
 
   @ApiPropertyOptional({ description: 'Related alert IDs', type: [String] })
     related_alerts?: string[];
diff --git a/projects/gamilit/apps/backend/src/modules/admin/dto/alerts/create-alert.dto.ts b/projects/gamilit/apps/backend/src/modules/admin/dto/alerts/create-alert.dto.ts
index 5154e5b..7d0e618 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/dto/alerts/create-alert.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/dto/alerts/create-alert.dto.ts
@@ -45,10 +45,10 @@ export class CreateAlertDto {
   @ApiPropertyOptional({ description: 'Additional context data (JSON)' })
   @IsOptional()
   @IsObject()
-    context_data?: Record<string, any>;
+    context_data?: Record<string, unknown>;
 
   @ApiPropertyOptional({ description: 'Metrics data (JSON)' })
   @IsOptional()
   @IsObject()
-    metrics?: Record<string, any>;
+    metrics?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/admin/dto/content/content.dto.ts b/projects/gamilit/apps/backend/src/modules/admin/dto/content/content.dto.ts
index f7ab35a..85326ac 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/dto/content/content.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/dto/content/content.dto.ts
@@ -61,5 +61,5 @@ export class ContentDto {
 
   @ApiPropertyOptional({ description: 'Additional metadata' })
   @Expose()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/admin/dto/content/version-response.dto.ts b/projects/gamilit/apps/backend/src/modules/admin/dto/content/version-response.dto.ts
index 3aeac0f..d6e221d 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/dto/content/version-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/dto/content/version-response.dto.ts
@@ -65,5 +65,5 @@ export class VersionResponseDto {
       is_published: true,
     },
   })
-    snapshot!: Record<string, any>;
+    snapshot!: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/admin/dto/dashboard/recent-activity.dto.ts b/projects/gamilit/apps/backend/src/modules/admin/dto/dashboard/recent-activity.dto.ts
index 09aa23b..ba9dcdd 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/dto/dashboard/recent-activity.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/dto/dashboard/recent-activity.dto.ts
@@ -48,7 +48,7 @@ export class AdminActionDto {
   @ApiPropertyOptional({
     description: 'Additional metadata in JSON format',
   })
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 
   @ApiProperty({
     description: 'Timestamp when the action occurred',
diff --git a/projects/gamilit/apps/backend/src/modules/admin/dto/feature-flags/create-feature-flag.dto.ts b/projects/gamilit/apps/backend/src/modules/admin/dto/feature-flags/create-feature-flag.dto.ts
index ac54e3d..0134f74 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/dto/feature-flags/create-feature-flag.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/dto/feature-flags/create-feature-flag.dto.ts
@@ -88,7 +88,7 @@ export class CreateFeatureFlagDto {
   })
   @IsObject()
   @IsOptional()
-    targetConditions?: Record<string, any>;
+    targetConditions?: Record<string, unknown>;
 
   @ApiProperty({
     description: 'Categoría de la feature flag',
@@ -106,5 +106,5 @@ export class CreateFeatureFlagDto {
   })
   @IsObject()
   @IsOptional()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/admin/dto/gamification-config/gamification-settings-response.dto.ts b/projects/gamilit/apps/backend/src/modules/admin/dto/gamification-config/gamification-settings-response.dto.ts
index 42eccc1..ecca572 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/dto/gamification-config/gamification-settings-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/dto/gamification-config/gamification-settings-response.dto.ts
@@ -15,7 +15,7 @@ export class GamificationSettingsResponseDto {
       perfect_score_bonus: 2.0,
     },
   })
-    xp!: Record<string, any>;
+    xp!: Record<string, unknown>;
 
   @ApiProperty({
     description: 'Rank thresholds',
@@ -27,7 +27,7 @@ export class GamificationSettingsResponseDto {
       expert: 5000,
     },
   })
-    ranks!: Record<string, any>;
+    ranks!: Record<string, unknown>;
 
   @ApiProperty({
     description: 'ML Coins rewards',
@@ -37,13 +37,13 @@ export class GamificationSettingsResponseDto {
       exercise_completion_reward: 100,
     },
   })
-    coins!: Record<string, any>;
+    coins!: Record<string, unknown>;
 
   @ApiPropertyOptional({
     description: 'Achievement criteria',
     example: { criteria: [] },
   })
-    achievements?: Record<string, any>;
+    achievements?: Record<string, unknown>;
 
   @ApiProperty({
     description: 'Default values from system',
@@ -52,7 +52,7 @@ export class GamificationSettingsResponseDto {
       'gamification.xp.completion_multiplier': 1.5,
     },
   })
-    defaults!: Record<string, any>;
+    defaults!: Record<string, unknown>;
 
   @ApiProperty({
     description: 'Timestamp of last update',
diff --git a/projects/gamilit/apps/backend/src/modules/admin/dto/gamification-config/parameter-response.dto.ts b/projects/gamilit/apps/backend/src/modules/admin/dto/gamification-config/parameter-response.dto.ts
index 79225c2..eae563d 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/dto/gamification-config/parameter-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/dto/gamification-config/parameter-response.dto.ts
@@ -109,13 +109,13 @@ export class ParameterResponseDto {
     description: 'Validation rules in JSON format',
     example: { regex: '^[0-9]+$' },
   })
-    validation_rules?: Record<string, any>;
+    validation_rules?: Record<string, unknown>;
 
   @ApiPropertyOptional({
     description: 'Additional metadata',
     example: { unit: 'points', category_order: 1 },
   })
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 
   @ApiProperty({
     description: 'Timestamp when parameter was created',
diff --git a/projects/gamilit/apps/backend/src/modules/admin/dto/gamification-config/update-gamification-settings.dto.ts b/projects/gamilit/apps/backend/src/modules/admin/dto/gamification-config/update-gamification-settings.dto.ts
index 74deda2..69ed658 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/dto/gamification-config/update-gamification-settings.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/dto/gamification-config/update-gamification-settings.dto.ts
@@ -182,5 +182,5 @@ export class UpdateGamificationSettingsDto {
   })
   @IsOptional()
   @IsObject()
-    achievements?: Record<string, any>;
+    achievements?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/admin/dto/interventions/intervention-alert.dto.ts b/projects/gamilit/apps/backend/src/modules/admin/dto/interventions/intervention-alert.dto.ts
index cf987a7..a15f990 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/dto/interventions/intervention-alert.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/dto/interventions/intervention-alert.dto.ts
@@ -80,7 +80,7 @@ export class InterventionAlertDto {
     description: 'Additional metrics and context data',
     example: { average_score: 45, exercises_failed: 3 },
   })
-    metrics?: Record<string, any>;
+    metrics?: Record<string, unknown>;
 
   @ApiProperty({
     enum: InterventionStatus,
diff --git a/projects/gamilit/apps/backend/src/modules/admin/dto/monitoring/recent-errors.dto.ts b/projects/gamilit/apps/backend/src/modules/admin/dto/monitoring/recent-errors.dto.ts
index 1104855..2981d08 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/dto/monitoring/recent-errors.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/dto/monitoring/recent-errors.dto.ts
@@ -58,7 +58,7 @@ export class RecentErrorDto {
     nullable: true,
     example: { stack: '...', code: 'ECONNREFUSED' },
   })
-    context!: Record<string, any> | null;
+    context!: Record<string, unknown> | null;
 
   @ApiProperty({
     description: 'Source of the error',
diff --git a/projects/gamilit/apps/backend/src/modules/admin/dto/organizations/create-organization.dto.ts b/projects/gamilit/apps/backend/src/modules/admin/dto/organizations/create-organization.dto.ts
index d92b83f..042af32 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/dto/organizations/create-organization.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/dto/organizations/create-organization.dto.ts
@@ -91,7 +91,7 @@ export class CreateOrganizationDto {
   })
   @IsOptional()
   @IsObject()
-    settings?: Record<string, any>;
+    settings?: Record<string, unknown>;
 
   @ApiPropertyOptional({
     description: 'Organization metadata (JSONB)',
@@ -99,5 +99,5 @@ export class CreateOrganizationDto {
   })
   @IsOptional()
   @IsObject()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/admin/dto/organizations/organization.dto.ts b/projects/gamilit/apps/backend/src/modules/admin/dto/organizations/organization.dto.ts
index e2d20c8..b8e8d28 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/dto/organizations/organization.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/dto/organizations/organization.dto.ts
@@ -49,11 +49,11 @@ export class OrganizationDto {
 
   @ApiProperty({ description: 'Organization settings', example: { theme: 'detective' } })
   @Expose()
-    settings!: Record<string, any>;
+    settings!: Record<string, unknown>;
 
   @ApiProperty({ description: 'Organization metadata', example: { notes: '...' } })
   @Expose()
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   @ApiProperty({ description: 'Creation date', example: '2025-01-15T10:00:00Z' })
   @Expose()
diff --git a/projects/gamilit/apps/backend/src/modules/admin/dto/organizations/update-organization.dto.ts b/projects/gamilit/apps/backend/src/modules/admin/dto/organizations/update-organization.dto.ts
index 72d07a5..80f1d77 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/dto/organizations/update-organization.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/dto/organizations/update-organization.dto.ts
@@ -83,7 +83,7 @@ export class UpdateOrganizationDto {
   })
   @IsOptional()
   @IsObject()
-    settings?: Record<string, any>;
+    settings?: Record<string, unknown>;
 
   @ApiPropertyOptional({
     description: 'Organization metadata (JSONB)',
@@ -91,5 +91,5 @@ export class UpdateOrganizationDto {
   })
   @IsOptional()
   @IsObject()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/admin/dto/reports/report.dto.ts b/projects/gamilit/apps/backend/src/modules/admin/dto/reports/report.dto.ts
index 2a9474a..1ba1722 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/dto/reports/report.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/dto/reports/report.dto.ts
@@ -48,7 +48,7 @@ export class ReportDto {
   @ApiPropertyOptional({
     description: 'Report metadata',
   })
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 
   @ApiProperty({
     description: 'Report creation timestamp',
diff --git a/projects/gamilit/apps/backend/src/modules/admin/dto/system/maintenance-operations.dto.ts b/projects/gamilit/apps/backend/src/modules/admin/dto/system/maintenance-operations.dto.ts
index 9c16b6c..abb2c63 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/dto/system/maintenance-operations.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/dto/system/maintenance-operations.dto.ts
@@ -60,7 +60,7 @@ export class MaintenanceOperationResultDto {
     description: 'Additional metadata about the operation',
     example: { execution_time_ms: 1523 },
   })
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 }
 
 /**
diff --git a/projects/gamilit/apps/backend/src/modules/admin/dto/system/system-config.dto.ts b/projects/gamilit/apps/backend/src/modules/admin/dto/system/system-config.dto.ts
index 52c43d5..ded1d4f 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/dto/system/system-config.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/dto/system/system-config.dto.ts
@@ -20,7 +20,7 @@ export class SystemConfigDto {
     session_timeout_minutes!: number;
 
   @ApiPropertyOptional({ description: 'Custom settings' })
-    custom_settings?: Record<string, any>;
+    custom_settings?: Record<string, unknown>;
 
   @ApiProperty({ description: 'Last updated timestamp', example: '2025-11-02T18:00:00Z' })
     updated_at!: string;
diff --git a/projects/gamilit/apps/backend/src/modules/admin/dto/system/update-system-config.dto.ts b/projects/gamilit/apps/backend/src/modules/admin/dto/system/update-system-config.dto.ts
index d5029c0..432d9d6 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/dto/system/update-system-config.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/dto/system/update-system-config.dto.ts
@@ -61,5 +61,5 @@ export class UpdateSystemConfigDto {
   })
   @IsOptional()
   @IsObject()
-    custom_settings?: Record<string, any>;
+    custom_settings?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/admin/dto/users/update-user.dto.ts b/projects/gamilit/apps/backend/src/modules/admin/dto/users/update-user.dto.ts
index b13b077..31e267c 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/dto/users/update-user.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/dto/users/update-user.dto.ts
@@ -24,5 +24,5 @@ export class UpdateUserDto {
 
   @IsOptional()
   @IsObject()
-    raw_user_meta_data?: Record<string, any>;
+    raw_user_meta_data?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/admin/dto/users/user-details.dto.ts b/projects/gamilit/apps/backend/src/modules/admin/dto/users/user-details.dto.ts
index 1641093..3f6894f 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/dto/users/user-details.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/dto/users/user-details.dto.ts
@@ -39,7 +39,7 @@ export class UserDetailsDto {
     last_sign_in_at?: Date;
 
   @Expose()
-    raw_user_meta_data!: Record<string, any>;
+    raw_user_meta_data!: Record<string, unknown>;
 
   @Expose()
     created_at!: Date;
diff --git a/projects/gamilit/apps/backend/src/modules/admin/entities/admin-report.entity.ts b/projects/gamilit/apps/backend/src/modules/admin/entities/admin-report.entity.ts
index 8458e5d..17ccea0 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/entities/admin-report.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/entities/admin-report.entity.ts
@@ -88,7 +88,7 @@ export class AdminReport {
    * Formato: { startDate: '2025-01-01', endDate: '2025-12-31', classroomId: 'abc', ... }
    */
   @Column({ type: 'jsonb', default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   /**
    * Mensaje de error si la generación falla
diff --git a/projects/gamilit/apps/backend/src/modules/admin/entities/feature-flag.entity.ts b/projects/gamilit/apps/backend/src/modules/admin/entities/feature-flag.entity.ts
index fd80fd1..1754331 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/entities/feature-flag.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/entities/feature-flag.entity.ts
@@ -101,7 +101,7 @@ export class FeatureFlag {
    * @example { "min_level": 5, "schools": ["uuid1", "uuid2"] }
    */
   @Column({ type: 'jsonb', default: {} })
-    target_conditions!: Record<string, any>;
+    target_conditions!: Record<string, unknown>;
 
   /**
    * Fecha y hora de inicio de la feature
@@ -122,7 +122,7 @@ export class FeatureFlag {
    * @example { "ab_test_group": "A", "tracking_id": "GA-123" }
    */
   @Column({ type: 'jsonb', default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   /**
    * ID del usuario que creó la feature flag
diff --git a/projects/gamilit/apps/backend/src/modules/admin/entities/notification-settings.entity.ts b/projects/gamilit/apps/backend/src/modules/admin/entities/notification-settings.entity.ts
index 23e371c..31f50b2 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/entities/notification-settings.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/entities/notification-settings.entity.ts
@@ -121,20 +121,20 @@ export class NotificationSettings {
    * @example { "max_retries": 3, "backoff": "exponential" }
    */
   @Column({ type: 'jsonb', default: {} })
-    retry_policy!: Record<string, any>;
+    retry_policy!: Record<string, unknown>;
 
   /**
    * Configuraciones específicas del canal de entrega
    * @example { "email_format": "html", "reply_to": "support@example.com" }
    */
   @Column({ type: 'jsonb', default: {} })
-    delivery_settings!: Record<string, any>;
+    delivery_settings!: Record<string, unknown>;
 
   /**
    * Metadatos adicionales
    */
   @Column({ type: 'jsonb', default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   /**
    * ID del usuario que creó el setting
diff --git a/projects/gamilit/apps/backend/src/modules/admin/entities/system-alert.entity.ts b/projects/gamilit/apps/backend/src/modules/admin/entities/system-alert.entity.ts
index b860887..66e1e2e 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/entities/system-alert.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/entities/system-alert.entity.ts
@@ -176,14 +176,14 @@ export class SystemAlert {
    * @example { "endpoint": "/api/users", "statusCode": 500, "requestId": "abc123" }
    */
   @Column({ type: 'jsonb', default: {} })
-    context_data!: Record<string, any>;
+    context_data!: Record<string, unknown>;
 
   /**
    * Métricas asociadas en formato JSONB
    * @example { "responseTime": 5000, "errorRate": 0.15, "cpuUsage": 0.95 }
    */
   @Column({ type: 'jsonb', default: {} })
-    metrics!: Record<string, any>;
+    metrics!: Record<string, unknown>;
 
   /**
    * Array de IDs de alertas relacionadas
diff --git a/projects/gamilit/apps/backend/src/modules/admin/entities/system-setting.entity.ts b/projects/gamilit/apps/backend/src/modules/admin/entities/system-setting.entity.ts
index ff86d6f..a7c6c9f 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/entities/system-setting.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/entities/system-setting.entity.ts
@@ -133,7 +133,7 @@ export class SystemSetting {
    * @example { "regex": "^[a-z]+$", "minLength": 3 }
    */
   @Column({ type: 'jsonb', default: {} })
-    validation_rules!: Record<string, any>;
+    validation_rules!: Record<string, unknown>;
 
   /**
    * Valores permitidos para el setting (array de strings)
@@ -158,7 +158,7 @@ export class SystemSetting {
    * Metadatos adicionales en formato JSONB
    */
   @Column({ type: 'jsonb', default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   /**
    * ID del usuario que creó el setting
diff --git a/projects/gamilit/apps/backend/src/modules/admin/services/admin-alerts.service.ts b/projects/gamilit/apps/backend/src/modules/admin/services/admin-alerts.service.ts
index ddf20f4..3881e89 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/services/admin-alerts.service.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/services/admin-alerts.service.ts
@@ -194,7 +194,7 @@ export class AdminAlertsService {
    * @param userId - ID del usuario que crea la alerta (para auditoría)
    * @returns Alerta creada
    */
-  async createAlert(createDto: CreateAlertDto: string): Promise<AlertResponseDto> {
+  async createAlert(createDto: CreateAlertDto, _userId: string): Promise<AlertResponseDto> {
     const alert = this.alertRepo.create({
       alert_type: createDto.alert_type,
       severity: createDto.severity,
diff --git a/projects/gamilit/apps/backend/src/modules/admin/services/admin-content.service.ts b/projects/gamilit/apps/backend/src/modules/admin/services/admin-content.service.ts
index ce5f34f..ef80182 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/services/admin-content.service.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/services/admin-content.service.ts
@@ -577,7 +577,7 @@ export class AdminContentService {
   private createSnapshot(
     content: any,
     content_type: string,
-  ): Record<string, any> {
+  ): Record<string, unknown> {
     switch (content_type) {
       case 'module':
         return {
@@ -804,7 +804,7 @@ export class AdminContentService {
             });
             content_title = template?.name;
           }
-        } catch (_error) {
+        } catch {
           // Content might have been deleted, just leave title as undefined
           content_title = undefined;
         }
diff --git a/projects/gamilit/apps/backend/src/modules/admin/services/admin-system.service.ts b/projects/gamilit/apps/backend/src/modules/admin/services/admin-system.service.ts
index 3ceb6d3..ea89776 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/services/admin-system.service.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/services/admin-system.service.ts
@@ -279,7 +279,7 @@ export class AdminSystemService {
     adminId: string,
   ): Promise<SystemConfigDto> {
     // Update settings in database
-    const settingsToUpdate: Record<string, any> = {
+    const settingsToUpdate: Record<string, unknown> = {
       maintenance_mode: updateDto.maintenance_mode,
       maintenance_message: updateDto.maintenance_message,
       allow_registrations: updateDto.allow_registrations,
@@ -360,7 +360,7 @@ export class AdminSystemService {
   /**
    * Get system configuration by category
    */
-  async getConfigByCategory(category: string): Promise<Record<string, any>> {
+  async getConfigByCategory(category: string): Promise<Record<string, unknown>> {
     // Validate category
     const validCategories = ['general', 'email', 'notifications', 'security', 'maintenance'];
     if (!validCategories.includes(category)) {
@@ -387,7 +387,7 @@ export class AdminSystemService {
     });
 
     // Build config object for this category
-    const config: Record<string, any> = {};
+    const config: Record<string, unknown> = {};
     settings.forEach((setting) => {
       config[setting.setting_key] = this.parseValue(setting);
     });
@@ -400,9 +400,9 @@ export class AdminSystemService {
    */
   async updateConfigByCategory(
     category: string,
-    configDto: Record<string, any>,
+    configDto: Record<string, unknown>,
     adminId: string,
-  ): Promise<Record<string, any>> {
+  ): Promise<Record<string, unknown>> {
     // Validate category
     const validCategories = ['general', 'email', 'notifications', 'security', 'maintenance'];
     if (!validCategories.includes(category)) {
@@ -744,7 +744,8 @@ export class AdminSystemService {
         pool_size: poolSize,
         active_connections: activeConnections,
       };
-    } catch () {
+      // eslint-disable-next-line @typescript-eslint/no-unused-vars
+    } catch (_error) {
       return {
         status: 'down',
         response_time_ms: -1,
diff --git a/projects/gamilit/apps/backend/src/modules/admin/services/gamification-config.service.ts b/projects/gamilit/apps/backend/src/modules/admin/services/gamification-config.service.ts
index 419ac48..f7575e5 100644
--- a/projects/gamilit/apps/backend/src/modules/admin/services/gamification-config.service.ts
+++ b/projects/gamilit/apps/backend/src/modules/admin/services/gamification-config.service.ts
@@ -425,8 +425,8 @@ export class GamificationConfigService {
    * Parse settings array into structured config
    * @private
    */
-  private parseSettings(settings: SystemSetting[]): Record<string, any> {
-    const config: Record<string, any> = {
+  private parseSettings(settings: SystemSetting[]): Record<string, unknown> {
+    const config: Record<string, unknown> = {
       xp: {},
       ranks: {},
       coins: {},
@@ -446,7 +446,7 @@ export class GamificationConfigService {
       } else if (setting.value_type === 'json') {
         try {
           value = JSON.parse(value);
-        } catch (_error) {
+        } catch {
           this.logger.warn(`Failed to parse JSON for ${setting.setting_key}`);
           value = {};
         }
@@ -471,8 +471,8 @@ export class GamificationConfigService {
    * Parse default values from settings
    * @private
    */
-  private parseDefaults(settings: SystemSetting[]): Record<string, any> {
-    const defaults: Record<string, any> = {};
+  private parseDefaults(settings: SystemSetting[]): Record<string, unknown> {
+    const defaults: Record<string, unknown> = {};
 
     for (const setting of settings) {
       if (setting.default_value) {
@@ -484,7 +484,7 @@ export class GamificationConfigService {
         } else if (setting.value_type === 'json') {
           try {
             value = JSON.parse(value);
-          } catch (_error) {
+          } catch {
             this.logger.warn(
               `Failed to parse default JSON for ${setting.setting_key}`,
             );
@@ -542,7 +542,7 @@ export class GamificationConfigService {
    * @private
    */
   private async updateXpSettings(
-    xp: Record<string, any>,
+    xp: Record<string, unknown>,
     adminId: string,
   ): Promise<void> {
     for (const [key, value] of Object.entries(xp)) {
@@ -556,7 +556,7 @@ export class GamificationConfigService {
    * @private
    */
   private async updateRankSettings(
-    ranks: Record<string, any>,
+    ranks: Record<string, unknown>,
     adminId: string,
   ): Promise<void> {
     const settingKey = 'gamification.ranks.thresholds';
@@ -568,7 +568,7 @@ export class GamificationConfigService {
    * @private
    */
   private async updateCoinsSettings(
-    coins: Record<string, any>,
+    coins: Record<string, unknown>,
     adminId: string,
   ): Promise<void> {
     for (const [key, value] of Object.entries(coins)) {
@@ -582,7 +582,7 @@ export class GamificationConfigService {
    * @private
    */
   private async updateAchievementSettings(
-    achievements: Record<string, any>,
+    achievements: Record<string, unknown>,
     adminId: string,
   ): Promise<void> {
     const settingKey = 'gamification.achievements.criteria';
@@ -992,7 +992,7 @@ export class GamificationConfigService {
     if (parameter.value_type === 'json') {
       try {
         JSON.parse(value);
-      } catch (_error) {
+      } catch {
         throw new BadRequestException(
           `Invalid JSON value for ${parameter.setting_key}`,
         );
diff --git a/projects/gamilit/apps/backend/src/modules/assignments/controllers/assignments.controller.ts b/projects/gamilit/apps/backend/src/modules/assignments/controllers/assignments.controller.ts
index c36e8bd..fee2a14 100644
--- a/projects/gamilit/apps/backend/src/modules/assignments/controllers/assignments.controller.ts
+++ b/projects/gamilit/apps/backend/src/modules/assignments/controllers/assignments.controller.ts
@@ -69,7 +69,7 @@ export class AssignmentsController {
     },
   })
   @ApiResponse({ status: 400, description: 'Datos inválidos' })
-  async create(@Body() createDto: CreateAssignmentDto, @Request() req: any) {
+  async create(@Body() createDto: CreateAssignmentDto, @Request() req: AuthRequest) {
     const teacherId = req.user?.userId || req.user?.sub;
     return this.assignmentsService.create(createDto, teacherId);
   }
@@ -116,7 +116,7 @@ export class AssignmentsController {
       }],
     },
   })
-  async findAll(@Query() query: any, @Request() req: any) {
+  async findAll(@Query() query: any, @Request() req: AuthRequest) {
     const teacherId = req.user?.userId || req.user?.sub;
     return this.assignmentsService.findAll(teacherId, {
       isPublished: query.isPublished !== undefined ? query.isPublished === 'true' : undefined,
@@ -164,7 +164,7 @@ export class AssignmentsController {
     status: 404,
     description: 'Asignación no encontrada o acceso denegado',
   })
-  async findOne(@Param('id') id: string, @Request() req: any) {
+  async findOne(@Param('id') id: string, @Request() req: AuthRequest) {
     const teacherId = req.user?.userId || req.user?.sub;
     return this.assignmentsService.findOne(id, teacherId);
   }
@@ -199,7 +199,7 @@ export class AssignmentsController {
   async update(
   @Param('id') id: string,
     @Body() updateDto: UpdateAssignmentDto,
-    @Request() req: any,
+    @Request() req: AuthRequest,
   ) {
     const teacherId = req.user?.userId || req.user?.sub;
     return this.assignmentsService.update(id, updateDto, teacherId);
@@ -228,7 +228,7 @@ export class AssignmentsController {
     status: 404,
     description: 'Asignación no encontrada o acceso denegado',
   })
-  async remove(@Param('id') id: string, @Request() req: any) {
+  async remove(@Param('id') id: string, @Request() req: AuthRequest) {
     const teacherId = req.user?.userId || req.user?.sub;
     await this.assignmentsService.remove(id, teacherId);
   }
@@ -266,7 +266,7 @@ export class AssignmentsController {
   async assignToClassrooms(
   @Param('id') id: string,
     @Body() dto: AssignToClassroomsDto,
-    @Request() req: any,
+    @Request() req: AuthRequest,
   ) {
     const teacherId = req.user?.userId || req.user?.sub;
     return this.assignmentsService.assignToClassrooms(id, dto, teacherId);
@@ -320,7 +320,7 @@ export class AssignmentsController {
   async getSubmissions(
   @Param('id') id: string,
     @Query() query: any,
-    @Request() req: any,
+    @Request() req: AuthRequest,
   ) {
     const teacherId = req.user?.userId || req.user?.sub;
     return this.assignmentsService.getSubmissions(id, teacherId, {
@@ -373,7 +373,7 @@ export class AssignmentsController {
   async gradeSubmission(
   @Param('submissionId') submissionId: string,
     @Body() dto: AssignmentGradeDto,
-    @Request() req: any,
+    @Request() req: AuthRequest,
   ) {
     const teacherId = req.user?.userId || req.user?.sub;
     return this.assignmentsService.gradeSubmission(submissionId, dto, teacherId);
@@ -407,7 +407,7 @@ export class AssignmentsController {
   async patch(
   @Param('id') id: string,
     @Body() patchDto: PatchAssignmentDto,
-    @Request() req: any,
+    @Request() req: AuthRequest,
   ) {
     const teacherId = req.user?.userId || req.user?.sub;
     return this.assignmentsService.patchAssignment(id, patchDto, teacherId);
@@ -441,7 +441,7 @@ export class AssignmentsController {
   async distribute(
   @Param('id') id: string,
     @Body() distributeDto: DistributeAssignmentDto,
-    @Request() req: any,
+    @Request() req: AuthRequest,
   ) {
     const teacherId = req.user?.userId || req.user?.sub;
     return this.assignmentsService.distributeAssignment(id, distributeDto, teacherId);
@@ -472,7 +472,7 @@ export class AssignmentsController {
   async duplicate(
   @Param('id') id: string,
     @Body() duplicateDto: DuplicateAssignmentDto,
-    @Request() req: any,
+    @Request() req: AuthRequest,
   ) {
     const teacherId = req.user?.userId || req.user?.sub;
     return this.assignmentsService.duplicateAssignment(id, duplicateDto, teacherId);
@@ -528,7 +528,7 @@ export class AssignmentsController {
   async publish(
   @Param('id') id: string,
     @Body('notifyStudents') notifyStudents: boolean = false,
-    @Request() req: any,
+    @Request() req: AuthRequest,
   ) {
     const teacherId = req.user?.userId || req.user?.sub;
     return this.assignmentsService.publishAssignment(id, teacherId, notifyStudents);
@@ -569,7 +569,7 @@ export class AssignmentsController {
     status: 404,
     description: 'Assignment not found or access denied',
   })
-  async close(@Param('id') id: string, @Request() req: any) {
+  async close(@Param('id') id: string, @Request() req: AuthRequest) {
     const teacherId = req.user?.userId || req.user?.sub;
     return this.assignmentsService.closeAssignment(id, teacherId);
   }
diff --git a/projects/gamilit/apps/backend/src/modules/assignments/controllers/student-assignments.controller.ts b/projects/gamilit/apps/backend/src/modules/assignments/controllers/student-assignments.controller.ts
index b1ae1de..1ea8059 100644
--- a/projects/gamilit/apps/backend/src/modules/assignments/controllers/student-assignments.controller.ts
+++ b/projects/gamilit/apps/backend/src/modules/assignments/controllers/student-assignments.controller.ts
@@ -73,7 +73,7 @@ export class StudentAssignmentsController {
       }],
     },
   })
-  async getMyAssignments(@Query() query: any, @Request() req: any) {
+  async getMyAssignments(@Query() query: any, @Request() req: AuthRequest) {
     const studentId = req.user?.userId || req.user?.sub;
     return this.assignmentsService.findStudentAssignments(studentId, {
       status: query.status,
@@ -104,7 +104,7 @@ export class StudentAssignmentsController {
     status: 404,
     description: 'Tarea no encontrada o no asignada a este estudiante',
   })
-  async getAssignmentDetails(@Param('id') id: string, @Request() req: any) {
+  async getAssignmentDetails(@Param('id') id: string, @Request() req: AuthRequest) {
     const studentId = req.user?.userId || req.user?.sub;
     return this.assignmentsService.findStudentAssignmentById(id, studentId);
   }
@@ -137,7 +137,7 @@ export class StudentAssignmentsController {
       },
     },
   })
-  async getGradesSummary(@Request() req: any) {
+  async getGradesSummary(@Request() req: AuthRequest) {
     const studentId = req.user?.userId || req.user?.sub;
     return this.assignmentsService.getStudentGradesSummary(studentId);
   }
diff --git a/projects/gamilit/apps/backend/src/modules/assignments/services/assignments.service.ts b/projects/gamilit/apps/backend/src/modules/assignments/services/assignments.service.ts
index c0a7367..923aa42 100644
--- a/projects/gamilit/apps/backend/src/modules/assignments/services/assignments.service.ts
+++ b/projects/gamilit/apps/backend/src/modules/assignments/services/assignments.service.ts
@@ -859,7 +859,7 @@ export class AssignmentsService {
    */
   async findStudentAssignments(
     studentId: string,
-    filters?: { status?: string; classroomId?: string },
+    _filters?: { status?: string; classroomId?: string },
   ): Promise<any[]> {
     // Get direct student assignments (without relation join - relations commented out)
     const studentAssignments = await this.assignmentStudentRepository.find({
diff --git a/projects/gamilit/apps/backend/src/modules/audit/interceptors/audit.interceptor.ts b/projects/gamilit/apps/backend/src/modules/audit/interceptors/audit.interceptor.ts
index 2ce3cc7..d0947c4 100644
--- a/projects/gamilit/apps/backend/src/modules/audit/interceptors/audit.interceptor.ts
+++ b/projects/gamilit/apps/backend/src/modules/audit/interceptors/audit.interceptor.ts
@@ -25,7 +25,7 @@ export class AuditInterceptor implements NestInterceptor {
 
   intercept(context: ExecutionContext, next: CallHandler): Observable<any> {
     const request = context.switchToHttp().getRequest<Request>();
-    const { method, url, _body, _user} = request;
+    const { method, url, body: _body, user: _user} = request;
 
     // Skip audit logging for certain endpoints
     if (this.shouldSkipAudit(url)) {
diff --git a/projects/gamilit/apps/backend/src/modules/auth/auth.service.ts b/projects/gamilit/apps/backend/src/modules/auth/auth.service.ts
index 8e6537c..9c42432 100644
--- a/projects/gamilit/apps/backend/src/modules/auth/auth.service.ts
+++ b/projects/gamilit/apps/backend/src/modules/auth/auth.service.ts
@@ -45,7 +45,7 @@ export class AuthService {
    * 4. Generate JWT tokens
    * 5. Return sanitized user + tokens
    */
-  async register(dto: any): Promise<AuthResponse> {
+  async register(_dto: any): Promise<AuthResponse> {
     throw new Error('Register method not implemented - UsersService required');
   }
 
@@ -59,7 +59,7 @@ export class AuthService {
    * 4. Generate JWT tokens
    * 5. Return sanitized user + tokens
    */
-  async login(dto: LoginDto): Promise<AuthResponse> {
+  async login(_dto: LoginDto): Promise<AuthResponse> {
     throw new Error('Login method not implemented - UsersService required');
   }
 
@@ -76,14 +76,14 @@ export class AuthService {
    * 3. Validate user is active
    * 4. Generate new access + refresh tokens
    */
-  async refreshToken(dto: RefreshTokenDto): Promise<TokenResponse> {
+  async refreshToken(_dto: RefreshTokenDto): Promise<TokenResponse> {
     throw new Error('RefreshToken method not implemented - UsersService required');
   }
 
   /**
    * Logout - Invalida tokens (client-side)
    */
-  async logout(userId: string): Promise<{ message: string }> {
+  async logout(_userId: string): Promise<{ message: string }> {
     // TODO: Implementar blacklist de tokens en Redis (opcional)
     // Por ahora, el logout es client-side (eliminar tokens de localStorage)
 
@@ -99,7 +99,7 @@ export class AuthService {
    * 2. Check if user exists and is active
    * 3. Return sanitized user (without password)
    */
-  async validateUser(userId: string) {
+  async validateUser(_userId: string) {
     throw new Error('ValidateUser method not implemented - UsersService required');
   }
 
diff --git a/projects/gamilit/apps/backend/src/modules/auth/controllers/auth.controller.ts b/projects/gamilit/apps/backend/src/modules/auth/controllers/auth.controller.ts
index c28a042..f17cfeb 100644
--- a/projects/gamilit/apps/backend/src/modules/auth/controllers/auth.controller.ts
+++ b/projects/gamilit/apps/backend/src/modules/auth/controllers/auth.controller.ts
@@ -72,7 +72,7 @@ export class AuthController {
   @ApiBody({ type: RegisterUserDto })
   async register(
     @Body() dto: RegisterUserDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<{ user: UserResponseDto; accessToken: string; refreshToken: string }> {
     const ip = req.ip;
     const userAgent = req.headers['user-agent'];
@@ -104,7 +104,7 @@ export class AuthController {
   @ApiBody({ type: LoginDto })
   async login(
     @Body() dto: LoginDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<{ user: UserResponseDto; accessToken: string; refreshToken: string }> {
     const ip = req.ip;
     const userAgent = req.headers['user-agent'];
@@ -129,7 +129,7 @@ export class AuthController {
   @ApiOperation({ summary: 'Cerrar sesión de usuario' })
   @ApiResponse({ status: 200, description: 'Sesión cerrada exitosamente' })
   @ApiResponse({ status: 401, description: 'No autenticado' })
-  async logout(@Request() req: any): Promise<{ message: string }> {
+  async logout(@Request() req: AuthRequest): Promise<{ message: string }> {
     // Extraer userId y sessionId del token JWT
     const userId = req.user?.id;
     const sessionId = req.user?.sessionId || 'current-session';
@@ -175,7 +175,7 @@ export class AuthController {
     type: UserResponseDto,
   })
   @ApiResponse({ status: 401, description: 'No autenticado' })
-  async getProfile(@Request() req: any): Promise<UserResponseDto> {
+  async getProfile(@Request() req: AuthRequest): Promise<UserResponseDto> {
     // Extraer userId del token JWT
     const userId = req.user?.id;
     const user = await this.authService.validateUser(userId);
@@ -185,7 +185,7 @@ export class AuthController {
     }
 
     // Convertir a UserResponseDto (sin password)
-    const { _encrypted_password, ...userResponse } = user;
+    const { encrypted_password: _encrypted_password, ...userResponse } = user;
     return userResponse as UserResponseDto;
   }
 
@@ -206,7 +206,7 @@ export class AuthController {
   @ApiResponse({ status: 400, description: 'Datos inválidos' })
   @ApiBody({ type: UpdateProfileDto })
   async updateProfile(
-    @Request() req: any,
+    @Request() req: AuthRequest,
       @Body() dto: UpdateProfileDto,
   ): Promise<UserResponseDto> {
     // Extraer userId del token JWT
@@ -220,7 +220,7 @@ export class AuthController {
     }
 
     // Convertir a UserResponseDto (sin password)
-    const { _encrypted_password, ...userResponse } = updatedUser;
+    const { encrypted_password: _encrypted_password, ...userResponse } = updatedUser;
     return userResponse as UserResponseDto;
   }
 
@@ -247,7 +247,7 @@ export class AuthController {
       },
     },
   })
-  async verifyEmail(@Body('token') token: string): Promise<{ message: string }> {
+  async verifyEmail(@Body('token') _token: string): Promise<{ message: string }> {
     // TODO: Implementar lógica de verificación de email
     // Por ahora retornamos éxito
     return { message: 'Email verificado exitosamente' };
@@ -275,7 +275,7 @@ export class AuthController {
       },
     },
   })
-  async forgotPassword(@Body('email') email: string): Promise<{ message: string }> {
+  async forgotPassword(@Body('email') _email: string): Promise<{ message: string }> {
     // TODO: Implementar lógica de forgot password
     return { message: 'Si el email existe, recibirás instrucciones para resetear tu contraseña' };
   }
@@ -305,8 +305,8 @@ export class AuthController {
     },
   })
   async resetPassword(
-    @Body('token') token: string,
-      @Body('newPassword') newPassword: string,
+    @Body('token') _token: string,
+      @Body('newPassword') _newPassword: string,
   ): Promise<{ message: string }> {
     // TODO: Implementar lógica de reset password
     return { message: 'Contraseña reseteada exitosamente' };
@@ -340,9 +340,9 @@ export class AuthController {
     },
   })
   async changePassword(
-    @Request() req: any,
-      @Body('currentPassword') currentPassword: string,
-      @Body('newPassword') newPassword: string,
+    @Request() req: AuthRequest,
+      @Body('currentPassword') _currentPassword: string,
+      @Body('newPassword') _newPassword: string,
   ): Promise<{ message: string }> {
     const _userId = req.user?.id;
     // TODO: Implementar lógica de cambio de contraseña
@@ -363,7 +363,7 @@ export class AuthController {
     isArray: true,
   })
   @ApiResponse({ status: 401, description: 'No autenticado' })
-  async getSessions(@Request() req: any): Promise<UserSessionResponseDto[]> {
+  async getSessions(@Request() req: AuthRequest): Promise<UserSessionResponseDto[]> {
     const userId = req.user?.id;
     return this.sessionService.getSessions(userId);
   }
@@ -391,7 +391,7 @@ export class AuthController {
   @ApiResponse({ status: 401, description: 'No autenticado' })
   @ApiResponse({ status: 404, description: 'Sesión no encontrada o no pertenece al usuario' })
   async revokeSession(
-    @Request() req: any,
+    @Request() req: AuthRequest,
       @Param('sessionId') sessionId: string,
   ): Promise<{ message: string }> {
     const userId = req.user?.id;
@@ -420,7 +420,7 @@ export class AuthController {
     },
   })
   @ApiResponse({ status: 401, description: 'No autenticado' })
-  async revokeAllSessions(@Request() req: any): Promise<{ message: string; count: number }> {
+  async revokeAllSessions(@Request() req: AuthRequest): Promise<{ message: string; count: number }> {
     const userId = req.user?.id;
     const currentSessionId = req.user?.sessionId || 'unknown';
     return this.sessionService.revokeAllSessions(userId, currentSessionId);
diff --git a/projects/gamilit/apps/backend/src/modules/auth/controllers/password.controller.ts b/projects/gamilit/apps/backend/src/modules/auth/controllers/password.controller.ts
index 13ad14e..126dc24 100644
--- a/projects/gamilit/apps/backend/src/modules/auth/controllers/password.controller.ts
+++ b/projects/gamilit/apps/backend/src/modules/auth/controllers/password.controller.ts
@@ -140,7 +140,7 @@ export class PasswordController {
   @ApiResponse({ status: 404, description: 'Usuario no encontrado' })
   @ApiBody({ type: ChangePasswordDto })
   async changePassword(
-    @Request() req: any,
+    @Request() req: AuthRequest,
       @Body() dto: ChangePasswordDto,
   ): Promise<{ message: string }> {
     // Extraer userId del token JWT
@@ -201,7 +201,7 @@ export class PasswordController {
   })
   @ApiResponse({ status: 401, description: 'No autenticado' })
   @ApiResponse({ status: 409, description: 'Email ya verificado' })
-  async resendVerification(@Request() req: any): Promise<{ message: string }> {
+  async resendVerification(@Request() req: AuthRequest): Promise<{ message: string }> {
     // Extraer userId del token JWT
     const userId = req.user?.id;
     return this.emailVerificationService.resendVerification(userId);
@@ -226,7 +226,7 @@ export class PasswordController {
     },
   })
   @ApiResponse({ status: 401, description: 'No autenticado' })
-  async checkVerificationStatus(@Request() req: any): Promise<{ verified: boolean }> {
+  async checkVerificationStatus(@Request() req: AuthRequest): Promise<{ verified: boolean }> {
     // Extraer userId del token JWT
     const userId = req.user?.id;
     return this.emailVerificationService.checkVerificationStatus(userId);
diff --git a/projects/gamilit/apps/backend/src/modules/auth/controllers/users.controller.ts b/projects/gamilit/apps/backend/src/modules/auth/controllers/users.controller.ts
index 05895bd..ecfdaff 100644
--- a/projects/gamilit/apps/backend/src/modules/auth/controllers/users.controller.ts
+++ b/projects/gamilit/apps/backend/src/modules/auth/controllers/users.controller.ts
@@ -59,7 +59,7 @@ export class UsersController {
     type: UserResponseDto,
   })
   @ApiResponse({ status: 401, description: 'No autenticado' })
-  async getProfile(@Request() req: any): Promise<UserResponseDto> {
+  async getProfile(@Request() req: AuthRequest): Promise<UserResponseDto> {
     const userId = req.user?.id;
     const user = await this.authService.validateUser(userId);
 
@@ -67,7 +67,7 @@ export class UsersController {
       throw new UnauthorizedException('Usuario no encontrado');
     }
 
-    const { _encrypted_password, ...userResponse } = user;
+    const { encrypted_password: _encrypted_password, ...userResponse } = user;
     return userResponse as UserResponseDto;
   }
 
@@ -88,7 +88,7 @@ export class UsersController {
   @ApiResponse({ status: 400, description: 'Datos inválidos' })
   @ApiBody({ type: UpdateProfileDto })
   async updateProfile(
-    @Request() req: any,
+    @Request() req: AuthRequest,
       @Body() dto: UpdateProfileDto,
   ): Promise<UserResponseDto> {
     const userId = req.user?.id;
@@ -98,7 +98,7 @@ export class UsersController {
       throw new UnauthorizedException('Usuario no encontrado');
     }
 
-    const { _encrypted_password, ...userResponse } = updatedUser;
+    const { encrypted_password: _encrypted_password, ...userResponse } = updatedUser;
     return userResponse as UserResponseDto;
   }
 
@@ -119,7 +119,7 @@ export class UsersController {
     },
   })
   @ApiResponse({ status: 401, description: 'No autenticado' })
-  async getPreferences(@Request() req: any): Promise<{ preferences: any }> {
+  async getPreferences(@Request() req: AuthRequest): Promise<{ preferences: any }> {
     const userId = req.user?.id;
     const preferences = await this.authService.getUserPreferences(userId);
     return { preferences };
@@ -151,7 +151,7 @@ export class UsersController {
     },
   })
   async updatePreferences(
-    @Request() req: any,
+    @Request() req: AuthRequest,
       @Body('preferences') preferences: any,
   ): Promise<{ preferences: any }> {
     const userId = req.user?.id;
@@ -194,7 +194,7 @@ export class UsersController {
     },
   })
   async uploadAvatar(
-    @Request() req: any,
+    @Request() req: AuthRequest,
       @UploadedFile() file: any,
   ): Promise<{ avatar_url: string }> {
     const userId = req.user?.id;
@@ -230,7 +230,7 @@ export class UsersController {
     },
   })
   @ApiResponse({ status: 401, description: 'No autenticado' })
-  async getStatistics(@Request() req: any): Promise<any> {
+  async getStatistics(@Request() req: AuthRequest): Promise<any> {
     const userId = req.user?.id;
     const statistics = await this.authService.getUserStatistics(userId);
     return statistics;
diff --git a/projects/gamilit/apps/backend/src/modules/auth/dto/assign-role.dto.ts b/projects/gamilit/apps/backend/src/modules/auth/dto/assign-role.dto.ts
index 5f506f1..6050bf0 100644
--- a/projects/gamilit/apps/backend/src/modules/auth/dto/assign-role.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/auth/dto/assign-role.dto.ts
@@ -52,7 +52,7 @@ export class AssignRoleDto {
    */
   @IsObject({ message: 'permissions debe ser un objeto JSON válido' })
   @IsOptional()
-    permissions?: Record<string, any>;
+    permissions?: Record<string, unknown>;
 
   /**
    * Fecha y hora de expiración del rol (opcional)
@@ -81,5 +81,5 @@ export class AssignRoleDto {
    */
   @IsObject({ message: 'metadata debe ser un objeto JSON válido' })
   @IsOptional()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/auth/dto/create-profile.dto.ts b/projects/gamilit/apps/backend/src/modules/auth/dto/create-profile.dto.ts
index 8392c8d..9c8f052 100644
--- a/projects/gamilit/apps/backend/src/modules/auth/dto/create-profile.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/auth/dto/create-profile.dto.ts
@@ -205,7 +205,7 @@ export class CreateProfileDto {
    */
   @IsObject()
   @IsOptional()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 
   /**
    * ID del usuario en auth.users
diff --git a/projects/gamilit/apps/backend/src/modules/auth/dto/create-tenant.dto.ts b/projects/gamilit/apps/backend/src/modules/auth/dto/create-tenant.dto.ts
index 9ce01d3..3428c10 100644
--- a/projects/gamilit/apps/backend/src/modules/auth/dto/create-tenant.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/auth/dto/create-tenant.dto.ts
@@ -126,7 +126,7 @@ export class CreateTenantDto {
    */
   @IsObject({ message: 'Las configuraciones deben ser un objeto JSON válido' })
   @IsOptional()
-    settings?: Record<string, any>;
+    settings?: Record<string, unknown>;
 
   /**
    * Metadata adicional del tenant (JSONB)
@@ -135,5 +135,5 @@ export class CreateTenantDto {
    */
   @IsObject({ message: 'La metadata debe ser un objeto JSON válido' })
   @IsOptional()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/auth/dto/create-user-preferences.dto.ts b/projects/gamilit/apps/backend/src/modules/auth/dto/create-user-preferences.dto.ts
index de1260c..c687f43 100644
--- a/projects/gamilit/apps/backend/src/modules/auth/dto/create-user-preferences.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/auth/dto/create-user-preferences.dto.ts
@@ -141,5 +141,5 @@ export class CreateUserPreferencesDto {
   })
   @IsOptional()
   @IsObject()
-    preferences?: Record<string, any>;
+    preferences?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/auth/dto/create-user.dto.ts b/projects/gamilit/apps/backend/src/modules/auth/dto/create-user.dto.ts
index 1702b25..bc3c42e 100644
--- a/projects/gamilit/apps/backend/src/modules/auth/dto/create-user.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/auth/dto/create-user.dto.ts
@@ -55,5 +55,5 @@ export class CreateUserDto {
    */
   @IsObject({ message: 'Los metadatos deben ser un objeto JSON' })
   @IsOptional()
-    raw_user_meta_data?: Record<string, any>;
+    raw_user_meta_data?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/auth/dto/profile-response.dto.ts b/projects/gamilit/apps/backend/src/modules/auth/dto/profile-response.dto.ts
index 45b6710..e358a8b 100644
--- a/projects/gamilit/apps/backend/src/modules/auth/dto/profile-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/auth/dto/profile-response.dto.ts
@@ -87,7 +87,7 @@ export class ProfileResponseDto {
     last_activity_at!: Date | null;
 
   @Expose()
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   @Expose()
     created_at!: Date;
diff --git a/projects/gamilit/apps/backend/src/modules/auth/dto/register-user.dto.ts b/projects/gamilit/apps/backend/src/modules/auth/dto/register-user.dto.ts
index 12f2fe6..ea28c7f 100644
--- a/projects/gamilit/apps/backend/src/modules/auth/dto/register-user.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/auth/dto/register-user.dto.ts
@@ -39,7 +39,7 @@ export class RegisterUserDto {
    */
   @IsObject({ message: 'Los metadatos deben ser un objeto JSON' })
   @IsOptional()
-    raw_user_meta_data?: Record<string, any>;
+    raw_user_meta_data?: Record<string, unknown>;
 
   // Campos opcionales adicionales para registro:
   // Nota: Estos campos se podrían mapear al Profile (auth_management.profiles)
diff --git a/projects/gamilit/apps/backend/src/modules/auth/dto/tenant-response.dto.ts b/projects/gamilit/apps/backend/src/modules/auth/dto/tenant-response.dto.ts
index f7d5237..f7b38a8 100644
--- a/projects/gamilit/apps/backend/src/modules/auth/dto/tenant-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/auth/dto/tenant-response.dto.ts
@@ -75,13 +75,13 @@ export class TenantResponseDto {
    * Configuraciones del tenant (JSONB)
    */
   @Expose()
-    settings!: Record<string, any>;
+    settings!: Record<string, unknown>;
 
   /**
    * Metadata adicional del tenant (JSONB)
    */
   @Expose()
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   /**
    * Fecha de creación del tenant
diff --git a/projects/gamilit/apps/backend/src/modules/auth/dto/update-user.dto.ts b/projects/gamilit/apps/backend/src/modules/auth/dto/update-user.dto.ts
index 4849f63..fb2d1f9 100644
--- a/projects/gamilit/apps/backend/src/modules/auth/dto/update-user.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/auth/dto/update-user.dto.ts
@@ -20,7 +20,7 @@ export class UpdateUserDto extends PartialType(
 ) {
   // Hereda de CreateUserDto excepto password y email:
   // - role?: GamilityRoleEnum
-  // - raw_user_meta_data?: Record<string, any>
+  // - raw_user_meta_data?: Record<string, unknown>
 
   // Campos opcionales adicionales para actualización:
   // (actualmente solo role y raw_user_meta_data son editables)
diff --git a/projects/gamilit/apps/backend/src/modules/auth/dto/user-preferences-response.dto.ts b/projects/gamilit/apps/backend/src/modules/auth/dto/user-preferences-response.dto.ts
index 51a8661..3a9d0a1 100644
--- a/projects/gamilit/apps/backend/src/modules/auth/dto/user-preferences-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/auth/dto/user-preferences-response.dto.ts
@@ -99,7 +99,7 @@ export class UserPreferencesResponseDto {
       dashboard_layout: 'grid',
     },
   })
-    preferences!: Record<string, any>;
+    preferences!: Record<string, unknown>;
 
   /**
    * Fecha de creación
diff --git a/projects/gamilit/apps/backend/src/modules/auth/dto/user-response.dto.ts b/projects/gamilit/apps/backend/src/modules/auth/dto/user-response.dto.ts
index e032efa..acbd225 100644
--- a/projects/gamilit/apps/backend/src/modules/auth/dto/user-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/auth/dto/user-response.dto.ts
@@ -99,7 +99,7 @@ export class UserResponseDto {
    * NOTA: Filtrar campos sensibles si existen
    */
   @Expose()
-    raw_user_meta_data!: Record<string, any>;
+    raw_user_meta_data!: Record<string, unknown>;
 
   /**
    * Fecha y hora de creación del registro
diff --git a/projects/gamilit/apps/backend/src/modules/auth/dto/user-role-response.dto.ts b/projects/gamilit/apps/backend/src/modules/auth/dto/user-role-response.dto.ts
index cf1b78f..95f66b0 100644
--- a/projects/gamilit/apps/backend/src/modules/auth/dto/user-role-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/auth/dto/user-role-response.dto.ts
@@ -38,7 +38,7 @@ export class UserRoleResponseDto {
    * Permisos específicos asociados a este rol
    */
   @Expose()
-    permissions!: Record<string, any>;
+    permissions!: Record<string, unknown>;
 
   /**
    * ID del usuario (Profile) que asignó este rol (nullable)
@@ -80,7 +80,7 @@ export class UserRoleResponseDto {
    * Metadata adicional del user_role
    */
   @Expose()
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   /**
    * Fecha de creación del registro
diff --git a/projects/gamilit/apps/backend/src/modules/auth/entities/auth-attempt.entity.ts b/projects/gamilit/apps/backend/src/modules/auth/entities/auth-attempt.entity.ts
index e2f12de..a4e4927 100644
--- a/projects/gamilit/apps/backend/src/modules/auth/entities/auth-attempt.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/auth/entities/auth-attempt.entity.ts
@@ -43,7 +43,7 @@ export class AuthAttempt {
     attempted_at!: Date;
 
   @Column({ type: 'jsonb', default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   // NOTA: La tabla auth_attempts NO tiene user_id
   // Es una tabla de auditoría independiente que solo registra el email
diff --git a/projects/gamilit/apps/backend/src/modules/auth/entities/profile.entity.ts b/projects/gamilit/apps/backend/src/modules/auth/entities/profile.entity.ts
index 9d15317..857a35a 100644
--- a/projects/gamilit/apps/backend/src/modules/auth/entities/profile.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/auth/entities/profile.entity.ts
@@ -125,7 +125,7 @@ export class Profile {
     last_activity_at!: Date | null;
 
   @Column({ type: 'jsonb', default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   @CreateDateColumn({ type: 'timestamp with time zone' })
     created_at!: Date;
diff --git a/projects/gamilit/apps/backend/src/modules/auth/entities/security-event.entity.ts b/projects/gamilit/apps/backend/src/modules/auth/entities/security-event.entity.ts
index 0526f64..12ccc8b 100644
--- a/projects/gamilit/apps/backend/src/modules/auth/entities/security-event.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/auth/entities/security-event.entity.ts
@@ -84,7 +84,7 @@ export class SecurityEvent {
    * @example { "failed_attempts": 3, "reason": "invalid_password" }
    */
   @Column({ type: 'jsonb', nullable: true })
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 
   /**
    * Fecha y hora de creación del evento
diff --git a/projects/gamilit/apps/backend/src/modules/auth/entities/tenant.entity.ts b/projects/gamilit/apps/backend/src/modules/auth/entities/tenant.entity.ts
index f795088..8e33c51 100644
--- a/projects/gamilit/apps/backend/src/modules/auth/entities/tenant.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/auth/entities/tenant.entity.ts
@@ -113,14 +113,14 @@ export class Tenant {
       timezone: 'America/Mexico_City',
     },
   })
-    settings!: Record<string, any>;
+    settings!: Record<string, unknown>;
 
   /**
    * Metadata adicional del tenant (JSONB)
    * @example { billing_contact: "admin@example.com", notes: "..." }
    */
   @Column({ type: 'jsonb', nullable: false, default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   /**
    * Fecha de creación del tenant
diff --git a/projects/gamilit/apps/backend/src/modules/auth/entities/user-preferences.entity.ts b/projects/gamilit/apps/backend/src/modules/auth/entities/user-preferences.entity.ts
index 8ec537d..fec1841 100644
--- a/projects/gamilit/apps/backend/src/modules/auth/entities/user-preferences.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/auth/entities/user-preferences.entity.ts
@@ -117,7 +117,7 @@ export class UserPreferences {
    */
   @Column({ type: 'jsonb', default: {} })
   @Index('idx_user_preferences_preferences', { synchronize: false }) // GIN index creado en DDL
-    preferences!: Record<string, any>;
+    preferences!: Record<string, unknown>;
 
   /**
    * Fecha de creación
diff --git a/projects/gamilit/apps/backend/src/modules/auth/entities/user-role.entity.ts b/projects/gamilit/apps/backend/src/modules/auth/entities/user-role.entity.ts
index 0a3c432..5b7a705 100644
--- a/projects/gamilit/apps/backend/src/modules/auth/entities/user-role.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/auth/entities/user-role.entity.ts
@@ -92,7 +92,7 @@ export class UserRole {
     nullable: false,
     default: { read: true, write: false, admin: false, analytics: false },
   })
-    permissions!: Record<string, any>;
+    permissions!: Record<string, unknown>;
 
   /**
    * ID del usuario (Profile) que asignó este rol (nullable)
@@ -143,7 +143,7 @@ export class UserRole {
    * @example { notes: "Rol temporal para proyecto X", reason: "..." }
    */
   @Column({ type: 'jsonb', nullable: false, default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   /**
    * Fecha de creación del registro
diff --git a/projects/gamilit/apps/backend/src/modules/auth/entities/user-session.entity.ts b/projects/gamilit/apps/backend/src/modules/auth/entities/user-session.entity.ts
index 20bdd36..10076d9 100644
--- a/projects/gamilit/apps/backend/src/modules/auth/entities/user-session.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/auth/entities/user-session.entity.ts
@@ -77,7 +77,7 @@ export class UserSession {
     revoked_at!: Date | null;
 
   @Column({ type: 'jsonb', default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   // Relaciones
   @ManyToOne(() => User, { onDelete: 'CASCADE' })
diff --git a/projects/gamilit/apps/backend/src/modules/auth/entities/user.entity.ts b/projects/gamilit/apps/backend/src/modules/auth/entities/user.entity.ts
index 5f8c113..39ee54c 100644
--- a/projects/gamilit/apps/backend/src/modules/auth/entities/user.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/auth/entities/user.entity.ts
@@ -137,7 +137,7 @@ export class User {
    * Metadatos adicionales del usuario en formato JSON
    */
   @Column({ type: 'jsonb', default: {} })
-    raw_user_meta_data!: Record<string, any>;
+    raw_user_meta_data!: Record<string, unknown>;
 
   /**
    * Fecha y hora de eliminación lógica (soft delete)
diff --git a/projects/gamilit/apps/backend/src/modules/auth/services/auth.service.ts b/projects/gamilit/apps/backend/src/modules/auth/services/auth.service.ts
index 64e9990..57d5b06 100644
--- a/projects/gamilit/apps/backend/src/modules/auth/services/auth.service.ts
+++ b/projects/gamilit/apps/backend/src/modules/auth/services/auth.service.ts
@@ -658,7 +658,7 @@ export class AuthService {
    * @returns UserResponseDto con campos derivados calculados
    */
   public toUserResponse(user: User): UserResponseDto {
-    const { _encrypted_password, ...userWithoutPassword } = user;
+    const { encrypted_password: _encrypted_password, ...userWithoutPassword } = user;
 
     // Calcular campos derivados para coherencia Frontend-Backend
     const emailVerified = !!user.email_confirmed_at;
diff --git a/projects/gamilit/apps/backend/src/modules/content/controllers/content-templates.controller.ts b/projects/gamilit/apps/backend/src/modules/content/controllers/content-templates.controller.ts
index d6e8127..0b237b6 100644
--- a/projects/gamilit/apps/backend/src/modules/content/controllers/content-templates.controller.ts
+++ b/projects/gamilit/apps/backend/src/modules/content/controllers/content-templates.controller.ts
@@ -42,9 +42,9 @@ export class ContentTemplatesController {
   @ApiResponse({ status: 200, description: 'Lista de plantillas obtenida exitosamente', type: [ContentTemplateResponseDto] })
   async findAll(
   @Query('type') type?: string,
-    @Query('category') category?: string,
+    @Query('category') _category?: string,
   ) {
-    return this.templatesService.findAll(type, category);
+    return this.templatesService.findAll(type);
   }
 
   /**
diff --git a/projects/gamilit/apps/backend/src/modules/content/dto/content-template-response.dto.ts b/projects/gamilit/apps/backend/src/modules/content/dto/content-template-response.dto.ts
index b944f9e..e6d2e86 100644
--- a/projects/gamilit/apps/backend/src/modules/content/dto/content-template-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/content/dto/content-template-response.dto.ts
@@ -38,11 +38,11 @@ export class ContentTemplateResponseDto {
 
   @ApiProperty({ description: 'Estructura JSON de la plantilla' })
   @Expose()
-    template_structure!: Record<string, any>;
+    template_structure!: Record<string, unknown>;
 
   @ApiPropertyOptional({ description: 'Valores predeterminados' })
   @Expose()
-    default_values?: Record<string, any>;
+    default_values?: Record<string, unknown>;
 
   @ApiPropertyOptional({ description: 'Campos requeridos' })
   @Expose()
@@ -82,7 +82,7 @@ export class ContentTemplateResponseDto {
 
   @ApiProperty({ description: 'Metadatos adicionales' })
   @Expose()
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   @ApiPropertyOptional({ description: 'ID del usuario creador' })
   @Expose()
diff --git a/projects/gamilit/apps/backend/src/modules/content/dto/create-content-template.dto.ts b/projects/gamilit/apps/backend/src/modules/content/dto/create-content-template.dto.ts
index 36d1f82..a5eaba5 100644
--- a/projects/gamilit/apps/backend/src/modules/content/dto/create-content-template.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/content/dto/create-content-template.dto.ts
@@ -62,7 +62,7 @@ export class CreateContentTemplateDto {
    */
   @ApiProperty({ description: 'Estructura JSON de la plantilla', example: { sections: [], fields: [] } })
   @IsObject()
-    template_structure!: Record<string, any>;
+    template_structure!: Record<string, unknown>;
 
   /**
    * Valores predeterminados JSON
@@ -70,7 +70,7 @@ export class CreateContentTemplateDto {
   @ApiPropertyOptional({ description: 'Valores predeterminados', example: { difficulty: 'medium', duration: 30 } })
   @IsOptional()
   @IsObject()
-    default_values?: Record<string, any>;
+    default_values?: Record<string, unknown>;
 
   /**
    * Campos requeridos
@@ -141,7 +141,7 @@ export class CreateContentTemplateDto {
   @ApiPropertyOptional({ description: 'Metadatos adicionales', example: {} })
   @IsOptional()
   @IsObject()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 
   /**
    * ID del creador
diff --git a/projects/gamilit/apps/backend/src/modules/content/dto/create-marie-curie-content.dto.ts b/projects/gamilit/apps/backend/src/modules/content/dto/create-marie-curie-content.dto.ts
index 2d8d80f..44a06af 100644
--- a/projects/gamilit/apps/backend/src/modules/content/dto/create-marie-curie-content.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/content/dto/create-marie-curie-content.dto.ts
@@ -72,7 +72,7 @@ export class CreateMarieCurieContentDto {
    */
   @ApiProperty({ description: 'Contenido estructurado JSON', example: { introduction: 'Texto introductorio...', main_content: 'Contenido principal...', key_points: [], timeline: [], quotes: [] } })
   @IsObject()
-    content!: Record<string, any>;
+    content!: Record<string, unknown>;
 
   // =====================================================
   // EDUCATIONAL METADATA
@@ -196,7 +196,7 @@ export class CreateMarieCurieContentDto {
   @ApiPropertyOptional({ description: 'Contexto cultural JSON', example: {} })
   @IsOptional()
   @IsObject()
-    cultural_context?: Record<string, any>;
+    cultural_context?: Record<string, unknown>;
 
   // =====================================================
   // PUBLICATION STATUS
@@ -286,5 +286,5 @@ export class CreateMarieCurieContentDto {
   @ApiPropertyOptional({ description: 'Metadatos adicionales', example: {} })
   @IsOptional()
   @IsObject()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/content/dto/create-media-file.dto.ts b/projects/gamilit/apps/backend/src/modules/content/dto/create-media-file.dto.ts
index 6ec0c35..ecc94a0 100644
--- a/projects/gamilit/apps/backend/src/modules/content/dto/create-media-file.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/content/dto/create-media-file.dto.ts
@@ -260,7 +260,7 @@ export class CreateMediaFileDto {
   @ApiPropertyOptional({ description: 'Información de procesamiento JSON', example: {} })
   @IsOptional()
   @IsObject()
-    processing_info?: Record<string, any>;
+    processing_info?: Record<string, unknown>;
 
   // =====================================================
   // SEARCH & ORGANIZATION
@@ -381,7 +381,7 @@ export class CreateMediaFileDto {
   @ApiPropertyOptional({ description: 'Datos EXIF JSON', example: {} })
   @IsOptional()
   @IsObject()
-    exif_data?: Record<string, any>;
+    exif_data?: Record<string, unknown>;
 
   /**
    * Metadatos adicionales
@@ -389,5 +389,5 @@ export class CreateMediaFileDto {
   @ApiPropertyOptional({ description: 'Metadatos adicionales', example: {} })
   @IsOptional()
   @IsObject()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/content/dto/marie-curie-content-response.dto.ts b/projects/gamilit/apps/backend/src/modules/content/dto/marie-curie-content-response.dto.ts
index d8abfe7..fdcca50 100644
--- a/projects/gamilit/apps/backend/src/modules/content/dto/marie-curie-content-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/content/dto/marie-curie-content-response.dto.ts
@@ -45,7 +45,7 @@ export class MarieCurieContentResponseDto {
 
   @ApiProperty({ description: 'Contenido estructurado JSON' })
   @Expose()
-    content!: Record<string, any>;
+    content!: Record<string, unknown>;
 
   // =====================================================
   // EDUCATIONAL METADATA
@@ -109,7 +109,7 @@ export class MarieCurieContentResponseDto {
 
   @ApiProperty({ description: 'Contexto cultural JSON' })
   @Expose()
-    cultural_context!: Record<string, any>;
+    cultural_context!: Record<string, unknown>;
 
   // =====================================================
   // PUBLICATION STATUS
@@ -161,7 +161,7 @@ export class MarieCurieContentResponseDto {
 
   @ApiProperty({ description: 'Metadatos adicionales' })
   @Expose()
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   @ApiProperty({ description: 'Fecha de creación' })
   @Expose()
diff --git a/projects/gamilit/apps/backend/src/modules/content/dto/media-file-response.dto.ts b/projects/gamilit/apps/backend/src/modules/content/dto/media-file-response.dto.ts
index 83bc32b..6792b9c 100644
--- a/projects/gamilit/apps/backend/src/modules/content/dto/media-file-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/content/dto/media-file-response.dto.ts
@@ -145,7 +145,7 @@ export class MediaFileResponseDto {
 
   @ApiProperty({ description: 'Información de procesamiento' })
   @Expose()
-    processing_info!: Record<string, any>;
+    processing_info!: Record<string, unknown>;
 
   // =====================================================
   // SEARCH & ORGANIZATION
@@ -213,11 +213,11 @@ export class MediaFileResponseDto {
 
   @ApiProperty({ description: 'Datos EXIF' })
   @Expose()
-    exif_data!: Record<string, any>;
+    exif_data!: Record<string, unknown>;
 
   @ApiProperty({ description: 'Metadatos adicionales' })
   @Expose()
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   // =====================================================
   // AUDIT TIMESTAMPS
diff --git a/projects/gamilit/apps/backend/src/modules/content/entities/content-template.entity.ts b/projects/gamilit/apps/backend/src/modules/content/entities/content-template.entity.ts
index 3cbf561..e37ceda 100644
--- a/projects/gamilit/apps/backend/src/modules/content/entities/content-template.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/content/entities/content-template.entity.ts
@@ -75,14 +75,14 @@ export class ContentTemplate {
    * Define cómo se estructura el contenido
    */
   @Column({ type: 'jsonb', default: {} })
-    template_structure!: Record<string, any>;
+    template_structure!: Record<string, unknown>;
 
   /**
    * Valores predeterminados JSON
    * Valores iniciales al crear contenido desde esta plantilla
    */
   @Column({ type: 'jsonb', nullable: true })
-    default_values?: Record<string, any>;
+    default_values?: Record<string, unknown>;
 
   /**
    * Campos requeridos en el contenido
@@ -146,7 +146,7 @@ export class ContentTemplate {
    * Metadatos adicionales en formato JSON
    */
   @Column({ type: 'jsonb', default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   /**
    * Fecha y hora de creación del registro
diff --git a/projects/gamilit/apps/backend/src/modules/content/entities/marie-curie-content.entity.ts b/projects/gamilit/apps/backend/src/modules/content/entities/marie-curie-content.entity.ts
index e322d8c..c3f1bf5 100644
--- a/projects/gamilit/apps/backend/src/modules/content/entities/marie-curie-content.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/content/entities/marie-curie-content.entity.ts
@@ -96,7 +96,7 @@ export class MarieCurieContent {
       main_content: '',
     },
   })
-    content!: Record<string, any>;
+    content!: Record<string, unknown>;
 
   // =====================================================
   // EDUCATIONAL METADATA
@@ -190,7 +190,7 @@ export class MarieCurieContent {
    * Contexto cultural en formato JSON
    */
   @Column({ type: 'jsonb', default: {} })
-    cultural_context!: Record<string, any>;
+    cultural_context!: Record<string, unknown>;
 
   // =====================================================
   // PUBLICATION STATUS
@@ -265,7 +265,7 @@ export class MarieCurieContent {
    * Metadatos adicionales en formato JSON
    */
   @Column({ type: 'jsonb', default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   /**
    * Fecha y hora de creación del registro
diff --git a/projects/gamilit/apps/backend/src/modules/content/entities/media-file.entity.ts b/projects/gamilit/apps/backend/src/modules/content/entities/media-file.entity.ts
index f58ec11..2640428 100644
--- a/projects/gamilit/apps/backend/src/modules/content/entities/media-file.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/content/entities/media-file.entity.ts
@@ -234,7 +234,7 @@ export class MediaFile {
    * Información de procesamiento en formato JSON
    */
   @Column({ type: 'jsonb', default: {} })
-    processing_info!: Record<string, any>;
+    processing_info!: Record<string, unknown>;
 
   // =====================================================
   // SEARCH & ORGANIZATION
@@ -326,13 +326,13 @@ export class MediaFile {
    * Datos EXIF del archivo (imágenes)
    */
   @Column({ type: 'jsonb', default: {} })
-    exif_data!: Record<string, any>;
+    exif_data!: Record<string, unknown>;
 
   /**
    * Metadatos adicionales en formato JSON
    */
   @Column({ type: 'jsonb', default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   // =====================================================
   // AUDIT TIMESTAMPS
diff --git a/projects/gamilit/apps/backend/src/modules/content/services/content-templates.service.ts b/projects/gamilit/apps/backend/src/modules/content/services/content-templates.service.ts
index 088b704..7062f11 100644
--- a/projects/gamilit/apps/backend/src/modules/content/services/content-templates.service.ts
+++ b/projects/gamilit/apps/backend/src/modules/content/services/content-templates.service.ts
@@ -38,7 +38,7 @@ export class ContentTemplatesService {
    * @param category - Categoría (opcional, no usado en DDL pero útil para filtros futuros)
    * @returns Lista de plantillas
    */
-  async findAll(type?: string?: string): Promise<ContentTemplate[]> {
+  async findAll(type?: string): Promise<ContentTemplate[]> {
     const query = this.templateRepo.createQueryBuilder('t');
 
     if (type) {
@@ -140,7 +140,7 @@ export class ContentTemplatesService {
    * @param category - Categoría de plantilla
    * @returns Lista de plantillas de la categoría
    */
-  async findByCategory(category: string): Promise<ContentTemplate[]> {
+  async findByCategory(_category: string): Promise<ContentTemplate[]> {
     // Actualmente retorna todas ya que no existe el campo category en DDL
     // Se puede extender con metadata o agregando el campo en una migración futura
     return this.templateRepo.find({
diff --git a/projects/gamilit/apps/backend/src/modules/educational/controllers/exercises.controller.ts b/projects/gamilit/apps/backend/src/modules/educational/controllers/exercises.controller.ts
index d8253cf..1d3ff2a 100644
--- a/projects/gamilit/apps/backend/src/modules/educational/controllers/exercises.controller.ts
+++ b/projects/gamilit/apps/backend/src/modules/educational/controllers/exercises.controller.ts
@@ -90,7 +90,7 @@ export class ExercisesController {
    */
   private normalizeSubmitData(dto: SubmitExerciseDto, req: any): {
     userId: string;
-    answers: Record<string, any>;
+    answers: Record<string, unknown>;
     timeSpentSeconds?: number;
     hintsUsed: number;
     powerupsUsed: string[];
@@ -105,7 +105,7 @@ export class ExercisesController {
     }
 
     // 2. Extraer respuestas (nuevo formato tiene prioridad)
-    let answers: Record<string, any>;
+    let answers: Record<string, unknown>;
 
     if (dto.answers) {
       // Formato nuevo (estándar)
@@ -220,7 +220,7 @@ export class ExercisesController {
     status: 500,
     description: 'Error interno del servidor',
   })
-  async findAll(@Request() req: any) {
+  async findAll(@Request() req: AuthRequest) {
     const userId = req.user.id;
     const userRole = req.user.role;
 
@@ -372,7 +372,7 @@ export class ExercisesController {
       },
     },
   })
-  async findOne(@Param('id') id: string, @Request() req: any) {
+  async findOne(@Param('id') id: string, @Request() req: AuthRequest) {
     const userId = req.user.id;
 
     // Obtener ejercicio
@@ -671,7 +671,7 @@ export class ExercisesController {
     status: 404,
     description: 'Módulo no encontrado',
   })
-  async findByModule(@Param('moduleId') moduleId: string, @Request() req: any) {
+  async findByModule(@Param('moduleId') moduleId: string, @Request() req: AuthRequest) {
     // Obtener ejercicios del módulo
     const exercises = await this.exercisesService.findByModuleId(moduleId);
 
@@ -818,7 +818,7 @@ export class ExercisesController {
     },
   })
   async validateContentByExerciseType(
-  @Body() body: { exercise_type: ExerciseTypeEnum; content: Record<string, any> },
+  @Body() body: { exercise_type: ExerciseTypeEnum; content: Record<string, unknown> },
   ) {
     this.exercisesService.validateContentByExerciseType(body.exercise_type, body.content);
     return {
@@ -943,7 +943,7 @@ export class ExercisesController {
   async submitExercise(
     @Param('id') exerciseId: string,
       @Body() dto: SubmitExerciseDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<SubmitExerciseResponseDto> {
     // ========================================
     // 1. NORMALIZACIÓN
diff --git a/projects/gamilit/apps/backend/src/modules/educational/controllers/media-upload.controller.ts b/projects/gamilit/apps/backend/src/modules/educational/controllers/media-upload.controller.ts
index 414d4d6..720e274 100644
--- a/projects/gamilit/apps/backend/src/modules/educational/controllers/media-upload.controller.ts
+++ b/projects/gamilit/apps/backend/src/modules/educational/controllers/media-upload.controller.ts
@@ -80,7 +80,7 @@ export class MediaUploadController {
   })
   @ApiResponse({ status: 400, description: 'Archivo inválido o excede límite de tamaño' })
   async uploadFile(
-    @Request() req: any,
+    @Request() req: AuthRequest,
     @UploadedFile() file: any,
     @Body() dto: UploadMediaDto,
   ): Promise<MediaAttachment> {
diff --git a/projects/gamilit/apps/backend/src/modules/educational/controllers/media.controller.ts b/projects/gamilit/apps/backend/src/modules/educational/controllers/media.controller.ts
index 823b896..6ff897f 100644
--- a/projects/gamilit/apps/backend/src/modules/educational/controllers/media.controller.ts
+++ b/projects/gamilit/apps/backend/src/modules/educational/controllers/media.controller.ts
@@ -349,7 +349,7 @@ export class MediaController {
   })
   async updateProcessingStatus(
   @Param('id') id: string,
-    @Body() body: { status: ProcessingStatusEnum; metadata?: Record<string, any> },
+    @Body() body: { status: ProcessingStatusEnum; metadata?: Record<string, unknown> },
   ) {
     return this.mediaService.updateProcessingStatus(id, body.status, body.metadata);
   }
diff --git a/projects/gamilit/apps/backend/src/modules/educational/controllers/modules.controller.ts b/projects/gamilit/apps/backend/src/modules/educational/controllers/modules.controller.ts
index 1fac320..3e13fae 100644
--- a/projects/gamilit/apps/backend/src/modules/educational/controllers/modules.controller.ts
+++ b/projects/gamilit/apps/backend/src/modules/educational/controllers/modules.controller.ts
@@ -110,7 +110,7 @@ export class ModulesController {
     status: 500,
     description: 'Error interno del servidor',
   })
-  async findAll(@Request() req: any, @Query() query: GetModulesQueryDto) {
+  async findAll(@Request() req: AuthRequest, @Query() query: GetModulesQueryDto) {
     const userId = req.user.id;
     // Reutilizar getUserModules que ya tiene la lógica correcta para ambas tablas
     // Ahora acepta classroomId opcional para filtrar
diff --git a/projects/gamilit/apps/backend/src/modules/educational/dto/exercises/create-exercise.dto.ts b/projects/gamilit/apps/backend/src/modules/educational/dto/exercises/create-exercise.dto.ts
index 012191d..f542380 100644
--- a/projects/gamilit/apps/backend/src/modules/educational/dto/exercises/create-exercise.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/educational/dto/exercises/create-exercise.dto.ts
@@ -84,7 +84,7 @@ export class CreateExerciseDto {
    */
   @IsOptional()
   @IsObject()
-    config?: Record<string, any>;
+    config?: Record<string, unknown>;
 
   /**
    * Contenido del ejercicio (JSONB) (REQUERIDO)
@@ -92,21 +92,21 @@ export class CreateExerciseDto {
    */
   @IsOptional()
   @IsObject()
-    content?: Record<string, any>;
+    content?: Record<string, unknown>;
 
   /**
    * Solución del ejercicio (JSONB)
    */
   @IsOptional()
   @IsObject()
-    solution?: Record<string, any>;
+    solution?: Record<string, unknown>;
 
   /**
    * Rúbrica de evaluación (JSONB)
    */
   @IsOptional()
   @IsObject()
-    rubric?: Record<string, any>;
+    rubric?: Record<string, unknown>;
 
   // =====================================================
   // GRADING & SCORING
@@ -233,7 +233,7 @@ export class CreateExerciseDto {
    */
   @IsOptional()
   @IsObject()
-    comodines_config?: Record<string, any>;
+    comodines_config?: Record<string, unknown>;
 
   // =====================================================
   // GAMIFICATION & REWARDS
@@ -345,5 +345,5 @@ export class CreateExerciseDto {
    */
   @IsOptional()
   @IsObject()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/educational/dto/exercises/exercise-response.dto.ts b/projects/gamilit/apps/backend/src/modules/educational/dto/exercises/exercise-response.dto.ts
index 44c1c7d..e04e8cf 100644
--- a/projects/gamilit/apps/backend/src/modules/educational/dto/exercises/exercise-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/educational/dto/exercises/exercise-response.dto.ts
@@ -61,16 +61,16 @@ export class ExerciseResponseDto {
     exercise_type!: ExerciseTypeEnum;
 
   @Expose()
-    config!: Record<string, any>;
+    config!: Record<string, unknown>;
 
   @Expose()
-    content!: Record<string, any>;
+    content!: Record<string, unknown>;
 
   @Expose()
-    solution?: Record<string, any>;
+    solution?: Record<string, unknown>;
 
   @Expose()
-    rubric?: Record<string, any>;
+    rubric?: Record<string, unknown>;
 
   // =====================================================
   // GRADING & SCORING
@@ -132,7 +132,7 @@ export class ExerciseResponseDto {
     comodines_allowed!: ComodinTypeEnum[];
 
   @Expose()
-    comodines_config!: Record<string, any>;
+    comodines_config!: Record<string, unknown>;
 
   // =====================================================
   // GAMIFICATION & REWARDS
@@ -187,7 +187,7 @@ export class ExerciseResponseDto {
     prerequisites?: string[];
 
   @Expose()
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   // =====================================================
   // AUDIT FIELDS
diff --git a/projects/gamilit/apps/backend/src/modules/educational/dto/exercises/submit-exercise.dto.ts b/projects/gamilit/apps/backend/src/modules/educational/dto/exercises/submit-exercise.dto.ts
index 31f411e..9956455 100644
--- a/projects/gamilit/apps/backend/src/modules/educational/dto/exercises/submit-exercise.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/educational/dto/exercises/submit-exercise.dto.ts
@@ -60,7 +60,7 @@ export class SubmitExerciseDto {
   @IsOptional()
   @IsObject({ message: 'answers must be an object' })
   @IsNotEmpty({ message: 'answers cannot be empty' })
-    answers?: Record<string, any>;
+    answers?: Record<string, unknown>;
 
   /**
    * Timestamp de inicio del ejercicio (milisegundos desde epoch)
@@ -133,7 +133,7 @@ export class SubmitExerciseDto {
   })
   @IsOptional()
   @IsObject()
-    submitted_answers?: Record<string, any>;
+    submitted_answers?: Record<string, unknown>;
 
   /**
    * @deprecated Usar 'startedAt' para calcular tiempo
diff --git a/projects/gamilit/apps/backend/src/modules/educational/dto/media/media-response.dto.ts b/projects/gamilit/apps/backend/src/modules/educational/dto/media/media-response.dto.ts
index 521edcb..340bce4 100644
--- a/projects/gamilit/apps/backend/src/modules/educational/dto/media/media-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/educational/dto/media/media-response.dto.ts
@@ -211,7 +211,7 @@ export class MediaResponseDto {
    * Metadatos adicionales
    */
   @Expose()
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   /**
    * Fecha de creación
diff --git a/projects/gamilit/apps/backend/src/modules/educational/dto/media/upload-media.dto.ts b/projects/gamilit/apps/backend/src/modules/educational/dto/media/upload-media.dto.ts
index 60cef3f..5af0ffb 100644
--- a/projects/gamilit/apps/backend/src/modules/educational/dto/media/upload-media.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/educational/dto/media/upload-media.dto.ts
@@ -246,5 +246,5 @@ export class UploadMediaDto {
    */
   @IsOptional()
   @IsObject()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/educational/dto/module4/infografia-interactiva-answer.dto.ts b/projects/gamilit/apps/backend/src/modules/educational/dto/module4/infografia-interactiva-answer.dto.ts
index d68263f..b2cb203 100644
--- a/projects/gamilit/apps/backend/src/modules/educational/dto/module4/infografia-interactiva-answer.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/educational/dto/module4/infografia-interactiva-answer.dto.ts
@@ -46,7 +46,7 @@ export class InfografiaInteractivaAnswerDto {
     },
   })
   @IsObject({ message: 'answers must be an object' })
-    answers: Record<string, any>;
+    answers: Record<string, unknown>;
 
   @ApiProperty({
     description:
diff --git a/projects/gamilit/apps/backend/src/modules/educational/dto/module4/navegacion-hipertextual-answer.dto.ts b/projects/gamilit/apps/backend/src/modules/educational/dto/module4/navegacion-hipertextual-answer.dto.ts
index 339ae14..d897310 100644
--- a/projects/gamilit/apps/backend/src/modules/educational/dto/module4/navegacion-hipertextual-answer.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/educational/dto/module4/navegacion-hipertextual-answer.dto.ts
@@ -59,5 +59,5 @@ export class NavegacionHipertextualAnswerDto {
     },
   })
   @IsObject({ message: 'information_found must be an object' })
-    information_found: Record<string, any>;
+    information_found: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/educational/dto/modules/create-module.dto.ts b/projects/gamilit/apps/backend/src/modules/educational/dto/modules/create-module.dto.ts
index 9f04419..7bb5285 100644
--- a/projects/gamilit/apps/backend/src/modules/educational/dto/modules/create-module.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/educational/dto/modules/create-module.dto.ts
@@ -66,7 +66,7 @@ export class CreateModuleDto {
    */
   @IsOptional()
   @IsObject()
-    content?: Record<string, any>;
+    content?: Record<string, unknown>;
 
   /**
    * Índice de orden para la secuencia de módulos (REQUERIDO)
@@ -345,14 +345,14 @@ export class CreateModuleDto {
    */
   @IsOptional()
   @IsObject()
-    settings?: Record<string, any>;
+    settings?: Record<string, unknown>;
 
   /**
    * Metadatos adicionales (JSONB)
    */
   @IsOptional()
   @IsObject()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 
   /**
    * Total de ejercicios en el módulo
diff --git a/projects/gamilit/apps/backend/src/modules/educational/dto/modules/module-response.dto.ts b/projects/gamilit/apps/backend/src/modules/educational/dto/modules/module-response.dto.ts
index 23f8435..477295f 100644
--- a/projects/gamilit/apps/backend/src/modules/educational/dto/modules/module-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/educational/dto/modules/module-response.dto.ts
@@ -34,7 +34,7 @@ export class ModuleResponseDto {
     summary?: string;
 
   @Expose()
-    content!: Record<string, any>;
+    content!: Record<string, unknown>;
 
   @Expose()
     order_index!: number;
@@ -165,10 +165,10 @@ export class ModuleResponseDto {
     cover_image_url?: string;
 
   @Expose()
-    settings!: Record<string, any>;
+    settings!: Record<string, unknown>;
 
   @Expose()
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   // =====================================================
   // AUDIT FIELDS
diff --git a/projects/gamilit/apps/backend/src/modules/educational/dto/rubrics/create-rubric.dto.ts b/projects/gamilit/apps/backend/src/modules/educational/dto/rubrics/create-rubric.dto.ts
index 44d096b..e8cf010 100644
--- a/projects/gamilit/apps/backend/src/modules/educational/dto/rubrics/create-rubric.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/educational/dto/rubrics/create-rubric.dto.ts
@@ -65,7 +65,7 @@ export class CreateRubricDto {
    * Estructura: {"criteria_1": {"name": string, "levels": {}, "weight": number}}
    */
   @IsObject()
-    criteria!: Record<string, any>;
+    criteria!: Record<string, unknown>;
 
   /**
    * Escala de puntuación en formato JSONB
@@ -73,7 +73,7 @@ export class CreateRubricDto {
    */
   @IsOptional()
   @IsObject()
-    scoring_scale?: Record<string, any>;
+    scoring_scale?: Record<string, unknown>;
 
   /**
    * Peso porcentual de esta rúbrica (1-100%)
@@ -125,7 +125,7 @@ export class CreateRubricDto {
    */
   @IsOptional()
   @IsObject()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 
   /**
    * ID del usuario que crea la rúbrica
diff --git a/projects/gamilit/apps/backend/src/modules/educational/dto/rubrics/rubric-response.dto.ts b/projects/gamilit/apps/backend/src/modules/educational/dto/rubrics/rubric-response.dto.ts
index c2816fa..4ca6fb5 100644
--- a/projects/gamilit/apps/backend/src/modules/educational/dto/rubrics/rubric-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/educational/dto/rubrics/rubric-response.dto.ts
@@ -55,13 +55,13 @@ export class RubricResponseDto {
    * Criterios de evaluación en formato JSONB
    */
   @Expose()
-    criteria!: Record<string, any>;
+    criteria!: Record<string, unknown>;
 
   /**
    * Escala de puntuación
    */
   @Expose()
-    scoring_scale!: Record<string, any>;
+    scoring_scale!: Record<string, unknown>;
 
   /**
    * Peso porcentual de la rúbrica
@@ -105,7 +105,7 @@ export class RubricResponseDto {
    * Metadatos adicionales
    */
   @Expose()
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   /**
    * ID del usuario que creó la rúbrica
diff --git a/projects/gamilit/apps/backend/src/modules/educational/entities/assessment-rubric.entity.ts b/projects/gamilit/apps/backend/src/modules/educational/entities/assessment-rubric.entity.ts
index 0ff71f2..9203c28 100644
--- a/projects/gamilit/apps/backend/src/modules/educational/entities/assessment-rubric.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/educational/entities/assessment-rubric.entity.ts
@@ -76,14 +76,14 @@ export class AssessmentRubric {
    * Incluye niveles de logro con puntos y descripciones
    */
   @Column({ type: 'jsonb', default: {} })
-    criteria: Record<string, any> = {};
+    criteria: Record<string, unknown> = {};
 
   /**
    * Escala de puntuación en formato JSONB
    * Estructura: {"min": number, "max": number, "passing": number}
    */
   @Column({ type: 'jsonb', default: { min: 0, max: 100, passing: 70 } })
-    scoring_scale!: Record<string, any>;
+    scoring_scale!: Record<string, unknown>;
 
   /**
    * Peso porcentual de esta rúbrica en la evaluación total (1-100%)
@@ -120,7 +120,7 @@ export class AssessmentRubric {
    * Puede incluir configuraciones específicas de evaluación
    */
   @Column({ type: 'jsonb', default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   /**
    * ID del usuario que creó la rúbrica
diff --git a/projects/gamilit/apps/backend/src/modules/educational/entities/exercise.entity.ts b/projects/gamilit/apps/backend/src/modules/educational/entities/exercise.entity.ts
index 8fda38d..9aac9b4 100644
--- a/projects/gamilit/apps/backend/src/modules/educational/entities/exercise.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/educational/entities/exercise.entity.ts
@@ -150,7 +150,7 @@ export class Exercise {
    * - etc.
    */
   @Column({ type: 'jsonb', default: {} })
-    config!: Record<string, any>;
+    config!: Record<string, unknown>;
 
   /**
    * Contenido del ejercicio (JSONB)
@@ -165,20 +165,20 @@ export class Exercise {
       correct_answers: [],
     },
   })
-    content!: Record<string, any>;
+    content!: Record<string, unknown>;
 
   /**
    * Solución del ejercicio (JSONB)
    * Información privada no visible para estudiantes durante la resolución
    */
   @Column({ type: 'jsonb', nullable: true })
-    solution?: Record<string, any>;
+    solution?: Record<string, unknown>;
 
   /**
    * Rúbrica de evaluación (JSONB)
    */
   @Column({ type: 'jsonb', nullable: true })
-    rubric?: Record<string, any>;
+    rubric?: Record<string, unknown>;
 
   // =====================================================
   // GRADING & SCORING
@@ -328,7 +328,7 @@ export class Exercise {
       segunda_oportunidad: { cost: 40, enabled: true },
     },
   })
-    comodines_config!: Record<string, any>;
+    comodines_config!: Record<string, unknown>;
 
   // =====================================================
   // GAMIFICATION & REWARDS
@@ -423,7 +423,7 @@ export class Exercise {
    * Metadatos adicionales (JSONB)
    */
   @Column({ type: 'jsonb', default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   // =====================================================
   // AUDIT FIELDS
diff --git a/projects/gamilit/apps/backend/src/modules/educational/entities/media-resource.entity.ts b/projects/gamilit/apps/backend/src/modules/educational/entities/media-resource.entity.ts
index 7cf3434..3bde789 100644
--- a/projects/gamilit/apps/backend/src/modules/educational/entities/media-resource.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/educational/entities/media-resource.entity.ts
@@ -241,7 +241,7 @@ export class MediaResource {
    * Puede incluir información técnica, codec, bitrate, etc.
    */
   @Column({ type: 'jsonb', default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   /**
    * Fecha y hora de creación del registro
diff --git a/projects/gamilit/apps/backend/src/modules/educational/entities/module.entity.ts b/projects/gamilit/apps/backend/src/modules/educational/entities/module.entity.ts
index 8a52576..e16c5b1 100644
--- a/projects/gamilit/apps/backend/src/modules/educational/entities/module.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/educational/entities/module.entity.ts
@@ -94,7 +94,7 @@ export class Module {
       multimedia_resources: [],
     },
   })
-    content!: Record<string, any>;
+    content!: Record<string, unknown>;
 
   /**
    * Índice de orden para la secuencia de módulos
@@ -350,13 +350,13 @@ export class Module {
    * Configuraciones del módulo (JSONB)
    */
   @Column({ type: 'jsonb', default: {} })
-    settings!: Record<string, any>;
+    settings!: Record<string, unknown>;
 
   /**
    * Metadatos adicionales (JSONB)
    */
   @Column({ type: 'jsonb', default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   // =====================================================
   // AUDIT FIELDS
diff --git a/projects/gamilit/apps/backend/src/modules/educational/services/exercises.service.ts b/projects/gamilit/apps/backend/src/modules/educational/services/exercises.service.ts
index 0c6de5c..2178a6d 100644
--- a/projects/gamilit/apps/backend/src/modules/educational/services/exercises.service.ts
+++ b/projects/gamilit/apps/backend/src/modules/educational/services/exercises.service.ts
@@ -195,8 +195,8 @@ export class ExercisesService {
    */
   validateContentByExerciseType(
     exerciseType: ExerciseTypeEnum,
-    content: Record<string, any>,
-    config?: Record<string, any>,
+    content: Record<string, unknown>,
+    config?: Record<string, unknown>,
   ): void {
     if (!content) {
       throw new BadRequestException('Content is required');
@@ -474,10 +474,10 @@ export class ExercisesService {
    * @returns Sanitized content without correct answers
    */
   private sanitizeContent(
-    content: Record<string, any>,
-    config: Record<string, any>,
+    content: Record<string, unknown>,
+    config: Record<string, unknown>,
     exerciseType: ExerciseTypeEnum,
-  ): Record<string, any> {
+  ): Record<string, unknown> {
     if (!content) {
       return content;
     }
diff --git a/projects/gamilit/apps/backend/src/modules/educational/services/media.service.ts b/projects/gamilit/apps/backend/src/modules/educational/services/media.service.ts
index 03f91a5..1967ec5 100644
--- a/projects/gamilit/apps/backend/src/modules/educational/services/media.service.ts
+++ b/projects/gamilit/apps/backend/src/modules/educational/services/media.service.ts
@@ -85,7 +85,7 @@ export class MediaService {
   async updateProcessingStatus(
     id: string,
     status: ProcessingStatusEnum,
-    metadata?: Record<string, any>,
+    metadata?: Record<string, unknown>,
   ): Promise<MediaResource> {
     const media = await this.findById(id);
     if (!media) {
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/controllers/classroom-missions.controller.ts b/projects/gamilit/apps/backend/src/modules/gamification/controllers/classroom-missions.controller.ts
index 4fdd464..d2461d5 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/controllers/classroom-missions.controller.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/controllers/classroom-missions.controller.ts
@@ -141,7 +141,7 @@ export class ClassroomMissionsController {
   async assignMissionToClassroom(
   @Param('classroomId') classroomId: string,
     @Body() dto: AssignClassroomMissionDto,
-    @Request() req: any,
+    @Request() req: AuthRequest,
   ) {
     const teacherId = req.user.id;
     return this.classroomMissionsService.assignMissionToClassroom(classroomId, teacherId, dto);
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/controllers/mission-templates.controller.ts b/projects/gamilit/apps/backend/src/modules/gamification/controllers/mission-templates.controller.ts
index 8bfa60d..4481e79 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/controllers/mission-templates.controller.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/controllers/mission-templates.controller.ts
@@ -204,7 +204,7 @@ export class MissionTemplatesController {
     status: 400,
     description: 'Datos inválidos',
   })
-  async create(@Body() dto: CreateMissionTemplateDto, @Request() req: any) {
+  async create(@Body() dto: CreateMissionTemplateDto, @Request() req: AuthRequest) {
     const createdBy = req.user.id;
     return this.templatesService.create(dto, createdBy);
   }
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/controllers/missions.controller.ts b/projects/gamilit/apps/backend/src/modules/gamification/controllers/missions.controller.ts
index 26198bb..5a64cc4 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/controllers/missions.controller.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/controllers/missions.controller.ts
@@ -110,7 +110,7 @@ export class MissionsController {
     status: 401,
     description: 'No autenticado - Token JWT inválido o ausente',
   })
-  async getDailyMissions(@Request() req: any) {
+  async getDailyMissions(@Request() req: AuthRequest) {
     const userId = req.user.id;
     return this.missionsService.findByTypeAndUser(userId, MissionTypeEnum.DAILY);
   }
@@ -179,7 +179,7 @@ export class MissionsController {
     status: 401,
     description: 'No autenticado - Token JWT inválido o ausente',
   })
-  async getWeeklyMissions(@Request() req: any) {
+  async getWeeklyMissions(@Request() req: AuthRequest) {
     const userId = req.user.id;
     return this.missionsService.findByTypeAndUser(userId, MissionTypeEnum.WEEKLY);
   }
@@ -234,7 +234,7 @@ export class MissionsController {
     status: 401,
     description: 'No autenticado - Token JWT inválido o ausente',
   })
-  async getSpecialMissions(@Request() req: any) {
+  async getSpecialMissions(@Request() req: AuthRequest) {
     const userId = req.user.id;
     return this.missionsService.findByTypeAndUser(userId, MissionTypeEnum.SPECIAL);
   }
@@ -297,7 +297,7 @@ export class MissionsController {
     status: 403,
     description: 'Acceso denegado - El userId no coincide con el usuario autenticado',
   })
-  async getStats(@Param('userId') userId: string, @Request() req: any) {
+  async getStats(@Param('userId') userId: string, @Request() req: AuthRequest) {
     // Validar que el userId coincide con el usuario autenticado
     if (userId !== req.user.id) {
       throw new HttpException('Forbidden: Cannot access stats of another user', HttpStatus.FORBIDDEN);
@@ -360,7 +360,7 @@ export class MissionsController {
     status: 404,
     description: 'Misión no encontrada',
   })
-  async startMission(@Param('id') missionId: string, @Request() req: any) {
+  async startMission(@Param('id') missionId: string, @Request() req: AuthRequest) {
     const userId = req.user.id;
     return this.missionsService.startMission(missionId, userId);
   }
@@ -447,7 +447,7 @@ export class MissionsController {
   async updateProgress(
   @Param('id') missionId: string,
     @Body() dto: UpdateMissionProgressDto,
-    @Request() req: any,
+    @Request() req: AuthRequest,
   ) {
     const userId = req.user.id;
     return this.missionsService.updateProgress(
@@ -566,7 +566,7 @@ export class MissionsController {
     status: 404,
     description: 'Misión no encontrada',
   })
-  async claimRewards(@Param('id') missionId: string, @Request() req: any) {
+  async claimRewards(@Param('id') missionId: string, @Request() req: AuthRequest) {
     const userId = req.user.id;
     const result = await this.missionsService.claimRewards(missionId, userId);
     return { success: true, data: result };
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/controllers/ranks.controller.ts b/projects/gamilit/apps/backend/src/modules/gamification/controllers/ranks.controller.ts
index 3ead4da..6a38236 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/controllers/ranks.controller.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/controllers/ranks.controller.ts
@@ -110,7 +110,7 @@ export class RanksController {
   })
   @ApiResponse({ status: 401, description: 'No autenticado' })
   @ApiResponse({ status: 404, description: 'Usuario sin rango inicializado' })
-  async getCurrentRank(@Request() req: any): Promise<UserRank> {
+  async getCurrentRank(@Request() req: AuthRequest): Promise<UserRank> {
     const userId = req.user.sub;
     return this.ranksService.getCurrentRank(userId);
   }
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/controllers/user-stats.controller.ts b/projects/gamilit/apps/backend/src/modules/gamification/controllers/user-stats.controller.ts
index 4811b69..161172c 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/controllers/user-stats.controller.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/controllers/user-stats.controller.ts
@@ -281,7 +281,7 @@ export class UserStatsController {
   })
   async updateUserStats(
   @Param('userId') userId: string,
-    @Body() updateData: Record<string, any>,
+    @Body() updateData: Record<string, unknown>,
   ) {
     // Support increment operations for convenience
     const stats = await this.userStatsService.findByUserId(userId);
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/dto/achievements/achievement-response.dto.ts b/projects/gamilit/apps/backend/src/modules/gamification/dto/achievements/achievement-response.dto.ts
index bc014c9..c764ccd 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/dto/achievements/achievement-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/dto/achievements/achievement-response.dto.ts
@@ -47,10 +47,10 @@ export class AchievementResponseDto {
   // =====================================================
 
   @Expose()
-    conditions!: Record<string, any>;
+    conditions!: Record<string, unknown>;
 
   @Expose()
-    rewards!: Record<string, any>;
+    rewards!: Record<string, unknown>;
 
   @Expose()
     ml_coins_reward!: number;
@@ -96,7 +96,7 @@ export class AchievementResponseDto {
   // =====================================================
 
   @Expose()
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   @Expose()
     created_by?: string;
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/dto/achievements/create-achievement.dto.ts b/projects/gamilit/apps/backend/src/modules/gamification/dto/achievements/create-achievement.dto.ts
index 0a92222..44844b3 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/dto/achievements/create-achievement.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/dto/achievements/create-achievement.dto.ts
@@ -83,14 +83,14 @@ export class CreateAchievementDto {
    * Condiciones JSON para desbloquear (REQUERIDO)
    */
   @IsObject()
-    conditions!: Record<string, any>;
+    conditions!: Record<string, unknown>;
 
   /**
    * Recompensas JSON otorgadas
    */
   @IsOptional()
   @IsObject()
-    rewards?: Record<string, any>;
+    rewards?: Record<string, unknown>;
 
   /**
    * Recompensa de ML Coins
@@ -153,7 +153,7 @@ export class CreateAchievementDto {
 
   @IsOptional()
   @IsObject()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 
   @IsOptional()
   @IsUUID()
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/dto/achievements/update-achievement.dto.ts b/projects/gamilit/apps/backend/src/modules/gamification/dto/achievements/update-achievement.dto.ts
index 8d12a29..d3d64e1 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/dto/achievements/update-achievement.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/dto/achievements/update-achievement.dto.ts
@@ -58,11 +58,11 @@ export class UpdateAchievementDto {
 
   @IsOptional()
   @IsObject()
-    conditions?: Record<string, any>;
+    conditions?: Record<string, unknown>;
 
   @IsOptional()
   @IsObject()
-    rewards?: Record<string, any>;
+    rewards?: Record<string, unknown>;
 
   @IsOptional()
   @IsInt()
@@ -122,5 +122,5 @@ export class UpdateAchievementDto {
 
   @IsOptional()
   @IsObject()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/dto/comodines/inventory-response.dto.ts b/projects/gamilit/apps/backend/src/modules/gamification/dto/comodines/inventory-response.dto.ts
index 30438bf..a11c091 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/dto/comodines/inventory-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/dto/comodines/inventory-response.dto.ts
@@ -78,7 +78,7 @@ export class InventoryResponseDto {
     description: 'Metadatos adicionales',
     example: { last_purchase_date: '2025-11-01T10:00:00Z' },
   })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   @ApiProperty({
     description: 'Fecha de creación',
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/dto/leaderboard/leaderboard-entry.dto.ts b/projects/gamilit/apps/backend/src/modules/gamification/dto/leaderboard/leaderboard-entry.dto.ts
index de0801c..0b623a2 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/dto/leaderboard/leaderboard-entry.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/dto/leaderboard/leaderboard-entry.dto.ts
@@ -73,5 +73,5 @@ export class LeaderboardEntryDto {
    * Metadata adicional (escuela, aula, etc.)
    */
   @Expose()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/dto/mission-templates/create-mission-template.dto.ts b/projects/gamilit/apps/backend/src/modules/gamification/dto/mission-templates/create-mission-template.dto.ts
index 38d7306..80a4fba 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/dto/mission-templates/create-mission-template.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/dto/mission-templates/create-mission-template.dto.ts
@@ -197,5 +197,5 @@ export class CreateMissionTemplateDto {
   })
   @IsOptional()
   @IsObject()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/dto/mission-templates/mission-template.dto.ts b/projects/gamilit/apps/backend/src/modules/gamification/dto/mission-templates/mission-template.dto.ts
index 8f2f6cf..bf26961 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/dto/mission-templates/mission-template.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/dto/mission-templates/mission-template.dto.ts
@@ -125,7 +125,7 @@ export class MissionTemplateDto {
     description: 'Additional metadata',
     example: { tags: ['beginner', 'daily'] },
   })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   @ApiProperty({
     description: 'Creation timestamp',
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/dto/missions/assign-classroom-mission.dto.ts b/projects/gamilit/apps/backend/src/modules/gamification/dto/missions/assign-classroom-mission.dto.ts
index ef4b402..8e7d414 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/dto/missions/assign-classroom-mission.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/dto/missions/assign-classroom-mission.dto.ts
@@ -177,5 +177,5 @@ export class AssignClassroomMissionDto {
   })
   @IsObject()
   @IsOptional()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/dto/missions/classroom-mission-response.dto.ts b/projects/gamilit/apps/backend/src/modules/gamification/dto/missions/classroom-mission-response.dto.ts
index 0a41d67..cbedbd0 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/dto/missions/classroom-mission-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/dto/missions/classroom-mission-response.dto.ts
@@ -144,7 +144,7 @@ export class ClassroomMissionResponseDto {
       custom_instructions: 'Complete before Friday',
     },
   })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   @ApiProperty({
     description: 'Creation timestamp',
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/dto/ml-coins/create-transaction.dto.ts b/projects/gamilit/apps/backend/src/modules/gamification/dto/ml-coins/create-transaction.dto.ts
index 780d80c..21841d1 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/dto/ml-coins/create-transaction.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/dto/ml-coins/create-transaction.dto.ts
@@ -113,5 +113,5 @@ export class CreateTransactionDto {
   })
   @IsOptional()
   @IsObject()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/dto/ml-coins/transaction-response.dto.ts b/projects/gamilit/apps/backend/src/modules/gamification/dto/ml-coins/transaction-response.dto.ts
index 207b1e7..1d7e086 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/dto/ml-coins/transaction-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/dto/ml-coins/transaction-response.dto.ts
@@ -85,7 +85,7 @@ export class TransactionResponseDto {
     description: 'Metadatos adicionales',
     example: { exercise_difficulty: 'hard', perfect_score: true },
   })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   @ApiProperty({
     description: 'Fecha de creación',
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/dto/user-achievements/grant-achievement.dto.ts b/projects/gamilit/apps/backend/src/modules/gamification/dto/user-achievements/grant-achievement.dto.ts
index 0dc6d22..6a8c262 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/dto/user-achievements/grant-achievement.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/dto/user-achievements/grant-achievement.dto.ts
@@ -70,7 +70,7 @@ export class GrantAchievementDto {
    */
   @IsObject({ message: 'progress_data debe ser un objeto JSON válido' })
   @IsOptional()
-    progress_data?: Record<string, any>;
+    progress_data?: Record<string, unknown>;
 
   /**
    * Metadata adicional
@@ -79,5 +79,5 @@ export class GrantAchievementDto {
    */
   @IsObject({ message: 'metadata debe ser un objeto JSON válido' })
   @IsOptional()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/dto/user-achievements/user-achievement-response.dto.ts b/projects/gamilit/apps/backend/src/modules/gamification/dto/user-achievements/user-achievement-response.dto.ts
index 7cc9376..e4c060a 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/dto/user-achievements/user-achievement-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/dto/user-achievements/user-achievement-response.dto.ts
@@ -44,16 +44,16 @@ export class UserAchievementResponseDto {
     rewards_claimed!: boolean;
 
   @Expose()
-    rewards_received!: Record<string, any>;
+    rewards_received!: Record<string, unknown>;
 
   @Expose()
-    progress_data!: Record<string, any>;
+    progress_data!: Record<string, unknown>;
 
   @Expose()
     milestones_reached!: string[] | null;
 
   @Expose()
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   @Expose()
   @Type(() => Date)
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/dto/user-ranks/create-user-rank.dto.ts b/projects/gamilit/apps/backend/src/modules/gamification/dto/user-ranks/create-user-rank.dto.ts
index 93ba9af..4efba3e 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/dto/user-ranks/create-user-rank.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/dto/user-ranks/create-user-rank.dto.ts
@@ -116,5 +116,5 @@ export class CreateUserRankDto {
 
   @IsOptional()
   @IsObject()
-    rank_metadata?: Record<string, any>;
+    rank_metadata?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/dto/user-ranks/update-user-rank.dto.ts b/projects/gamilit/apps/backend/src/modules/gamification/dto/user-ranks/update-user-rank.dto.ts
index 49465d4..acda81a 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/dto/user-ranks/update-user-rank.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/dto/user-ranks/update-user-rank.dto.ts
@@ -121,5 +121,5 @@ export class UpdateUserRankDto {
    */
   @IsOptional()
   @IsObject()
-    rank_metadata?: Record<string, any>;
+    rank_metadata?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/dto/user-ranks/user-rank-response.dto.ts b/projects/gamilit/apps/backend/src/modules/gamification/dto/user-ranks/user-rank-response.dto.ts
index 43583d3..7f87af7 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/dto/user-ranks/user-rank-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/dto/user-ranks/user-rank-response.dto.ts
@@ -75,7 +75,7 @@ export class UserRankResponseDto {
     is_current!: boolean;
 
   @Expose()
-    rank_metadata!: Record<string, any>;
+    rank_metadata!: Record<string, unknown>;
 
   // =====================================================
   // AUDIT
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/dto/user-stats/update-user-stats.dto.ts b/projects/gamilit/apps/backend/src/modules/gamification/dto/user-stats/update-user-stats.dto.ts
index f58a373..433c93b 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/dto/user-stats/update-user-stats.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/dto/user-stats/update-user-stats.dto.ts
@@ -217,5 +217,5 @@ export class UpdateUserStatsDto {
 
   @IsOptional()
   @IsObject()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/dto/user-stats/user-stats-response.dto.ts b/projects/gamilit/apps/backend/src/modules/gamification/dto/user-stats/user-stats-response.dto.ts
index 97a232f..61c599e 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/dto/user-stats/user-stats-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/dto/user-stats/user-stats-response.dto.ts
@@ -157,7 +157,7 @@ export class UserStatsResponseDto {
   // =====================================================
 
   @Expose()
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   @Expose()
     created_at!: Date;
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/entities/achievement.entity.ts b/projects/gamilit/apps/backend/src/modules/gamification/entities/achievement.entity.ts
index 08f662a..02ebd04 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/entities/achievement.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/entities/achievement.entity.ts
@@ -104,14 +104,14 @@ export class Achievement {
    * Ejemplo: {"type": "progress", "requirements": {"exercises_completed": 10}}
    */
   @Column({ type: 'jsonb' })
-    conditions!: Record<string, any>;
+    conditions!: Record<string, unknown>;
 
   /**
    * Recompensas JSON otorgadas al desbloquear
    * Ejemplo: {"xp": 100, "badge": null, "ml_coins": 50}
    */
   @Column({ type: 'jsonb', default: { xp: 100, badge: null, ml_coins: 50 } })
-    rewards!: Record<string, any>;
+    rewards!: Record<string, unknown>;
 
   /**
    * Recompensa de ML Coins (campo adicional para queries rápidas)
@@ -187,7 +187,7 @@ export class Achievement {
    * Metadatos adicionales en formato JSON
    */
   @Column({ type: 'jsonb', default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   /**
    * ID del usuario que creó el achievement
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/entities/comodin-usage-log.entity.ts b/projects/gamilit/apps/backend/src/modules/gamification/entities/comodin-usage-log.entity.ts
index 3a0f042..9f90f86 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/entities/comodin-usage-log.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/entities/comodin-usage-log.entity.ts
@@ -92,14 +92,14 @@ export class ComodinUsageLog {
    * Ejemplo: hint text, highlighted text
    */
   @Column({ type: 'jsonb', nullable: true })
-    value_provided?: Record<string, any>;
+    value_provided?: Record<string, unknown>;
 
   /**
    * Contexto adicional del uso (JSONB)
    * Ejemplo: tiempo restante, intentos previos
    */
   @Column({ type: 'jsonb', default: {} })
-    usage_context!: Record<string, any>;
+    usage_context!: Record<string, unknown>;
 
   // =====================================================
   // TIMESTAMP
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/entities/comodines-inventory.entity.ts b/projects/gamilit/apps/backend/src/modules/gamification/entities/comodines-inventory.entity.ts
index 1f9f27c..d8b9fb3 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/entities/comodines-inventory.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/entities/comodines-inventory.entity.ts
@@ -93,7 +93,7 @@ export class ComodinesInventory {
     segunda_oportunidad_cost!: number;
 
   @Column({ type: 'jsonb', default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   @CreateDateColumn({ type: 'timestamp with time zone' })
     created_at!: Date;
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/entities/inventory-transaction.entity.ts b/projects/gamilit/apps/backend/src/modules/gamification/entities/inventory-transaction.entity.ts
index 8394b4b..cae4f08 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/entities/inventory-transaction.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/entities/inventory-transaction.entity.ts
@@ -74,7 +74,7 @@ export class InventoryTransaction {
    * - { "exercise_id": "uuid-...", "success": true } para USE
    */
   @Column({ type: 'jsonb', nullable: true })
-    metadata!: Record<string, any> | null;
+    metadata!: Record<string, unknown> | null;
 
   @Column({ type: 'timestamptz', default: () => 'NOW()' })
     created_at!: Date;
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/entities/mission-template.entity.ts b/projects/gamilit/apps/backend/src/modules/gamification/entities/mission-template.entity.ts
index 7e9c046..8159815 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/entities/mission-template.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/entities/mission-template.entity.ts
@@ -133,7 +133,7 @@ export class MissionTemplate {
     color!: string | null;
 
   @Column({ type: 'jsonb', default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   // Audit
   @CreateDateColumn({ type: 'timestamp with time zone' })
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/entities/ml-coins-transaction.entity.ts b/projects/gamilit/apps/backend/src/modules/gamification/entities/ml-coins-transaction.entity.ts
index 5910466..ceb7727 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/entities/ml-coins-transaction.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/entities/ml-coins-transaction.entity.ts
@@ -81,7 +81,7 @@ export class MLCoinsTransaction {
     bonus_applied!: boolean;
 
   @Column({ type: 'jsonb', default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   @CreateDateColumn({ type: 'timestamp with time zone' })
     created_at!: Date;
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/entities/shop-category.entity.ts b/projects/gamilit/apps/backend/src/modules/gamification/entities/shop-category.entity.ts
index 6cf8e84..acf5848 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/entities/shop-category.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/entities/shop-category.entity.ts
@@ -79,7 +79,7 @@ export class ShopCategory {
    * Metadatos adicionales en formato JSON
    */
   @Column({ type: 'jsonb', default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   /**
    * Fecha y hora de creación del registro
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/entities/shop-item.entity.ts b/projects/gamilit/apps/backend/src/modules/gamification/entities/shop-item.entity.ts
index f599e5b..ab85061 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/entities/shop-item.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/entities/shop-item.entity.ts
@@ -192,7 +192,7 @@ export class ShopItem {
    * Ejemplo: {"type": "xp_boost", "multiplier": 2.0, "duration_minutes": 60}
    */
   @Column({ type: 'jsonb', nullable: true })
-    effect_data?: Record<string, any>;
+    effect_data?: Record<string, unknown>;
 
   // =====================================================
   // METADATA & AUDIT
@@ -202,7 +202,7 @@ export class ShopItem {
    * Metadatos adicionales en formato JSON
    */
   @Column({ type: 'jsonb', default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   /**
    * ID del usuario que creó el item
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/entities/user-achievement.entity.ts b/projects/gamilit/apps/backend/src/modules/gamification/entities/user-achievement.entity.ts
index 5659073..98aa1a6 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/entities/user-achievement.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/entities/user-achievement.entity.ts
@@ -92,14 +92,14 @@ export class UserAchievement {
    * Ejemplo: { "ml_coins": 50, "items": [{"type": "boost_xp", "quantity": 1}] }
    */
   @Column({ type: 'jsonb', default: {} })
-    rewards_received!: Record<string, any>;
+    rewards_received!: Record<string, unknown>;
 
   /**
    * Datos de progreso específicos por achievement (JSONB)
    * Ejemplo: { "levels_completed": [1, 2, 5], "current_streak": 3 }
    */
   @Column({ type: 'jsonb', default: {} })
-    progress_data!: Record<string, any>;
+    progress_data!: Record<string, unknown>;
 
   /**
    * Milestones alcanzados (array de strings)
@@ -112,7 +112,7 @@ export class UserAchievement {
    * Metadata adicional en JSONB
    */
   @Column({ type: 'jsonb', default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   /**
    * Fecha en que el usuario comenzó a trabajar en el achievement
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/entities/user-purchase.entity.ts b/projects/gamilit/apps/backend/src/modules/gamification/entities/user-purchase.entity.ts
index 30f9db3..111c1e0 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/entities/user-purchase.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/entities/user-purchase.entity.ts
@@ -120,7 +120,7 @@ export class UserPurchase {
    * Ejemplo: {"applied_at": "...", "effect": {...}}
    */
   @Column({ type: 'jsonb', default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   /**
    * Fecha y hora de la compra
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/entities/user-rank.entity.ts b/projects/gamilit/apps/backend/src/modules/gamification/entities/user-rank.entity.ts
index 8da799d..6fa4f2f 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/entities/user-rank.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/entities/user-rank.entity.ts
@@ -162,7 +162,7 @@ export class UserRank {
    * Metadatos adicionales del rango en formato JSON
    */
   @Column({ type: 'jsonb', default: {} })
-    rank_metadata!: Record<string, any>;
+    rank_metadata!: Record<string, unknown>;
 
   // =====================================================
   // AUDIT
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/entities/user-stats.entity.ts b/projects/gamilit/apps/backend/src/modules/gamification/entities/user-stats.entity.ts
index 72c5c78..86fe6ce 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/entities/user-stats.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/entities/user-stats.entity.ts
@@ -292,7 +292,7 @@ export class UserStats {
    * Metadatos adicionales en formato JSON
    */
   @Column({ type: 'jsonb', default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   /**
    * Fecha y hora de creación del registro
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/services/achievements.service.ts b/projects/gamilit/apps/backend/src/modules/gamification/services/achievements.service.ts
index 3e56377..72944c6 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/services/achievements.service.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/services/achievements.service.ts
@@ -244,7 +244,7 @@ export class AchievementsService {
   /**
    * Evalúa si las estadísticas del usuario cumplen con las condiciones del logro
    */
-  private meetsConditions(userStats: UserStats, conditions: Record<string, any>): boolean {
+  private meetsConditions(userStats: UserStats, conditions: Record<string, unknown>): boolean {
     const type = conditions.type || 'generic';
 
     switch (type) {
diff --git a/projects/gamilit/apps/backend/src/modules/gamification/services/missions.service.ts b/projects/gamilit/apps/backend/src/modules/gamification/services/missions.service.ts
index f89fe69..dea1916 100644
--- a/projects/gamilit/apps/backend/src/modules/gamification/services/missions.service.ts
+++ b/projects/gamilit/apps/backend/src/modules/gamification/services/missions.service.ts
@@ -83,7 +83,8 @@ export class MissionsService {
     try {
       const stats = await this.userStatsService.findByUserId(userId);
       return stats.level || 1;
-    } catch () {
+      // eslint-disable-next-line @typescript-eslint/no-unused-vars
+    } catch (_error) {
       this.logger.warn(`Could not fetch user level for ${userId}, defaulting to 1`);
       return 1;
     }
diff --git a/projects/gamilit/apps/backend/src/modules/health/__tests__/health.e2e-spec.ts b/projects/gamilit/apps/backend/src/modules/health/__tests__/health.e2e-spec.ts
index f816537..6c599db 100644
--- a/projects/gamilit/apps/backend/src/modules/health/__tests__/health.e2e-spec.ts
+++ b/projects/gamilit/apps/backend/src/modules/health/__tests__/health.e2e-spec.ts
@@ -199,7 +199,7 @@ describe('HealthController (e2e)', () => {
       const startTime = Date.now();
       return request(app.getHttpServer())
         .get('/health')
-        .expect((res: any) => {
+        .expect((_res: any) => {
           const duration = Date.now() - startTime;
           expect(duration).toBeLessThan(5000); // 5 seconds max
         });
diff --git a/projects/gamilit/apps/backend/src/modules/health/__tests__/health.service.spec.ts b/projects/gamilit/apps/backend/src/modules/health/__tests__/health.service.spec.ts
index 0930c30..b7a8dc4 100644
--- a/projects/gamilit/apps/backend/src/modules/health/__tests__/health.service.spec.ts
+++ b/projects/gamilit/apps/backend/src/modules/health/__tests__/health.service.spec.ts
@@ -17,7 +17,7 @@ describe('HealthService', () => {
   let configService: jest.Mocked<ConfigService>;
 
   const createMockDataSource = (isHealthy = true): jest.Mocked<DataSource> => ({
-    query: jest.fn().mockImplementation((sql: string?: any[]) => {
+    query: jest.fn().mockImplementation((sql: string, _params?: any[]) => {
       if (isHealthy) {
         if (sql.includes('SELECT 1')) {
           return Promise.resolve([{ '?column?': 1 }]);
@@ -45,7 +45,7 @@ describe('HealthService', () => {
 
     configService = {
       get: jest.fn().mockImplementation((key: string, defaultValue?: any) => {
-        const config: Record<string, any> = {
+        const config: Record<string, unknown> = {
           NODE_ENV: 'test',
           npm_package_version: '1.0.0',
         };
diff --git a/projects/gamilit/apps/backend/src/modules/health/dto/health-check.dto.ts b/projects/gamilit/apps/backend/src/modules/health/dto/health-check.dto.ts
index 9af2b44..a32efd3 100644
--- a/projects/gamilit/apps/backend/src/modules/health/dto/health-check.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/health/dto/health-check.dto.ts
@@ -10,7 +10,7 @@ export interface HealthCheckDetailDto {
   status: HealthStatus;
   responseTime: number;
   message: string;
-  details?: Record<string, any>;
+  details?: Record<string, unknown>;
 }
 
 export interface HealthCheckDto {
@@ -52,7 +52,7 @@ export class HealthCheckDetailSchema {
     required: false,
     example: { tables: 122 },
   })
-    details?: Record<string, any>;
+    details?: Record<string, unknown>;
 }
 
 export class HealthCheckSchema {
@@ -96,7 +96,7 @@ export class HealthCheckSchema {
       },
     },
   })
-    checks!: Record<string, any>;
+    checks!: Record<string, unknown>;
 
   @ApiProperty({
     description: 'Application version',
diff --git a/projects/gamilit/apps/backend/src/modules/notifications/controllers/notification-devices.controller.ts b/projects/gamilit/apps/backend/src/modules/notifications/controllers/notification-devices.controller.ts
index baf4790..0402704 100644
--- a/projects/gamilit/apps/backend/src/modules/notifications/controllers/notification-devices.controller.ts
+++ b/projects/gamilit/apps/backend/src/modules/notifications/controllers/notification-devices.controller.ts
@@ -144,7 +144,7 @@ export class NotificationDevicesController {
   })
   async registerDevice(
     @Body() registerDto: RegisterDeviceDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<DeviceResponseDto> {
     const userId = req.user.sub;
 
@@ -185,7 +185,7 @@ export class NotificationDevicesController {
     status: 401,
     description: 'No autenticado',
   })
-  async getUserDevices(@Request() req: any): Promise<DevicesListResponseDto> {
+  async getUserDevices(@Request() req: AuthRequest): Promise<DevicesListResponseDto> {
     const userId = req.user.sub;
     const devices = await this.deviceService.getUserDevices(userId, false);
 
@@ -234,7 +234,7 @@ export class NotificationDevicesController {
   })
   async getDeviceById(
     @Param('id') deviceId: string,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<DeviceResponseDto> {
     const userId = req.user.sub;
     const device = await this.deviceService.getDeviceById(deviceId, userId);
@@ -286,7 +286,7 @@ export class NotificationDevicesController {
   async updateDeviceName(
     @Param('id') deviceId: string,
       @Body() updateDto: UpdateDeviceNameDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<DeviceResponseDto> {
     const userId = req.user.sub;
 
@@ -345,7 +345,7 @@ export class NotificationDevicesController {
   })
   async deleteDevice(
     @Param('id') deviceId: string,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<void> {
     const userId = req.user.sub;
     await this.deviceService.deleteDevice(deviceId, userId);
diff --git a/projects/gamilit/apps/backend/src/modules/notifications/controllers/notification-multichannel.controller.ts b/projects/gamilit/apps/backend/src/modules/notifications/controllers/notification-multichannel.controller.ts
index eaf3ef2..7a2c50a 100644
--- a/projects/gamilit/apps/backend/src/modules/notifications/controllers/notification-multichannel.controller.ts
+++ b/projects/gamilit/apps/backend/src/modules/notifications/controllers/notification-multichannel.controller.ts
@@ -107,7 +107,7 @@ export class NotificationMultiChannelController {
   })
   async createMultiChannel(
     @Body() createDto: CreateNotificationDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<NotificationResponseDto> {
     // Validar que el usuario solo crea notificaciones para sí mismo
     // (a menos que sea admin - validación futura)
@@ -192,7 +192,7 @@ export class NotificationMultiChannelController {
   })
   async sendFromTemplate(
     @Body() sendDto: SendFromTemplateDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<NotificationResponseDto> {
     // Validar ownership
     if (sendDto.userId !== req.user.sub) {
diff --git a/projects/gamilit/apps/backend/src/modules/notifications/controllers/notification-preferences.controller.ts b/projects/gamilit/apps/backend/src/modules/notifications/controllers/notification-preferences.controller.ts
index 2879c53..a62ffd6 100644
--- a/projects/gamilit/apps/backend/src/modules/notifications/controllers/notification-preferences.controller.ts
+++ b/projects/gamilit/apps/backend/src/modules/notifications/controllers/notification-preferences.controller.ts
@@ -82,7 +82,7 @@ export class NotificationPreferencesController {
     description: 'No autenticado',
   })
   async getUserPreferences(
-    @Request() req: any,
+    @Request() req: AuthRequest,
   ): Promise<PreferencesListResponseDto> {
     const userId = req.user.sub;
     const preferences = await this.preferenceService.getUserPreferences(userId);
@@ -128,7 +128,7 @@ export class NotificationPreferencesController {
   async updatePreference(
     @Param('notificationType') notificationType: string,
       @Body() updateDto: UpdatePreferenceDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<PreferenceResponseDto> {
     const userId = req.user.sub;
 
@@ -175,7 +175,7 @@ export class NotificationPreferencesController {
   })
   async updateMultiple(
     @Body() updateDto: UpdateMultiplePreferencesDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<PreferencesListResponseDto> {
     const userId = req.user.sub;
 
diff --git a/projects/gamilit/apps/backend/src/modules/notifications/dto/notifications/send-from-template.dto.ts b/projects/gamilit/apps/backend/src/modules/notifications/dto/notifications/send-from-template.dto.ts
index d524a02..2469359 100644
--- a/projects/gamilit/apps/backend/src/modules/notifications/dto/notifications/send-from-template.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/notifications/dto/notifications/send-from-template.dto.ts
@@ -202,5 +202,5 @@ export class SendFromTemplateDto {
   })
   @IsObject()
   @IsOptional()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/notifications/entities/multichannel/notification-log.entity.ts b/projects/gamilit/apps/backend/src/modules/notifications/entities/multichannel/notification-log.entity.ts
index f08e14e..48eb1ee 100644
--- a/projects/gamilit/apps/backend/src/modules/notifications/entities/multichannel/notification-log.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/notifications/entities/multichannel/notification-log.entity.ts
@@ -169,7 +169,7 @@ export class NotificationLog {
    * @optional
    */
   @Column({ type: 'jsonb', nullable: true })
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 
   @CreateDateColumn({ name: 'created_at', type: 'timestamp with time zone' })
     createdAt!: Date;
diff --git a/projects/gamilit/apps/backend/src/modules/notifications/entities/multichannel/notification.entity.ts b/projects/gamilit/apps/backend/src/modules/notifications/entities/multichannel/notification.entity.ts
index bb3036c..98324ae 100644
--- a/projects/gamilit/apps/backend/src/modules/notifications/entities/multichannel/notification.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/notifications/entities/multichannel/notification.entity.ts
@@ -80,7 +80,7 @@ export class Notification {
    * - assignment: { assignment_id, due_date }
    */
   @Column({ type: 'jsonb', nullable: true, default: {} })
-    data?: Record<string, any>;
+    data?: Record<string, unknown>;
 
   /**
    * Prioridad de la notificación
@@ -129,5 +129,5 @@ export class Notification {
    * Para datos que no encajan en 'data': icon, action_url, related_entity_type/id
    */
   @Column({ type: 'jsonb', nullable: true, default: {} })
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/notifications/services/notification-queue.service.ts b/projects/gamilit/apps/backend/src/modules/notifications/services/notification-queue.service.ts
index 7d12117..d61a647 100644
--- a/projects/gamilit/apps/backend/src/modules/notifications/services/notification-queue.service.ts
+++ b/projects/gamilit/apps/backend/src/modules/notifications/services/notification-queue.service.ts
@@ -347,7 +347,7 @@ export class NotificationQueueService {
             title: notification.title,
             body: notification.message,
             icon: notification.data?.icon as string | undefined,
-            data: notification.data as Record<string, any> | undefined,
+            data: notification.data as Record<string, unknown> | undefined,
           },
         );
 
diff --git a/projects/gamilit/apps/backend/src/modules/notifications/services/notification.service.ts b/projects/gamilit/apps/backend/src/modules/notifications/services/notification.service.ts
index c47df7f..9602b35 100644
--- a/projects/gamilit/apps/backend/src/modules/notifications/services/notification.service.ts
+++ b/projects/gamilit/apps/backend/src/modules/notifications/services/notification.service.ts
@@ -50,8 +50,8 @@ export class NotificationService {
     title: string;
     message: string;
     type: string;
-    data?: Record<string, any>;
-    metadata?: Record<string, any>;
+    data?: Record<string, unknown>;
+    metadata?: Record<string, unknown>;
     priority?: string;
     channels?: string[];
     expiresAt?: Date;
@@ -97,7 +97,7 @@ export class NotificationService {
     variables: Record<string, string>;
     type?: string;
     channels?: string[];
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
   }): Promise<Notification> {
     // 1. Renderizar template
     const rendered = await this.templateService.renderTemplate(
diff --git a/projects/gamilit/apps/backend/src/modules/notifications/services/push-notification.service.ts b/projects/gamilit/apps/backend/src/modules/notifications/services/push-notification.service.ts
index 7159680..8e9bbd6 100644
--- a/projects/gamilit/apps/backend/src/modules/notifications/services/push-notification.service.ts
+++ b/projects/gamilit/apps/backend/src/modules/notifications/services/push-notification.service.ts
@@ -163,7 +163,7 @@ export class PushNotificationService implements OnModuleInit {
       icon?: string;
       badge?: string;
       tag?: string;
-      data?: Record<string, any>;
+      data?: Record<string, unknown>;
     },
   ): Promise<boolean> {
     if (!this.isInitialized) {
@@ -226,7 +226,7 @@ export class PushNotificationService implements OnModuleInit {
       title: string;
       body: string;
       icon?: string;
-      data?: Record<string, any>;
+      data?: Record<string, unknown>;
     },
   ): Promise<boolean> {
     try {
@@ -268,7 +268,7 @@ export class PushNotificationService implements OnModuleInit {
       title: string;
       body: string;
       icon?: string;
-      data?: Record<string, any>;
+      data?: Record<string, unknown>;
     },
   ): Promise<{
     successCount: number;
diff --git a/projects/gamilit/apps/backend/src/modules/progress/controllers/exercise-submission.controller.ts b/projects/gamilit/apps/backend/src/modules/progress/controllers/exercise-submission.controller.ts
index c1baa1b..90560ae 100644
--- a/projects/gamilit/apps/backend/src/modules/progress/controllers/exercise-submission.controller.ts
+++ b/projects/gamilit/apps/backend/src/modules/progress/controllers/exercise-submission.controller.ts
@@ -394,7 +394,7 @@ export class ExerciseSubmissionController {
   async gradeSubmission(
   @Param('id') id: string,
     @Body() gradeDto: GradeSubmissionDto,
-    @Request() req: any,
+    @Request() req: AuthRequest,
   ) {
     // P1-003 FIX: Pass manual grading data to service
     // If final_score is provided, use manual grading. Otherwise, use auto-grading.
@@ -479,7 +479,7 @@ export class ExerciseSubmissionController {
   async provideFeedback(
   @Param('id') id: string,
     @Body() body: { feedback: object },
-    @Request() req: any,
+    @Request() _req: any,
   ) {
     // req.user contains the authenticated teacher's data from JWT
     return this.submissionService.provideFeedback(id, body.feedback);
@@ -625,7 +625,7 @@ export class ExerciseSubmissionController {
     status: 403,
     description: 'Acceso denegado - Se requieren permisos de profesor',
   })
-  async findPendingReview(@Request() req: any) {
+  async findPendingReview(@Request() _req: any) {
     // req.user contains the authenticated teacher's data from JWT
     return this.submissionService.findPendingReview();
   }
@@ -749,7 +749,7 @@ export class ExerciseSubmissionController {
     description: 'Usuario o ejercicio no encontrado',
   })
   async autoSaveProgress(
-  @Request() req: any,
+  @Request() req: AuthRequest,
     @Param('exerciseId') exerciseId: string,
     @Body() dto: AutoSaveProgressDto,
   ) {
@@ -841,7 +841,7 @@ export class ExerciseSubmissionController {
     description: 'Usuario o ejercicio no existe en el sistema',
   })
   async getAutoSavedProgress(
-  @Request() req: any,
+  @Request() req: AuthRequest,
     @Param('exerciseId') exerciseId: string,
   ) {
     // Extraer userId del JWT
diff --git a/projects/gamilit/apps/backend/src/modules/progress/dto/autosave-progress.dto.ts b/projects/gamilit/apps/backend/src/modules/progress/dto/autosave-progress.dto.ts
index 74f155d..5841925 100644
--- a/projects/gamilit/apps/backend/src/modules/progress/dto/autosave-progress.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/progress/dto/autosave-progress.dto.ts
@@ -64,7 +64,7 @@ export class AutoSaveProgressDto {
   @IsObject()
   @Expose({ name: 'partialAnswers' })
   @Transform(({ obj }) => obj.partial_answers || obj.partialAnswers)
-    partial_answers?: Record<string, any>;
+    partial_answers?: Record<string, unknown>;
 
   /**
    * Tiempo transcurrido en el ejercicio (segundos)
@@ -115,5 +115,5 @@ export class AutoSaveProgressDto {
   })
   @IsOptional()
   @IsObject()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/progress/dto/autosave-response.dto.ts b/projects/gamilit/apps/backend/src/modules/progress/dto/autosave-response.dto.ts
index 5ecbf77..23a384e 100644
--- a/projects/gamilit/apps/backend/src/modules/progress/dto/autosave-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/progress/dto/autosave-response.dto.ts
@@ -47,7 +47,7 @@ export class AutoSaveResponseDto {
       question_2: { option: 'A' },
     },
   })
-    partial_answers!: Record<string, any>;
+    partial_answers!: Record<string, unknown>;
 
   /**
    * Tiempo transcurrido guardado
@@ -69,7 +69,7 @@ export class AutoSaveResponseDto {
     },
     required: false,
   })
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 
   /**
    * Fecha de inicio del ejercicio
diff --git a/projects/gamilit/apps/backend/src/modules/progress/dto/create-exercise-attempt.dto.ts b/projects/gamilit/apps/backend/src/modules/progress/dto/create-exercise-attempt.dto.ts
index 02311be..dfe5513 100644
--- a/projects/gamilit/apps/backend/src/modules/progress/dto/create-exercise-attempt.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/progress/dto/create-exercise-attempt.dto.ts
@@ -42,7 +42,7 @@ export class CreateExerciseAttemptDto {
    * Respuestas enviadas (estructura JSONB)
    */
   @IsObject()
-    submitted_answers!: Record<string, any>;
+    submitted_answers!: Record<string, unknown>;
 
   /**
    * Indica si la respuesta fue correcta
@@ -110,5 +110,5 @@ export class CreateExerciseAttemptDto {
    */
   @IsOptional()
   @IsObject()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/progress/dto/create-exercise-submission.dto.ts b/projects/gamilit/apps/backend/src/modules/progress/dto/create-exercise-submission.dto.ts
index d9850c1..99edd31 100644
--- a/projects/gamilit/apps/backend/src/modules/progress/dto/create-exercise-submission.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/progress/dto/create-exercise-submission.dto.ts
@@ -36,7 +36,7 @@ export class CreateExerciseSubmissionDto {
    * Respuesta del estudiante (JSONB)
    */
   @IsObject()
-    answer_data!: Record<string, any>;
+    answer_data!: Record<string, unknown>;
 
   /**
    * Indica si la respuesta fue correcta
diff --git a/projects/gamilit/apps/backend/src/modules/progress/dto/create-learning-session.dto.ts b/projects/gamilit/apps/backend/src/modules/progress/dto/create-learning-session.dto.ts
index 3480e90..8d93255 100644
--- a/projects/gamilit/apps/backend/src/modules/progress/dto/create-learning-session.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/progress/dto/create-learning-session.dto.ts
@@ -77,14 +77,14 @@ export class CreateLearningSessionDto {
    */
   @IsOptional()
   @IsObject()
-    device_info?: Record<string, any>;
+    device_info?: Record<string, unknown>;
 
   /**
    * Información del navegador
    */
   @IsOptional()
   @IsObject()
-    browser_info?: Record<string, any>;
+    browser_info?: Record<string, unknown>;
 
   /**
    * Calidad de conexión
@@ -99,5 +99,5 @@ export class CreateLearningSessionDto {
    */
   @IsOptional()
   @IsObject()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/progress/dto/create-module-progress.dto.ts b/projects/gamilit/apps/backend/src/modules/progress/dto/create-module-progress.dto.ts
index 00947f8..6ab4f7f 100644
--- a/projects/gamilit/apps/backend/src/modules/progress/dto/create-module-progress.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/progress/dto/create-module-progress.dto.ts
@@ -134,5 +134,5 @@ export class CreateModuleProgressDto {
    */
   @IsOptional()
   @IsObject()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/progress/dto/exercise-attempt-response.dto.ts b/projects/gamilit/apps/backend/src/modules/progress/dto/exercise-attempt-response.dto.ts
index 52fa4fa..c604085 100644
--- a/projects/gamilit/apps/backend/src/modules/progress/dto/exercise-attempt-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/progress/dto/exercise-attempt-response.dto.ts
@@ -37,7 +37,7 @@ export class ExerciseAttemptResponseDto {
    * Respuestas enviadas
    */
   @Expose()
-    submitted_answers!: Record<string, any>;
+    submitted_answers!: Record<string, unknown>;
 
   /**
    * Indica si fue correcta
@@ -92,5 +92,5 @@ export class ExerciseAttemptResponseDto {
    * Metadatos
    */
   @Expose()
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/progress/dto/exercise-submission-response.dto.ts b/projects/gamilit/apps/backend/src/modules/progress/dto/exercise-submission-response.dto.ts
index 8c4d494..bd817fe 100644
--- a/projects/gamilit/apps/backend/src/modules/progress/dto/exercise-submission-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/progress/dto/exercise-submission-response.dto.ts
@@ -31,7 +31,7 @@ export class ExerciseSubmissionResponseDto {
    * Respuesta del estudiante
    */
   @Expose()
-    answer_data!: Record<string, any>;
+    answer_data!: Record<string, unknown>;
 
   /**
    * Indica si fue correcta
diff --git a/projects/gamilit/apps/backend/src/modules/progress/dto/learning-session-response.dto.ts b/projects/gamilit/apps/backend/src/modules/progress/dto/learning-session-response.dto.ts
index 036b1a8..312d4db 100644
--- a/projects/gamilit/apps/backend/src/modules/progress/dto/learning-session-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/progress/dto/learning-session-response.dto.ts
@@ -147,13 +147,13 @@ export class LearningSessionResponseDto {
    * Información del dispositivo
    */
   @Expose()
-    device_info!: Record<string, any>;
+    device_info!: Record<string, unknown>;
 
   /**
    * Información del navegador
    */
   @Expose()
-    browser_info!: Record<string, any>;
+    browser_info!: Record<string, unknown>;
 
   /**
    * Calidad de conexión
@@ -183,7 +183,7 @@ export class LearningSessionResponseDto {
    * Metadatos
    */
   @Expose()
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   /**
    * Fecha de creación
diff --git a/projects/gamilit/apps/backend/src/modules/progress/dto/module-progress-response.dto.ts b/projects/gamilit/apps/backend/src/modules/progress/dto/module-progress-response.dto.ts
index c8e9f6b..525f280 100644
--- a/projects/gamilit/apps/backend/src/modules/progress/dto/module-progress-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/progress/dto/module-progress-response.dto.ts
@@ -198,13 +198,13 @@ export class ModuleProgressResponseDto {
    * Analíticas de rendimiento
    */
   @Expose()
-    performance_analytics!: Record<string, any>;
+    performance_analytics!: Record<string, unknown>;
 
   /**
    * Observaciones del sistema
    */
   @Expose()
-    system_observations!: Record<string, any>;
+    system_observations!: Record<string, unknown>;
 
   /**
    * Notas del estudiante
@@ -222,7 +222,7 @@ export class ModuleProgressResponseDto {
    * Metadatos
    */
   @Expose()
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   /**
    * Fecha de creación
diff --git a/projects/gamilit/apps/backend/src/modules/progress/dto/recent-activity.dto.ts b/projects/gamilit/apps/backend/src/modules/progress/dto/recent-activity.dto.ts
index f500ffe..29249b6 100644
--- a/projects/gamilit/apps/backend/src/modules/progress/dto/recent-activity.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/progress/dto/recent-activity.dto.ts
@@ -55,6 +55,6 @@ export interface RecentActivityDto {
   entity_type: 'module' | 'exercise' | 'achievement' | 'level' | 'session';
   entity_id: string;
   entity_name: string;
-  metadata?: Record<string, any>;
+  metadata?: Record<string, unknown>;
   created_at: Date;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/progress/entities/exercise-attempt.entity.ts b/projects/gamilit/apps/backend/src/modules/progress/entities/exercise-attempt.entity.ts
index 4f6a9a3..1752ab2 100644
--- a/projects/gamilit/apps/backend/src/modules/progress/entities/exercise-attempt.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/progress/entities/exercise-attempt.entity.ts
@@ -65,7 +65,7 @@ export class ExerciseAttempt {
    * Estructura varía según tipo de ejercicio
    */
   @Column({ type: 'jsonb' })
-    submitted_answers!: Record<string, any>;
+    submitted_answers!: Record<string, unknown>;
 
   // =====================================================
   // RESULTS & SCORING
@@ -144,5 +144,5 @@ export class ExerciseAttempt {
     type: 'jsonb',
     default: { browser: null, device_type: null, response_pattern: [] },
   })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/progress/entities/exercise-submission.entity.ts b/projects/gamilit/apps/backend/src/modules/progress/entities/exercise-submission.entity.ts
index 562bb99..1e4abee 100644
--- a/projects/gamilit/apps/backend/src/modules/progress/entities/exercise-submission.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/progress/entities/exercise-submission.entity.ts
@@ -61,7 +61,7 @@ export class ExerciseSubmission {
    * Estructura varía según tipo de ejercicio
    */
   @Column({ type: 'jsonb' })
-    answer_data!: Record<string, any>;
+    answer_data!: Record<string, unknown>;
 
   // =====================================================
   // RESULTS & SCORING
diff --git a/projects/gamilit/apps/backend/src/modules/progress/entities/learning-session.entity.ts b/projects/gamilit/apps/backend/src/modules/progress/entities/learning-session.entity.ts
index 47e6061..fea9419 100644
--- a/projects/gamilit/apps/backend/src/modules/progress/entities/learning-session.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/progress/entities/learning-session.entity.ts
@@ -194,14 +194,14 @@ export class LearningSession {
    * Ejemplo: { type: 'mobile', os: 'iOS', model: 'iPhone 12' }
    */
   @Column({ type: 'jsonb', default: {} })
-    device_info: Record<string, any> = {};
+    device_info: Record<string, unknown> = {};
 
   /**
    * Información del navegador (JSONB)
    * Ejemplo: { name: 'Chrome', version: '96.0.4664.110' }
    */
   @Column({ type: 'jsonb', default: {} })
-    browser_info!: Record<string, any>;
+    browser_info!: Record<string, unknown>;
 
   /**
    * Calidad de conexión
@@ -245,7 +245,7 @@ export class LearningSession {
    * Metadatos adicionales en formato JSON
    */
   @Column({ type: 'jsonb', default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   /**
    * Fecha y hora de creación del registro
diff --git a/projects/gamilit/apps/backend/src/modules/progress/entities/manual-review.entity.ts b/projects/gamilit/apps/backend/src/modules/progress/entities/manual-review.entity.ts
index be0183a..5c2f691 100644
--- a/projects/gamilit/apps/backend/src/modules/progress/entities/manual-review.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/progress/entities/manual-review.entity.ts
@@ -82,7 +82,7 @@ export class ManualReview {
    * Estructura flexible según necesidades del ejercicio
    */
   @Column({ name: 'detailed_feedback', type: 'jsonb', nullable: true })
-    detailedFeedback?: Record<string, any> | null;
+    detailedFeedback?: Record<string, unknown> | null;
 
   // =====================================================
   // STATUS & WORKFLOW
diff --git a/projects/gamilit/apps/backend/src/modules/progress/entities/module-progress.entity.ts b/projects/gamilit/apps/backend/src/modules/progress/entities/module-progress.entity.ts
index c6eebd5..725c5d5 100644
--- a/projects/gamilit/apps/backend/src/modules/progress/entities/module-progress.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/progress/entities/module-progress.entity.ts
@@ -272,13 +272,13 @@ export class ModuleProgress {
    * Analíticas de rendimiento (JSONB)
    */
   @Column({ type: 'jsonb', default: {} })
-    performance_analytics!: Record<string, any>;
+    performance_analytics!: Record<string, unknown>;
 
   /**
    * Observaciones del sistema (JSONB)
    */
   @Column({ type: 'jsonb', default: {} })
-    system_observations: Record<string, any> = {};
+    system_observations: Record<string, unknown> = {};
 
   // =====================================================
   // NOTES & FEEDBACK
@@ -304,7 +304,7 @@ export class ModuleProgress {
    * Metadatos adicionales en formato JSON
    */
   @Column({ type: 'jsonb', default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   /**
    * Fecha y hora de creación del registro
diff --git a/projects/gamilit/apps/backend/src/modules/progress/entities/progress-snapshot.entity.ts b/projects/gamilit/apps/backend/src/modules/progress/entities/progress-snapshot.entity.ts
index b4778c3..f60c35b 100644
--- a/projects/gamilit/apps/backend/src/modules/progress/entities/progress-snapshot.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/progress/entities/progress-snapshot.entity.ts
@@ -62,7 +62,7 @@ export class ProgressSnapshot {
    * }
    */
   @Column({ type: 'jsonb' })
-    snapshot_data!: Record<string, any>;
+    snapshot_data!: Record<string, unknown>;
 
   /**
    * Total de módulos completados hasta esta fecha
diff --git a/projects/gamilit/apps/backend/src/modules/progress/entities/skill-assessment.entity.ts b/projects/gamilit/apps/backend/src/modules/progress/entities/skill-assessment.entity.ts
index 4019f3c..b6baaeb 100644
--- a/projects/gamilit/apps/backend/src/modules/progress/entities/skill-assessment.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/progress/entities/skill-assessment.entity.ts
@@ -97,7 +97,7 @@ export class SkillAssessment {
    * }
    */
   @Column({ type: 'jsonb', nullable: true })
-    evidence?: Record<string, any>;
+    evidence?: Record<string, unknown>;
 
   /**
    * Fecha y hora de creación
diff --git a/projects/gamilit/apps/backend/src/modules/progress/services/exercise-attempt.service.ts b/projects/gamilit/apps/backend/src/modules/progress/services/exercise-attempt.service.ts
index 521e668..1c3293f 100644
--- a/projects/gamilit/apps/backend/src/modules/progress/services/exercise-attempt.service.ts
+++ b/projects/gamilit/apps/backend/src/modules/progress/services/exercise-attempt.service.ts
@@ -144,7 +144,7 @@ export class ExerciseAttemptService {
    */
   async submitAttempt(
     id: string,
-    answers: Record<string, any>,
+    answers: Record<string, unknown>,
   ): Promise<ExerciseAttempt> {
     const attempt = await this.attemptRepo.findOne({ where: { id } });
 
@@ -156,7 +156,7 @@ export class ExerciseAttemptService {
     attempt.submitted_at = new Date();
 
     // FE-059: Use SQL validate_and_audit() for scoring (replaces placeholder)
-    const { score, isCorrect, _feedback, _details, auditId } = await this.calculateScore(
+    const { score, isCorrect, feedback: _feedback, details: _details, auditId } = await this.calculateScore(
       attempt.user_id,
       attempt.exercise_id,
       answers,
@@ -222,7 +222,7 @@ export class ExerciseAttemptService {
   private async calculateScore(
     userId: string,
     exerciseId: string,
-    answers: Record<string, any>,
+    answers: Record<string, unknown>,
     attemptNumber: number,
   ): Promise<{
       score: number;
diff --git a/projects/gamilit/apps/backend/src/modules/progress/services/exercise-submission.service.ts b/projects/gamilit/apps/backend/src/modules/progress/services/exercise-submission.service.ts
index 6bc3bac..0816b0d 100644
--- a/projects/gamilit/apps/backend/src/modules/progress/services/exercise-submission.service.ts
+++ b/projects/gamilit/apps/backend/src/modules/progress/services/exercise-submission.service.ts
@@ -205,7 +205,7 @@ export class ExerciseSubmissionService {
   async submitExercise(
     userId: string,
     exerciseId: string,
-    answers: Record<string, any>,
+    answers: Record<string, unknown>,
   ): Promise<ExerciseSubmission> {
     // CRITICAL FIX: Convert auth.users.id → profiles.id
     // exercise_submissions.user_id FK references profiles.id (NOT auth.users.id)
@@ -466,9 +466,9 @@ export class ExerciseSubmissionService {
   private async autoGrade(
     userId: string,
     exerciseId: string,
-    answerData: Record<string, any>,
+    answerData: Record<string, unknown>,
     attemptNumber: number = 1,
-    clientMetadata: Record<string, any> = {},
+    clientMetadata: Record<string, unknown> = {},
   ): Promise<{
       score: number;
       isCorrect: boolean;
@@ -611,7 +611,7 @@ export class ExerciseSubmissionService {
    */
   async provideFeedback(
     id: string,
-    feedback: Record<string, any>,
+    feedback: Record<string, unknown>,
   ): Promise<ExerciseSubmission> {
     const submission = await this.submissionRepo.findOne({ where: { id } });
 
@@ -1080,7 +1080,7 @@ export class ExerciseSubmissionService {
       }
 
       return 1.00; // Default si no encuentra
-    } catch (_error) {
+    } catch {
       console.warn(`[getRankXpMultiplier] Error getting multiplier for user ${userId}, using 1.00`);
       return 1.00;
     }
@@ -1318,9 +1318,9 @@ export class ExerciseSubmissionService {
   async autoSaveProgress(
     userId: string,
     exerciseId: string,
-    partialAnswers?: Record<string, any>,
+    partialAnswers?: Record<string, unknown>,
     timeSpentSeconds?: number,
-    metadata?: Record<string, any>,
+    metadata?: Record<string, unknown>,
   ): Promise<ExerciseSubmission> {
     // Convert auth.users.id → profiles.id
     const profileId = await this.getProfileId(userId);
@@ -1416,7 +1416,7 @@ export class ExerciseSubmissionService {
   async convertDraftToFinalSubmission(
     userId: string,
     exerciseId: string,
-    finalAnswers: Record<string, any>,
+    finalAnswers: Record<string, unknown>,
   ): Promise<ExerciseSubmission> {
     // Buscar draft existente
     const draft = await this.getAutoSavedProgress(userId, exerciseId);
diff --git a/projects/gamilit/apps/backend/src/modules/progress/services/scheduled-mission.service.ts b/projects/gamilit/apps/backend/src/modules/progress/services/scheduled-mission.service.ts
index 6fcddeb..363c3ec 100644
--- a/projects/gamilit/apps/backend/src/modules/progress/services/scheduled-mission.service.ts
+++ b/projects/gamilit/apps/backend/src/modules/progress/services/scheduled-mission.service.ts
@@ -61,7 +61,7 @@ export class ScheduledMissionService {
    * @returns Lista de misiones del estudiante
    * @note Este método requiere conocer las aulas del usuario, se debe integrar con ClassroomService
    */
-  async findByUserId(userId: string): Promise<ScheduledMission[]> {
+  async findByUserId(_userId: string): Promise<ScheduledMission[]> {
     // TODO: Integrar con ClassroomService para obtener classrooms del usuario
     // Por ahora, retornar todas las misiones activas como placeholder
     return this.scheduledMissionRepo.find({
@@ -92,7 +92,7 @@ export class ScheduledMissionService {
    * @param userId - ID del usuario
    * @returns Lista de misiones próximas
    */
-  async findUpcoming(userId: string): Promise<ScheduledMission[]> {
+  async findUpcoming(_userId: string): Promise<ScheduledMission[]> {
     const now = new Date();
 
     // TODO: Filtrar por classrooms del usuario
diff --git a/projects/gamilit/apps/backend/src/modules/social/controllers/schools.controller.ts b/projects/gamilit/apps/backend/src/modules/social/controllers/schools.controller.ts
index 2abeb41..08af4ba 100644
--- a/projects/gamilit/apps/backend/src/modules/social/controllers/schools.controller.ts
+++ b/projects/gamilit/apps/backend/src/modules/social/controllers/schools.controller.ts
@@ -469,7 +469,7 @@ export class SchoolsController {
   })
   async updateSettings(
   @Param('id') id: string,
-    @Body() settings: Record<string, any>,
+    @Body() settings: Record<string, unknown>,
   ) {
     return this.schoolsService.updateSettings(id, settings);
   }
diff --git a/projects/gamilit/apps/backend/src/modules/social/dto/activity-response.dto.ts b/projects/gamilit/apps/backend/src/modules/social/dto/activity-response.dto.ts
index 2ea59bb..3f0bfc9 100644
--- a/projects/gamilit/apps/backend/src/modules/social/dto/activity-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/social/dto/activity-response.dto.ts
@@ -43,7 +43,7 @@ export class ActivityResponseDto {
    * Metadatos adicionales
    */
   @Expose()
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   /**
    * Visibilidad de la actividad
diff --git a/projects/gamilit/apps/backend/src/modules/social/dto/classroom-member-response.dto.ts b/projects/gamilit/apps/backend/src/modules/social/dto/classroom-member-response.dto.ts
index cf4e786..30d0da9 100644
--- a/projects/gamilit/apps/backend/src/modules/social/dto/classroom-member-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/social/dto/classroom-member-response.dto.ts
@@ -87,7 +87,7 @@ export class ClassroomMemberResponseDto {
    * Permisos especiales del estudiante
    */
   @Expose()
-    permissions!: Record<string, any>;
+    permissions!: Record<string, unknown>;
 
   /**
    * Notas del profesor
@@ -99,13 +99,13 @@ export class ClassroomMemberResponseDto {
    * Información de contacto de padres
    */
   @Expose()
-    parent_contact_info!: Record<string, any>;
+    parent_contact_info!: Record<string, unknown>;
 
   /**
    * Metadatos adicionales
    */
   @Expose()
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   /**
    * Membresía activa
diff --git a/projects/gamilit/apps/backend/src/modules/social/dto/classroom-response.dto.ts b/projects/gamilit/apps/backend/src/modules/social/dto/classroom-response.dto.ts
index 4e68a39..65f8101 100644
--- a/projects/gamilit/apps/backend/src/modules/social/dto/classroom-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/social/dto/classroom-response.dto.ts
@@ -103,7 +103,7 @@ export class ClassroomResponseDto {
    * Configuraciones del aula
    */
   @Expose()
-    settings!: Record<string, any>;
+    settings!: Record<string, unknown>;
 
   /**
    * Horario de clases
@@ -147,7 +147,7 @@ export class ClassroomResponseDto {
    * Metadatos adicionales
    */
   @Expose()
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   /**
    * Fecha de creación
diff --git a/projects/gamilit/apps/backend/src/modules/social/dto/create-activity.dto.ts b/projects/gamilit/apps/backend/src/modules/social/dto/create-activity.dto.ts
index 5b296b6..62ffc43 100644
--- a/projects/gamilit/apps/backend/src/modules/social/dto/create-activity.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/social/dto/create-activity.dto.ts
@@ -60,7 +60,7 @@ export class CreateActivityDto {
    */
   @IsOptional()
   @IsObject()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 
   /**
    * Visibilidad de la actividad (opcional, por defecto true)
diff --git a/projects/gamilit/apps/backend/src/modules/social/dto/create-classroom-member.dto.ts b/projects/gamilit/apps/backend/src/modules/social/dto/create-classroom-member.dto.ts
index f2fb9eb..aff479e 100644
--- a/projects/gamilit/apps/backend/src/modules/social/dto/create-classroom-member.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/social/dto/create-classroom-member.dto.ts
@@ -94,7 +94,7 @@ export class CreateClassroomMemberDto {
    */
   @IsOptional()
   @IsObject()
-    permissions?: Record<string, any>;
+    permissions?: Record<string, unknown>;
 
   /**
    * Notas del profesor
@@ -108,14 +108,14 @@ export class CreateClassroomMemberDto {
    */
   @IsOptional()
   @IsObject()
-    parent_contact_info?: Record<string, any>;
+    parent_contact_info?: Record<string, unknown>;
 
   /**
    * Metadatos adicionales
    */
   @IsOptional()
   @IsObject()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 
   /**
    * Membresía activa
diff --git a/projects/gamilit/apps/backend/src/modules/social/dto/create-classroom.dto.ts b/projects/gamilit/apps/backend/src/modules/social/dto/create-classroom.dto.ts
index f65bf28..bfa8768 100644
--- a/projects/gamilit/apps/backend/src/modules/social/dto/create-classroom.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/social/dto/create-classroom.dto.ts
@@ -114,7 +114,7 @@ export class CreateClassroomDto {
    */
   @IsOptional()
   @IsObject()
-    settings?: Record<string, any>;
+    settings?: Record<string, unknown>;
 
   /**
    * Horario de clases
@@ -163,5 +163,5 @@ export class CreateClassroomDto {
    */
   @IsOptional()
   @IsObject()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/social/dto/create-peer-challenge.dto.ts b/projects/gamilit/apps/backend/src/modules/social/dto/create-peer-challenge.dto.ts
index 333bf5b..0b3b30c 100644
--- a/projects/gamilit/apps/backend/src/modules/social/dto/create-peer-challenge.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/social/dto/create-peer-challenge.dto.ts
@@ -174,7 +174,7 @@ export class CreatePeerChallengeDto {
   })
   @IsOptional()
   @IsObject()
-    rewards?: Record<string, any>;
+    rewards?: Record<string, unknown>;
 
   /**
    * Multiplicador de bonus para el ganador
@@ -236,7 +236,7 @@ export class CreatePeerChallengeDto {
   })
   @IsOptional()
   @IsObject()
-    custom_rules?: Record<string, any>;
+    custom_rules?: Record<string, unknown>;
 
   /**
    * Metadatos adicionales (JSONB)
@@ -246,5 +246,5 @@ export class CreatePeerChallengeDto {
   })
   @IsOptional()
   @IsObject()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/social/dto/create-school.dto.ts b/projects/gamilit/apps/backend/src/modules/social/dto/create-school.dto.ts
index 848154a..9fc843c 100644
--- a/projects/gamilit/apps/backend/src/modules/social/dto/create-school.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/social/dto/create-school.dto.ts
@@ -148,7 +148,7 @@ export class CreateSchoolDto {
    */
   @IsOptional()
   @IsObject()
-    settings?: Record<string, any>;
+    settings?: Record<string, unknown>;
 
   /**
    * Capacidad máxima de estudiantes
@@ -185,5 +185,5 @@ export class CreateSchoolDto {
    */
   @IsOptional()
   @IsObject()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/social/dto/create-team.dto.ts b/projects/gamilit/apps/backend/src/modules/social/dto/create-team.dto.ts
index c218aeb..23afb4e 100644
--- a/projects/gamilit/apps/backend/src/modules/social/dto/create-team.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/social/dto/create-team.dto.ts
@@ -162,5 +162,5 @@ export class CreateTeamDto {
    */
   @IsOptional()
   @IsObject()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/social/dto/school-response.dto.ts b/projects/gamilit/apps/backend/src/modules/social/dto/school-response.dto.ts
index 9986fd4..12bbaff 100644
--- a/projects/gamilit/apps/backend/src/modules/social/dto/school-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/social/dto/school-response.dto.ts
@@ -127,7 +127,7 @@ export class SchoolResponseDto {
    * Configuraciones adicionales
    */
   @Expose()
-    settings!: Record<string, any>;
+    settings!: Record<string, unknown>;
 
   /**
    * Capacidad máxima de estudiantes
@@ -169,7 +169,7 @@ export class SchoolResponseDto {
    * Metadatos adicionales
    */
   @Expose()
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   /**
    * Fecha de creación
diff --git a/projects/gamilit/apps/backend/src/modules/social/dto/team-response.dto.ts b/projects/gamilit/apps/backend/src/modules/social/dto/team-response.dto.ts
index d15f0ef..d2f4e7d 100644
--- a/projects/gamilit/apps/backend/src/modules/social/dto/team-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/social/dto/team-response.dto.ts
@@ -177,7 +177,7 @@ export class TeamResponseDto {
    * Metadatos adicionales
    */
   @Expose()
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   /**
    * Fecha de creación
diff --git a/projects/gamilit/apps/backend/src/modules/social/dto/update-peer-challenge.dto.ts b/projects/gamilit/apps/backend/src/modules/social/dto/update-peer-challenge.dto.ts
index 01870c6..aca7fb0 100644
--- a/projects/gamilit/apps/backend/src/modules/social/dto/update-peer-challenge.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/social/dto/update-peer-challenge.dto.ts
@@ -98,7 +98,7 @@ export class UpdatePeerChallengeDto {
   })
   @IsOptional()
   @IsObject()
-    rewards?: Record<string, any>;
+    rewards?: Record<string, unknown>;
 
   /**
    * Multiplicador de bonus para el ganador
@@ -122,7 +122,7 @@ export class UpdatePeerChallengeDto {
   })
   @IsOptional()
   @IsObject()
-    custom_rules?: Record<string, any>;
+    custom_rules?: Record<string, unknown>;
 
   /**
    * Metadatos adicionales
@@ -132,5 +132,5 @@ export class UpdatePeerChallengeDto {
   })
   @IsOptional()
   @IsObject()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/social/entities/challenge-participant.entity.ts b/projects/gamilit/apps/backend/src/modules/social/entities/challenge-participant.entity.ts
index e07232f..265d177 100644
--- a/projects/gamilit/apps/backend/src/modules/social/entities/challenge-participant.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/social/entities/challenge-participant.entity.ts
@@ -181,7 +181,7 @@ export class ChallengeParticipant {
    * Metadatos adicionales en formato JSONB
    */
   @Column({ type: 'jsonb', default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   // =====================================================
   // Relaciones
diff --git a/projects/gamilit/apps/backend/src/modules/social/entities/classroom-member.entity.ts b/projects/gamilit/apps/backend/src/modules/social/entities/classroom-member.entity.ts
index 8165b85..4cba7d8 100644
--- a/projects/gamilit/apps/backend/src/modules/social/entities/classroom-member.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/social/entities/classroom-member.entity.ts
@@ -153,7 +153,7 @@ export class ClassroomMember {
    * Ejemplo: { can_post: true, can_comment: true, can_view_others: true }
    */
   @Column({ type: 'jsonb', default: {} })
-    permissions: Record<string, any> = {};
+    permissions: Record<string, unknown> = {};
 
   // =====================================================
   // NOTES & COMMENTS
@@ -170,7 +170,7 @@ export class ClassroomMember {
    * Ejemplo: { parent_name: "...", phone: "...", email: "..." }
    */
   @Column({ type: 'jsonb', default: {} })
-    parent_contact_info!: Record<string, any>;
+    parent_contact_info!: Record<string, unknown>;
 
   // =====================================================
   // METADATA & FLAGS
@@ -180,7 +180,7 @@ export class ClassroomMember {
    * Metadatos adicionales en formato JSON
    */
   @Column({ type: 'jsonb', default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   /**
    * Flag de membresía activa
diff --git a/projects/gamilit/apps/backend/src/modules/social/entities/classroom.entity.ts b/projects/gamilit/apps/backend/src/modules/social/entities/classroom.entity.ts
index 0847ae9..0d9f071 100644
--- a/projects/gamilit/apps/backend/src/modules/social/entities/classroom.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/social/entities/classroom.entity.ts
@@ -159,7 +159,7 @@ export class Classroom {
       allow_self_enrollment: false,
     },
   })
-    settings!: Record<string, any>;
+    settings!: Record<string, unknown>;
 
   /**
    * Horario de clases en formato JSON (array de objetos)
@@ -214,7 +214,7 @@ export class Classroom {
    * Metadatos adicionales en formato JSON
    */
   @Column({ type: 'jsonb', default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   /**
    * Fecha y hora de creación del registro
diff --git a/projects/gamilit/apps/backend/src/modules/social/entities/peer-challenge.entity.ts b/projects/gamilit/apps/backend/src/modules/social/entities/peer-challenge.entity.ts
index ca0952f..479e84c 100644
--- a/projects/gamilit/apps/backend/src/modules/social/entities/peer-challenge.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/social/entities/peer-challenge.entity.ts
@@ -149,7 +149,7 @@ export class PeerChallenge {
    * @example { "xp": 100, "ml_coins": 50, "achievement_id": "uuid" }
    */
   @Column({ type: 'jsonb', default: {} })
-    rewards!: Record<string, any>;
+    rewards!: Record<string, unknown>;
 
   /**
    * Multiplicador de bonus para el ganador
@@ -180,7 +180,7 @@ export class PeerChallenge {
    * Reglas personalizadas en formato JSONB
    */
   @Column({ type: 'jsonb', default: {} })
-    custom_rules!: Record<string, any>;
+    custom_rules!: Record<string, unknown>;
 
   /**
    * Fecha y hora de creación
@@ -210,7 +210,7 @@ export class PeerChallenge {
    * Metadatos adicionales en formato JSONB
    */
   @Column({ type: 'jsonb', default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   // =====================================================
   // Relaciones
diff --git a/projects/gamilit/apps/backend/src/modules/social/entities/school.entity.ts b/projects/gamilit/apps/backend/src/modules/social/entities/school.entity.ts
index 8d249fb..4b4bca9 100644
--- a/projects/gamilit/apps/backend/src/modules/social/entities/school.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/social/entities/school.entity.ts
@@ -169,7 +169,7 @@ export class School {
    * Configuraciones adicionales en formato JSON
    */
   @Column({ type: 'jsonb', default: {} })
-    settings!: Record<string, any>;
+    settings!: Record<string, unknown>;
 
   // =====================================================
   // CAPACITY & STATS
@@ -223,7 +223,7 @@ export class School {
    * Metadatos adicionales en formato JSON
    */
   @Column({ type: 'jsonb', default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   /**
    * Fecha y hora de creación del registro
diff --git a/projects/gamilit/apps/backend/src/modules/social/entities/team.entity.ts b/projects/gamilit/apps/backend/src/modules/social/entities/team.entity.ts
index 8dd2fab..a0009fb 100644
--- a/projects/gamilit/apps/backend/src/modules/social/entities/team.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/social/entities/team.entity.ts
@@ -245,7 +245,7 @@ export class Team {
    * Metadatos adicionales en formato JSON
    */
   @Column({ type: 'jsonb', default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   /**
    * Fecha y hora de creación del registro
diff --git a/projects/gamilit/apps/backend/src/modules/social/entities/user-activity.entity.ts b/projects/gamilit/apps/backend/src/modules/social/entities/user-activity.entity.ts
index 79e26e9..a35802a 100644
--- a/projects/gamilit/apps/backend/src/modules/social/entities/user-activity.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/social/entities/user-activity.entity.ts
@@ -76,7 +76,7 @@ export class UserActivity {
    * - { challengeId: 'uuid' }
    */
   @Column({ type: 'jsonb', default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   /**
    * Indica si la actividad es visible para amigos
diff --git a/projects/gamilit/apps/backend/src/modules/social/services/classrooms.service.ts b/projects/gamilit/apps/backend/src/modules/social/services/classrooms.service.ts
index eb3a263..27a470a 100644
--- a/projects/gamilit/apps/backend/src/modules/social/services/classrooms.service.ts
+++ b/projects/gamilit/apps/backend/src/modules/social/services/classrooms.service.ts
@@ -237,7 +237,7 @@ export class ClassroomsService {
    * @throws NotFoundException si el aula no existe
    * @throws BadRequestException si el aula está llena
    */
-  async enrollStudent(classroomId: string: string): Promise<Classroom> {
+  async enrollStudent(classroomId: string, _studentId: string): Promise<Classroom> {
     const classroom = await this.classroomRepo.findOne({ where: { id: classroomId } });
 
     if (!classroom) {
@@ -261,7 +261,7 @@ export class ClassroomsService {
    * @returns Aula actualizada
    * @throws NotFoundException si el aula no existe
    */
-  async removeStudent(classroomId: string: string): Promise<Classroom> {
+  async removeStudent(classroomId: string, _studentId: string): Promise<Classroom> {
     const classroom = await this.classroomRepo.findOne({ where: { id: classroomId } });
 
     if (!classroom) {
diff --git a/projects/gamilit/apps/backend/src/modules/social/services/schools.service.ts b/projects/gamilit/apps/backend/src/modules/social/services/schools.service.ts
index 9d1f9f5..4b9e79d 100644
--- a/projects/gamilit/apps/backend/src/modules/social/services/schools.service.ts
+++ b/projects/gamilit/apps/backend/src/modules/social/services/schools.service.ts
@@ -191,7 +191,7 @@ export class SchoolsService {
    */
   async updateSettings(
     id: string,
-    settings: Record<string, any>,
+    settings: Record<string, unknown>,
   ): Promise<School> {
     const school = await this.schoolRepo.findOne({ where: { id } });
 
diff --git a/projects/gamilit/apps/backend/src/modules/social/services/teams.service.ts b/projects/gamilit/apps/backend/src/modules/social/services/teams.service.ts
index 98c1d7b..c8d5fb3 100644
--- a/projects/gamilit/apps/backend/src/modules/social/services/teams.service.ts
+++ b/projects/gamilit/apps/backend/src/modules/social/services/teams.service.ts
@@ -164,7 +164,7 @@ export class TeamsService {
    * @throws NotFoundException si el equipo no existe
    * @throws BadRequestException si el equipo está lleno
    */
-  async addMember(teamId: string: string): Promise<Team> {
+  async addMember(teamId: string, _userId: string): Promise<Team> {
     const team = await this.teamRepo.findOne({ where: { id: teamId } });
 
     if (!team) {
@@ -189,7 +189,7 @@ export class TeamsService {
    * @returns Equipo actualizado
    * @throws NotFoundException si el equipo no existe
    */
-  async removeMember(teamId: string: string): Promise<Team> {
+  async removeMember(teamId: string, _userId: string): Promise<Team> {
     const team = await this.teamRepo.findOne({ where: { id: teamId } });
 
     if (!team) {
diff --git a/projects/gamilit/apps/backend/src/modules/tasks/services/missions-cron.service.ts b/projects/gamilit/apps/backend/src/modules/tasks/services/missions-cron.service.ts
index 3fb5601..7111d84 100644
--- a/projects/gamilit/apps/backend/src/modules/tasks/services/missions-cron.service.ts
+++ b/projects/gamilit/apps/backend/src/modules/tasks/services/missions-cron.service.ts
@@ -222,7 +222,8 @@ export class MissionsCronService {
     try {
       const job = this.schedulerRegistry.getCronJob(jobName);
       return (job as any).running ?? false;
-    } catch () {
+      // eslint-disable-next-line @typescript-eslint/no-unused-vars
+    } catch (_error) {
       this.logger.warn(`Could not find job ${jobName} in registry`);
       return false;
     }
diff --git a/projects/gamilit/apps/backend/src/modules/teacher/controllers/exercise-responses.controller.ts b/projects/gamilit/apps/backend/src/modules/teacher/controllers/exercise-responses.controller.ts
index 1d4d64c..2d4507e 100644
--- a/projects/gamilit/apps/backend/src/modules/teacher/controllers/exercise-responses.controller.ts
+++ b/projects/gamilit/apps/backend/src/modules/teacher/controllers/exercise-responses.controller.ts
@@ -90,7 +90,7 @@ export class ExerciseResponsesController {
   })
   async getAttempts(
     @Query() query: GetAttemptsQueryDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<AttemptsListResponseDto> {
     const userId = req.user.id;
 
@@ -133,7 +133,7 @@ export class ExerciseResponsesController {
   })
   async getAttemptDetail(
     @Param('id') id: string,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<AttemptDetailDto> {
     const userId = req.user.id;
 
@@ -175,7 +175,7 @@ export class ExerciseResponsesController {
   })
   async getAttemptsByStudent(
     @Param('studentId') studentId: string,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<AttemptResponseDto[]> {
     const userId = req.user.id;
 
@@ -213,7 +213,7 @@ export class ExerciseResponsesController {
   })
   async getExerciseResponses(
     @Param('exerciseId') exerciseId: string,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<AttemptsListResponseDto> {
     const userId = req.user.id;
 
diff --git a/projects/gamilit/apps/backend/src/modules/teacher/controllers/manual-review.controller.ts b/projects/gamilit/apps/backend/src/modules/teacher/controllers/manual-review.controller.ts
index b8076fd..96110e6 100644
--- a/projects/gamilit/apps/backend/src/modules/teacher/controllers/manual-review.controller.ts
+++ b/projects/gamilit/apps/backend/src/modules/teacher/controllers/manual-review.controller.ts
@@ -51,7 +51,7 @@ export class ManualReviewController {
     description: 'Lista de reviews pendientes con submissions',
     type: [ManualReview],
   })
-  async getPendingReviews(@Request() req: any): Promise<ManualReview[]> {
+  async getPendingReviews(@Request() req: AuthRequest): Promise<ManualReview[]> {
     const teacherId = req.user.profileId;
     return this.reviewService.findPendingReviews(teacherId);
   }
@@ -74,7 +74,7 @@ export class ManualReviewController {
     type: [ManualReview],
   })
   async getMyReviews(
-    @Request() req: any,
+    @Request() req: AuthRequest,
     @Query('status') status?: 'pending' | 'in_progress' | 'completed' | 'returned',
   ): Promise<ManualReview[]> {
     const teacherId = req.user.profileId;
@@ -111,7 +111,7 @@ export class ManualReviewController {
   @ApiResponse({ status: 400, description: 'Datos inválidos o review duplicado' })
   @ApiResponse({ status: 404, description: 'Submission no encontrado' })
   async createReview(
-    @Request() req: any,
+    @Request() req: AuthRequest,
     @Body() dto: CreateReviewDto,
   ): Promise<ManualReview> {
     const teacherId = req.user.profileId;
diff --git a/projects/gamilit/apps/backend/src/modules/teacher/controllers/teacher-classrooms.controller.ts b/projects/gamilit/apps/backend/src/modules/teacher/controllers/teacher-classrooms.controller.ts
index 84a469a..c300039 100644
--- a/projects/gamilit/apps/backend/src/modules/teacher/controllers/teacher-classrooms.controller.ts
+++ b/projects/gamilit/apps/backend/src/modules/teacher/controllers/teacher-classrooms.controller.ts
@@ -117,7 +117,7 @@ export class TeacherClassroomsController {
   })
   async getClassrooms(
     @Query() query: GetClassroomsQueryDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<PaginatedTeacherClassroomsResponseDto> {
     const teacherId = req.user.sub;
     return this.classroomsCrudService.getClassrooms(teacherId, query);
@@ -152,7 +152,7 @@ export class TeacherClassroomsController {
   })
   async createClassroom(
     @Body() dto: CreateTeacherClassroomDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<TeacherClassroomResponseDto> {
     const teacherId = req.user.sub;
     return this.classroomsCrudService.createClassroom(teacherId, dto);
@@ -192,7 +192,7 @@ export class TeacherClassroomsController {
   })
   async getClassroomById(
     @Param('id') id: string,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<TeacherClassroomDetailResponseDto> {
     const teacherId = req.user.sub;
     return this.classroomsCrudService.getClassroomById(id, teacherId);
@@ -238,7 +238,7 @@ export class TeacherClassroomsController {
   async updateClassroom(
     @Param('id') id: string,
       @Body() dto: UpdateTeacherClassroomDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<TeacherClassroomResponseDto> {
     const teacherId = req.user.sub;
     return this.classroomsCrudService.updateClassroom(id, teacherId, dto);
@@ -287,7 +287,7 @@ export class TeacherClassroomsController {
   })
   async deleteClassroom(
     @Param('id') id: string,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<{ success: boolean; message: string }> {
     const teacherId = req.user.sub;
     return this.classroomsCrudService.deleteClassroom(id, teacherId);
@@ -343,7 +343,7 @@ export class TeacherClassroomsController {
   async getClassroomStudents(
     @Param('id') id: string,
       @Query() query: GetClassroomStudentsQueryDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<PaginatedStudentsResponseDto> {
     const teacherId = req.user.sub;
     return this.classroomsCrudService.getClassroomStudents(id, teacherId, query);
@@ -383,7 +383,7 @@ export class TeacherClassroomsController {
   })
   async getClassroomStats(
     @Param('id') id: string,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<ClassroomStatsDto> {
     const teacherId = req.user.sub;
     return this.classroomsCrudService.getClassroomStats(id, teacherId);
@@ -423,7 +423,7 @@ export class TeacherClassroomsController {
   })
   async getClassroomTeachers(
     @Param('classroomId') classroomId: string,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<TeacherInClassroomDto[]> {
     const teacherId = req.user.sub;
     return this.classroomsCrudService.getClassroomTeachers(classroomId, teacherId);
@@ -488,7 +488,7 @@ export class TeacherClassroomsController {
   })
   async getClassroomProgress(
     @Param('id') id: string,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<any> {
     const teacherId = req.user.sub;
     return this.classroomsCrudService.getClassroomProgress(id, teacherId);
@@ -544,7 +544,7 @@ export class TeacherClassroomsController {
     @Param('classroomId') classroomId: string,
       @Param('studentId') studentId: string,
       @Body() dto: BlockStudentDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<StudentPermissionsResponseDto> {
     const teacherId = req.user.sub;
     return this.studentBlockingService.blockStudent(
@@ -599,7 +599,7 @@ export class TeacherClassroomsController {
   async unblockStudent(
     @Param('classroomId') classroomId: string,
       @Param('studentId') studentId: string,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<StudentPermissionsResponseDto> {
     const teacherId = req.user.sub;
     return this.studentBlockingService.unblockStudent(
@@ -649,7 +649,7 @@ export class TeacherClassroomsController {
   async getStudentPermissions(
     @Param('classroomId') classroomId: string,
       @Param('studentId') studentId: string,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<StudentPermissionsResponseDto> {
     const teacherId = req.user.sub;
     return this.studentBlockingService.getStudentPermissions(
@@ -705,7 +705,7 @@ export class TeacherClassroomsController {
     @Param('classroomId') classroomId: string,
       @Param('studentId') studentId: string,
       @Body() dto: UpdatePermissionsDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<StudentPermissionsResponseDto> {
     const teacherId = req.user.sub;
     return this.studentBlockingService.updateStudentPermissions(
diff --git a/projects/gamilit/apps/backend/src/modules/teacher/controllers/teacher-content.controller.ts b/projects/gamilit/apps/backend/src/modules/teacher/controllers/teacher-content.controller.ts
index 757f344..1180546 100644
--- a/projects/gamilit/apps/backend/src/modules/teacher/controllers/teacher-content.controller.ts
+++ b/projects/gamilit/apps/backend/src/modules/teacher/controllers/teacher-content.controller.ts
@@ -113,7 +113,7 @@ export class TeacherContentController {
   })
   async findAll(
     @Query() query: GetTeacherContentQueryDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<PaginatedTeacherContentResponseDto> {
     const teacherId = req.user.sub;
     return this.contentService.findAll(teacherId, query);
@@ -151,7 +151,7 @@ export class TeacherContentController {
     status: 403,
     description: 'Forbidden - Teacher is not the owner of this content',
   })
-  async findOne(@Param('id') id: string, @Request() req: any): Promise<TeacherContentResponseDto> {
+  async findOne(@Param('id') id: string, @Request() req: AuthRequest): Promise<TeacherContentResponseDto> {
     const teacherId = req.user.sub;
     return this.contentService.findOne(id, teacherId);
   }
@@ -193,7 +193,7 @@ export class TeacherContentController {
   })
   async create(
     @Body() dto: CreateTeacherContentDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<TeacherContentResponseDto> {
     const teacherId = req.user.sub;
     return this.contentService.create(teacherId, dto);
@@ -243,7 +243,7 @@ export class TeacherContentController {
   async update(
     @Param('id') id: string,
       @Body() dto: UpdateTeacherContentDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<TeacherContentResponseDto> {
     const teacherId = req.user.sub;
     return this.contentService.update(id, teacherId, dto);
@@ -292,7 +292,7 @@ export class TeacherContentController {
   })
   async delete(
     @Param('id') id: string,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<{ success: boolean; message: string }> {
     const teacherId = req.user.sub;
     return this.contentService.delete(id, teacherId);
@@ -338,7 +338,7 @@ export class TeacherContentController {
   async clone(
     @Param('id') id: string,
       @Body() dto: CloneTeacherContentDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<TeacherContentResponseDto> {
     const teacherId = req.user.sub;
     return this.contentService.clone(id, teacherId, dto);
@@ -386,7 +386,7 @@ export class TeacherContentController {
   })
   async publish(
     @Param('id') id: string,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<TeacherContentResponseDto> {
     const teacherId = req.user.sub;
     return this.contentService.publish(id, teacherId);
diff --git a/projects/gamilit/apps/backend/src/modules/teacher/controllers/teacher.controller.ts b/projects/gamilit/apps/backend/src/modules/teacher/controllers/teacher.controller.ts
index d9405bc..8ec2239 100644
--- a/projects/gamilit/apps/backend/src/modules/teacher/controllers/teacher.controller.ts
+++ b/projects/gamilit/apps/backend/src/modules/teacher/controllers/teacher.controller.ts
@@ -79,14 +79,14 @@ export class TeacherController {
 
   @Get('dashboard/stats')
   @ApiOperation({ summary: 'Get classroom statistics' })
-  async getClassroomStats(@Request() req: any) {
+  async getClassroomStats(@Request() req: AuthRequest) {
     const teacherId = req.user.id;
     return this.dashboardService.getClassroomStats(teacherId);
   }
 
   @Get('dashboard/activities')
   @ApiOperation({ summary: 'Get recent activities' })
-  async getRecentActivities(@Request() req: any, @Query('limit') limit?: number) {
+  async getRecentActivities(@Request() req: AuthRequest, @Query('limit') limit?: number) {
     const teacherId = req.user.id;
     return this.dashboardService.getRecentActivities(
       teacherId,
@@ -96,14 +96,14 @@ export class TeacherController {
 
   @Get('dashboard/alerts')
   @ApiOperation({ summary: 'Get student alerts' })
-  async getStudentAlerts(@Request() req: any) {
+  async getStudentAlerts(@Request() req: AuthRequest) {
     const teacherId = req.user.id;
     return this.dashboardService.getStudentAlerts(teacherId);
   }
 
   @Get('dashboard/top-performers')
   @ApiOperation({ summary: 'Get top performing students' })
-  async getTopPerformers(@Request() req: any, @Query('limit') limit?: number) {
+  async getTopPerformers(@Request() req: AuthRequest, @Query('limit') limit?: number) {
     const teacherId = req.user.id;
     return this.dashboardService.getTopPerformers(
       teacherId,
@@ -113,7 +113,7 @@ export class TeacherController {
 
   @Get('dashboard/module-progress')
   @ApiOperation({ summary: 'Get module progress summary' })
-  async getModuleProgressSummary(@Request() req: any) {
+  async getModuleProgressSummary(@Request() req: AuthRequest) {
     const teacherId = req.user.id;
     return this.dashboardService.getModuleProgressSummary(teacherId);
   }
@@ -150,7 +150,7 @@ export class TeacherController {
   })
   async getStudentNotes(
     @Param('studentId') studentId: string,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<StudentNoteResponseDto[]> {
     const teacherId = req.user.profile.id;
     return this.studentProgressService.getStudentNotes(studentId, teacherId);
@@ -164,7 +164,7 @@ export class TeacherController {
   async addStudentNote(
     @Param('studentId') studentId: string,
       @Body() noteDto: AddTeacherNoteDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<StudentNoteResponseDto> {
     const teacherId = req.user.profile.id;
     return this.studentProgressService.addStudentNote(
@@ -263,7 +263,7 @@ export class TeacherController {
       'Retrieve engagement metrics including active students, submission rates, and classroom activity',
   })
   async getEngagementMetrics(
-  @Request() req: any,
+  @Request() req: AuthRequest,
     @Query() query: GetEngagementMetricsDto,
   ) {
     const teacherId = req.user.profile.id;
@@ -277,7 +277,7 @@ export class TeacherController {
       'Generate comprehensive reports with analytics across classrooms, assignments, and student performance',
   })
   async generateReports(
-  @Request() req: any,
+  @Request() req: AuthRequest,
     @Query() query: GenerateReportsDto,
   ) {
     const teacherId = req.user.profile.id;
@@ -298,7 +298,7 @@ export class TeacherController {
     type: EconomyAnalyticsDto,
   })
   async getEconomyAnalytics(
-    @Request() req: any,
+    @Request() req: AuthRequest,
       @Query('classroom_id') classroomId?: string,
   ): Promise<EconomyAnalyticsDto> {
     const teacherId = req.user.profile.id;
@@ -319,7 +319,7 @@ export class TeacherController {
     type: StudentsEconomyResponseDto,
   })
   async getStudentsEconomy(
-    @Request() req: any,
+    @Request() req: AuthRequest,
       @Query('classroom_id') classroomId?: string,
   ): Promise<StudentsEconomyResponseDto> {
     const teacherId = req.user.profile.id;
@@ -340,7 +340,7 @@ export class TeacherController {
     type: AchievementsStatsResponseDto,
   })
   async getAchievementsStats(
-    @Request() req: any,
+    @Request() req: AuthRequest,
       @Query('classroom_id') classroomId?: string,
   ): Promise<AchievementsStatsResponseDto> {
     const teacherId = req.user.profile.id;
@@ -361,7 +361,7 @@ export class TeacherController {
   })
   @ApiProduces('application/pdf', 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet')
   async generateInsightsReport(
-  @Request() req: any,
+  @Request() req: AuthRequest,
     @Body() dto: GenerateReportDto,
     @Res() res: Response,
   ) {
@@ -422,7 +422,7 @@ export class TeacherController {
   async grantBonus(
     @Param('studentId') studentId: string,
       @Body() dto: GrantBonusDto,
-      @Request() req: any,
+      @Request() req: AuthRequest,
   ): Promise<GrantBonusResponseDto> {
     const teacherId = req.user.profile.id;
     return this.bonusCoinsService.grantBonus(teacherId, studentId, dto);
@@ -443,7 +443,7 @@ export class TeacherController {
     type: [ReportMetadataDto],
   })
   async getRecentReports(
-    @Request() req: any,
+    @Request() req: AuthRequest,
       @Query() query: GetRecentReportsQueryDto,
   ): Promise<ReportMetadataDto[]> {
     const teacherId = req.user.profile.id;
@@ -461,7 +461,7 @@ export class TeacherController {
     description: 'Report stats retrieved successfully',
     type: ReportStatsDto,
   })
-  async getReportStats(@Request() req: any): Promise<ReportStatsDto> {
+  async getReportStats(@Request() req: AuthRequest): Promise<ReportStatsDto> {
     const teacherId = req.user.profile.id;
     return this.teacherReportsService.getReportStats(teacherId);
   }
@@ -486,7 +486,7 @@ export class TeacherController {
   })
   async downloadReport(
   @Param('id') reportId: string,
-    @Request() req: any,
+    @Request() req: AuthRequest,
     @Res() res: Response,
   ) {
     const teacherId = req.user.profile.id;
diff --git a/projects/gamilit/apps/backend/src/modules/teacher/dto/classroom-response.dto.ts b/projects/gamilit/apps/backend/src/modules/teacher/dto/classroom-response.dto.ts
index 396b776..b6f14ad 100644
--- a/projects/gamilit/apps/backend/src/modules/teacher/dto/classroom-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/teacher/dto/classroom-response.dto.ts
@@ -176,13 +176,13 @@ export class TeacherClassroomDetailResponseDto extends TeacherClassroomResponseD
       allow_self_enrollment: false,
     },
   })
-    settings!: Record<string, any>;
+    settings!: Record<string, unknown>;
 
   @ApiProperty({
     description: 'Metadatos adicionales',
     example: {},
   })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 }
 
 // ============================================================================
diff --git a/projects/gamilit/apps/backend/src/modules/teacher/dto/create-review.dto.ts b/projects/gamilit/apps/backend/src/modules/teacher/dto/create-review.dto.ts
index 68e3997..a27ff35 100644
--- a/projects/gamilit/apps/backend/src/modules/teacher/dto/create-review.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/teacher/dto/create-review.dto.ts
@@ -60,7 +60,7 @@ export class CreateReviewDto {
   })
   @IsObject()
   @IsOptional()
-    detailedFeedback?: Record<string, any>;
+    detailedFeedback?: Record<string, unknown>;
 }
 
 /**
diff --git a/projects/gamilit/apps/backend/src/modules/teacher/dto/exercise-responses.dto.ts b/projects/gamilit/apps/backend/src/modules/teacher/dto/exercise-responses.dto.ts
index 7b2da8f..3ac7725 100644
--- a/projects/gamilit/apps/backend/src/modules/teacher/dto/exercise-responses.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/teacher/dto/exercise-responses.dto.ts
@@ -197,7 +197,7 @@ export class AttemptResponseDto {
     description: 'Submitted answers (JSONB)',
     example: { answers: ['A', 'B', 'C'] },
   })
-    submitted_answers!: Record<string, any>;
+    submitted_answers!: Record<string, unknown>;
 
   @ApiProperty({
     description: 'Is the answer correct?',
@@ -257,7 +257,7 @@ export class AttemptDetailDto extends AttemptResponseDto {
     description: 'Correct answer (from exercise)',
     example: { correct_answers: ['A', 'C', 'D'] },
   })
-    correct_answer!: Record<string, any>;
+    correct_answer!: Record<string, unknown>;
 
   @ApiProperty({
     description: 'Exercise type',
diff --git a/projects/gamilit/apps/backend/src/modules/teacher/dto/grades.dto.ts b/projects/gamilit/apps/backend/src/modules/teacher/dto/grades.dto.ts
index 6109907..3fd41cb 100644
--- a/projects/gamilit/apps/backend/src/modules/teacher/dto/grades.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/teacher/dto/grades.dto.ts
@@ -73,7 +73,7 @@ export class GradeDetailResponseDto extends GradeResponseDto {
     exercise_type!: string;
 
   @ApiProperty({ description: 'Answer data (JSON)' })
-    answer_data!: Record<string, any>;
+    answer_data!: Record<string, unknown>;
 
   @ApiProperty({ description: 'Indicates if answer is correct' })
     is_correct!: boolean;
diff --git a/projects/gamilit/apps/backend/src/modules/teacher/dto/intervention-alerts.dto.ts b/projects/gamilit/apps/backend/src/modules/teacher/dto/intervention-alerts.dto.ts
index 5590364..a9eeb34 100644
--- a/projects/gamilit/apps/backend/src/modules/teacher/dto/intervention-alerts.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/teacher/dto/intervention-alerts.dto.ts
@@ -188,7 +188,7 @@ export class InterventionAlertResponseDto {
     required: false,
     example: { days_inactive: 7, last_activity: '2025-11-17' },
   })
-    metrics?: Record<string, any> | null;
+    metrics?: Record<string, unknown> | null;
 
   @ApiProperty({ enum: AlertStatus, description: 'Estado actual de la alerta' })
     status!: AlertStatus;
diff --git a/projects/gamilit/apps/backend/src/modules/teacher/dto/student-blocking/student-permissions-response.dto.ts b/projects/gamilit/apps/backend/src/modules/teacher/dto/student-blocking/student-permissions-response.dto.ts
index eedad19..e934efa 100644
--- a/projects/gamilit/apps/backend/src/modules/teacher/dto/student-blocking/student-permissions-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/teacher/dto/student-blocking/student-permissions-response.dto.ts
@@ -47,7 +47,7 @@ export class StudentPermissionsResponseDto {
       can_view_leaderboard: false,
     },
   })
-    permissions!: Record<string, any>;
+    permissions!: Record<string, unknown>;
 
   @ApiPropertyOptional({
     description: 'Fecha y hora del bloqueo (si aplica)',
diff --git a/projects/gamilit/apps/backend/src/modules/teacher/dto/teacher-content.dto.ts b/projects/gamilit/apps/backend/src/modules/teacher/dto/teacher-content.dto.ts
index 976de15..103caec 100644
--- a/projects/gamilit/apps/backend/src/modules/teacher/dto/teacher-content.dto.ts
+++ b/projects/gamilit/apps/backend/src/modules/teacher/dto/teacher-content.dto.ts
@@ -118,7 +118,7 @@ export class CreateTeacherContentDto {
   })
   @IsObject()
   @IsNotEmpty()
-    content_data!: Record<string, any>;
+    content_data!: Record<string, unknown>;
 
   @ApiPropertyOptional({
     description: 'Instrucciones para el estudiante',
@@ -304,7 +304,7 @@ export class CreateTeacherContentDto {
   })
   @IsObject()
   @IsOptional()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 }
 
 // ============================================================================
@@ -494,7 +494,7 @@ export class TeacherContentResponseDto {
   @ApiProperty({
     description: 'Datos del contenido',
   })
-    content_data!: Record<string, any>;
+    content_data!: Record<string, unknown>;
 
   @ApiPropertyOptional({
     description: 'Instrucciones',
diff --git a/projects/gamilit/apps/backend/src/modules/teacher/entities/student-intervention-alert.entity.ts b/projects/gamilit/apps/backend/src/modules/teacher/entities/student-intervention-alert.entity.ts
index 7917fe4..b7be2ce 100644
--- a/projects/gamilit/apps/backend/src/modules/teacher/entities/student-intervention-alert.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/teacher/entities/student-intervention-alert.entity.ts
@@ -158,7 +158,7 @@ export class StudentInterventionAlert {
    * - declining_trend: { score_drop: 30, period: '7 days' }
    */
   @Column({ type: 'jsonb', nullable: true })
-    metrics?: Record<string, any> | null;
+    metrics?: Record<string, unknown> | null;
 
   // =====================================================
   // STATUS & WORKFLOW
diff --git a/projects/gamilit/apps/backend/src/modules/teacher/entities/teacher-content.entity.ts b/projects/gamilit/apps/backend/src/modules/teacher/entities/teacher-content.entity.ts
index 78d6c2d..b5fdc55 100644
--- a/projects/gamilit/apps/backend/src/modules/teacher/entities/teacher-content.entity.ts
+++ b/projects/gamilit/apps/backend/src/modules/teacher/entities/teacher-content.entity.ts
@@ -46,7 +46,7 @@ export class TeacherContent {
 
   // Content body
   @Column({ type: 'jsonb', name: 'content_data', default: {} })
-    content_data!: Record<string, any>;
+    content_data!: Record<string, unknown>;
 
   @Column({ type: 'text', nullable: true })
     instructions?: string | null;
@@ -179,7 +179,7 @@ export class TeacherContent {
 
   // Metadata
   @Column({ type: 'jsonb', default: {} })
-    metadata!: Record<string, any>;
+    metadata!: Record<string, unknown>;
 
   // Flags
   @Column({ type: 'boolean', name: 'is_active', default: true })
diff --git a/projects/gamilit/apps/backend/src/modules/teacher/interfaces/ml-predictor.interface.ts b/projects/gamilit/apps/backend/src/modules/teacher/interfaces/ml-predictor.interface.ts
index 068b0da..62b2914 100644
--- a/projects/gamilit/apps/backend/src/modules/teacher/interfaces/ml-predictor.interface.ts
+++ b/projects/gamilit/apps/backend/src/modules/teacher/interfaces/ml-predictor.interface.ts
@@ -251,5 +251,5 @@ export interface MLPredictionResponse {
   /**
    * Metadata adicional
    */
-  metadata?: Record<string, any>;
+  metadata?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/modules/teacher/services/analytics.service.ts b/projects/gamilit/apps/backend/src/modules/teacher/services/analytics.service.ts
index ef43239..9bcd1f8 100644
--- a/projects/gamilit/apps/backend/src/modules/teacher/services/analytics.service.ts
+++ b/projects/gamilit/apps/backend/src/modules/teacher/services/analytics.service.ts
@@ -71,7 +71,7 @@ export class AnalyticsService {
   /**
    * Get comprehensive classroom analytics
    */
-  async getClassroomAnalytics(query: GetAnalyticsQueryDto) {
+  async getClassroomAnalytics(_query: GetAnalyticsQueryDto) {
     const students = await this.profileRepository.find({
       where: { role: GamilityRoleEnum.STUDENT },
     });
@@ -1189,7 +1189,7 @@ export class AnalyticsService {
   private calculatePredictions(
     stats: any,
     overall_score: number,
-    risk_level: 'low' | 'medium' | 'high',
+    _risk_level: 'low' | 'medium' | 'high',
   ): { completion_probability: number; dropout_risk: number } {
     // Simple heuristic-based predictions
     let completion_probability = 0.5; // Default 50%
diff --git a/projects/gamilit/apps/backend/src/modules/teacher/services/ml-predictor.service.ts b/projects/gamilit/apps/backend/src/modules/teacher/services/ml-predictor.service.ts
index 3c0be2f..e41d428 100644
--- a/projects/gamilit/apps/backend/src/modules/teacher/services/ml-predictor.service.ts
+++ b/projects/gamilit/apps/backend/src/modules/teacher/services/ml-predictor.service.ts
@@ -138,7 +138,7 @@ export class MLPredictorService implements IMLPredictor {
    *
    * TODO: Get from trained model's feature importance
    */
-  async getFeatureImportance(input: StudentMLInput): Promise<FeatureImportance[]> {
+  async getFeatureImportance(_input: StudentMLInput): Promise<FeatureImportance[]> {
     // Heurística de importancia (pesos usados en predicción)
     const features: FeatureImportance[] = [
       {
diff --git a/projects/gamilit/apps/backend/src/modules/teacher/services/reports.service.ts b/projects/gamilit/apps/backend/src/modules/teacher/services/reports.service.ts
index 107ff67..5450aa7 100644
--- a/projects/gamilit/apps/backend/src/modules/teacher/services/reports.service.ts
+++ b/projects/gamilit/apps/backend/src/modules/teacher/services/reports.service.ts
@@ -129,7 +129,7 @@ export class ReportsService {
   /**
    * Generate a descriptive report name
    */
-  private generateReportName(type: ReportType: ReportFormat): string {
+  private generateReportName(type: ReportType, _format: ReportFormat): string {
     const typeLabels: Record<ReportType, string> = {
       [ReportType.USERS]: 'Reporte-Usuarios',
       [ReportType.PROGRESS]: 'Reporte-Progreso',
diff --git a/projects/gamilit/apps/backend/src/modules/teacher/services/teacher-dashboard.service.ts b/projects/gamilit/apps/backend/src/modules/teacher/services/teacher-dashboard.service.ts
index 98b5366..aaeea8e 100644
--- a/projects/gamilit/apps/backend/src/modules/teacher/services/teacher-dashboard.service.ts
+++ b/projects/gamilit/apps/backend/src/modules/teacher/services/teacher-dashboard.service.ts
@@ -72,7 +72,7 @@ export class TeacherDashboardService {
    *
    * Fixed: Removed 'as any' casts, now uses In() operator properly
    */
-  async getClassroomStats(teacherId: string): Promise<ClassroomStats> {
+  async getClassroomStats(_teacherId: string): Promise<ClassroomStats> {
     // Get all students from teacher's classrooms
     // TODO: Implement classroom-teacher relationship
     // For now, we'll get all students
@@ -216,7 +216,7 @@ export class TeacherDashboardService {
    *
    * Fixed: Eliminated N+1 query problem, now uses bulk query + grouping in code
    */
-  async getStudentAlerts(teacherId: string): Promise<StudentAlert[]> {
+  async getStudentAlerts(_teacherId: string): Promise<StudentAlert[]> {
     // 1. Get all students
     const students = await this.profileRepository.find({
       where: { role: GamilityRoleEnum.STUDENT },
@@ -372,7 +372,7 @@ export class TeacherDashboardService {
    * Note: Module name will be fetched separately or shown as ID
    */
   async getModuleProgressSummary(
-    teacherId: string,
+    _teacherId: string,
   ): Promise<ModuleProgressSummary[]> {
     // 1. Get all module progress records
     const moduleProgresses = await this.moduleProgressRepository.find();
diff --git a/projects/gamilit/apps/backend/src/modules/teacher/services/teacher-messages.service.ts b/projects/gamilit/apps/backend/src/modules/teacher/services/teacher-messages.service.ts
index d8348f3..56a17e0 100644
--- a/projects/gamilit/apps/backend/src/modules/teacher/services/teacher-messages.service.ts
+++ b/projects/gamilit/apps/backend/src/modules/teacher/services/teacher-messages.service.ts
@@ -324,7 +324,7 @@ export class TeacherMessagesService {
    * @param tenantId - ID del tenant
    * @throws ForbiddenException si no tiene acceso
    */
-  async markAsRead(messageId: string, teacherId: string: string): Promise<void> {
+  async markAsRead(messageId: string, teacherId: string, _recipientId: string): Promise<void> {
     // Verificar acceso
     const hasAccess = await this.verifyMessageAccess(messageId, teacherId);
     if (!hasAccess) {
diff --git a/projects/gamilit/apps/backend/src/modules/websocket/notifications.gateway.ts b/projects/gamilit/apps/backend/src/modules/websocket/notifications.gateway.ts
index 895b850..5d6a318 100644
--- a/projects/gamilit/apps/backend/src/modules/websocket/notifications.gateway.ts
+++ b/projects/gamilit/apps/backend/src/modules/websocket/notifications.gateway.ts
@@ -37,7 +37,7 @@ implements OnGatewayInit, OnGatewayConnection, OnGatewayDisconnect {
 
   private userSockets = new Map<string, Set<string>>(); // userId -> Set of socketIds
 
-  afterInit(server: Server) {
+  afterInit(_server: Server) {
     this.logger.log('WebSocket Gateway initialized');
   }
 
diff --git a/projects/gamilit/apps/backend/src/shared/dto/notifications/create-notification.dto.ts b/projects/gamilit/apps/backend/src/shared/dto/notifications/create-notification.dto.ts
index ae25d6b..43f7b5a 100644
--- a/projects/gamilit/apps/backend/src/shared/dto/notifications/create-notification.dto.ts
+++ b/projects/gamilit/apps/backend/src/shared/dto/notifications/create-notification.dto.ts
@@ -165,7 +165,7 @@ export class CreateNotificationDto {
   })
   @IsObject()
   @IsOptional()
-    data?: Record<string, any>;
+    data?: Record<string, unknown>;
 
   /**
    * Metadata adicional (opcional) - alias para data
@@ -180,7 +180,7 @@ export class CreateNotificationDto {
   })
   @IsObject()
   @IsOptional()
-    metadata?: Record<string, any>;
+    metadata?: Record<string, unknown>;
 
   /**
    * Prioridad de la notificación (opcional)
diff --git a/projects/gamilit/apps/backend/src/shared/dto/notifications/notification-response.dto.ts b/projects/gamilit/apps/backend/src/shared/dto/notifications/notification-response.dto.ts
index 48bfc67..34af64b 100644
--- a/projects/gamilit/apps/backend/src/shared/dto/notifications/notification-response.dto.ts
+++ b/projects/gamilit/apps/backend/src/shared/dto/notifications/notification-response.dto.ts
@@ -84,7 +84,7 @@ export class NotificationResponseDto {
     example: { achievementIcon: '🏆', points: 100 },
     nullable: true,
   })
-    data?: Record<string, any> | null;
+    data?: Record<string, unknown> | null;
 
   /**
    * Indica si la notificación fue leída
diff --git a/projects/gamilit/apps/backend/src/shared/dto/reports/generate-report.dto.ts b/projects/gamilit/apps/backend/src/shared/dto/reports/generate-report.dto.ts
index ba3df4b..a90d3a2 100644
--- a/projects/gamilit/apps/backend/src/shared/dto/reports/generate-report.dto.ts
+++ b/projects/gamilit/apps/backend/src/shared/dto/reports/generate-report.dto.ts
@@ -84,5 +84,5 @@ export class GenerateReportDto {
     example: { start_date: '2025-01-01', end_date: '2025-12-31' },
   })
   @IsOptional()
-    filters?: Record<string, any>;
+    filters?: Record<string, unknown>;
 }
diff --git a/projects/gamilit/apps/backend/src/shared/interceptors/rls.interceptor.ts b/projects/gamilit/apps/backend/src/shared/interceptors/rls.interceptor.ts
index 1a8cf1c..a79fad5 100644
--- a/projects/gamilit/apps/backend/src/shared/interceptors/rls.interceptor.ts
+++ b/projects/gamilit/apps/backend/src/shared/interceptors/rls.interceptor.ts
@@ -53,7 +53,8 @@ export class RlsInterceptor implements NestInterceptor {
       // Por ahora, simplemente retornamos null y logueamos
       this.logger.debug(`Attempting to get DataSource for connection: ${connectionName}`);
       return null;
-    } catch () {
+      // eslint-disable-next-line @typescript-eslint/no-unused-vars
+    } catch (_error) {
       this.logger.warn(`DataSource '${connectionName}' not found, skipping RLS setup`);
       return null;
     }
diff --git a/projects/gamilit/apps/backend/src/shared/interceptors/transform-response.interceptor.ts b/projects/gamilit/apps/backend/src/shared/interceptors/transform-response.interceptor.ts
index 0cb7192..7558ea7 100644
--- a/projects/gamilit/apps/backend/src/shared/interceptors/transform-response.interceptor.ts
+++ b/projects/gamilit/apps/backend/src/shared/interceptors/transform-response.interceptor.ts
@@ -67,7 +67,7 @@ export class TransformResponseInterceptor implements NestInterceptor {
 
     // Si es un objeto, transformar cada propiedad
     if (typeof obj === 'object') {
-      const transformed: Record<string, any> = {};
+      const transformed: Record<string, unknown> = {};
       for (const key in obj) {
         if (Object.prototype.hasOwnProperty.call(obj, key)) {
           transformed[key] = this.transformDates(obj[key]);
diff --git a/projects/gamilit/apps/backend/src/shared/types/index.ts b/projects/gamilit/apps/backend/src/shared/types/index.ts
index fbecf0f..a394a78 100644
--- a/projects/gamilit/apps/backend/src/shared/types/index.ts
+++ b/projects/gamilit/apps/backend/src/shared/types/index.ts
@@ -18,7 +18,7 @@ export interface User {
   email: string;
   encrypted_password: string;
   role: 'student' | 'admin_teacher' | 'super_admin';
-  raw_user_meta_data?: any;
+  raw_user_meta_data?: Record<string, unknown>;
   created_at: Date;
   updated_at: Date;
   last_sign_in_at?: Date;
@@ -59,8 +59,8 @@ export interface UserProfile {
   grade_level?: string;
   school_id?: string;
   is_active: boolean;
-  preferences?: any;
-  metadata?: any;
+  preferences?: Record<string, unknown>;
+  metadata?: Record<string, unknown>;
   created_at: Date;
   updated_at: Date;
 }
@@ -70,10 +70,16 @@ export interface UserProfile {
  */
 export interface AuthUser {
   id: string;
+  sub?: string; // JWT subject (user ID)
   email: string;
   role: string;
   rank?: string;
   tenant_id?: string;
+  tenantId?: string; // Alternative naming
+  profile?: {
+    id: string;
+    tenant_id?: string;
+  };
 }
 
 /**
@@ -88,13 +94,13 @@ export interface AuthRequest extends Request {
 /**
  * API Response Interface
  */
-export interface APIResponse<T = any> {
+export interface APIResponse<T = unknown> {
   success: boolean;
   data?: T;
   error?: {
     code: string;
     message: string;
-    details?: any;
+    details?: unknown;
   };
   meta?: {
     timestamp: string;
@@ -160,7 +166,7 @@ export interface Achievement {
   rarity: 'common' | 'rare' | 'epic' | 'legendary';
   ml_coins_reward: number;
   xp_reward: number;
-  conditions?: any;
+  conditions?: Record<string, unknown>;
   is_secret: boolean;
   created_at: Date;
 }