diff --git a/backend/src/common/auth/auth.service.ts b/backend/src/common/auth/auth.service.ts
index 32ff684..a13dd5a 100644
--- a/backend/src/common/auth/auth.service.ts
+++ b/backend/src/common/auth/auth.service.ts
@@ -78,9 +78,8 @@ export class AuthService {
           derivedRole = 'DC';
         }
       }
-      // eslint-disable-next-line @typescript-eslint/no-unused-vars
       const { password, ...result } = user;
-      return { ...result, role: derivedRole };
+      return { ...result, role: derivedRole } as User & { role: string };
     }
     return null;
   }
diff --git a/backend/src/modules/contract/contract.controller.ts b/backend/src/modules/contract/contract.controller.ts
index 4dddd5c..ea52a0e 100644
--- a/backend/src/modules/contract/contract.controller.ts
+++ b/backend/src/modules/contract/contract.controller.ts
@@ -13,7 +13,7 @@ import {
   ApiTags,
   ApiOperation,
   ApiBearerAuth,
-  _ApiQuery,
+  ApiQuery,
 } from '@nestjs/swagger';
 import { ContractService } from './contract.service.js';
 import { CreateContractDto } from './dto/create-contract.dto.js';
diff --git a/backend/src/modules/correspondence/correspondence.service.ts b/backend/src/modules/correspondence/correspondence.service.ts
index 99a71f1..11f2109 100644
--- a/backend/src/modules/correspondence/correspondence.service.ts
+++ b/backend/src/modules/correspondence/correspondence.service.ts
@@ -506,7 +506,7 @@ export class CorrespondenceService {
       : undefined;
 
     // 3. Update Correspondence Entity if needed
-    const correspondenceUpdate: DeepPartial<Correspondence> = {};
+    const correspondenceUpdate: any = {};
     if (updateDto.disciplineId)
       correspondenceUpdate.disciplineId = updateDto.disciplineId;
     if (updResolvedProjectId)
@@ -519,7 +519,7 @@ export class CorrespondenceService {
     }
 
     // 4. Update Revision Entity
-    const revisionUpdate: DeepPartial<CorrespondenceRevision> = {};
+    const revisionUpdate: any = {};
     if (updateDto.subject) revisionUpdate.subject = updateDto.subject;
     if (updateDto.body) revisionUpdate.body = updateDto.body;
     if (updateDto.remarks) revisionUpdate.remarks = updateDto.remarks;
diff --git a/backend/src/modules/correspondence/entities/correspondence-recipient.entity.ts b/backend/src/modules/correspondence/entities/correspondence-recipient.entity.ts
index 626c3de..3f6f22f 100644
--- a/backend/src/modules/correspondence/entities/correspondence-recipient.entity.ts
+++ b/backend/src/modules/correspondence/entities/correspondence-recipient.entity.ts
@@ -1,4 +1,4 @@
-import { Entity, _Column, PrimaryColumn, ManyToOne, JoinColumn } from 'typeorm';
+import { Entity, Column, PrimaryColumn, ManyToOne, JoinColumn } from 'typeorm';
 import { Correspondence } from './correspondence.entity';
 import { Organization } from '../../organization/entities/organization.entity';
 
diff --git a/backend/src/modules/document-numbering/services/document-numbering.service.ts b/backend/src/modules/document-numbering/services/document-numbering.service.ts
index 3e94466..8e352ce 100644
--- a/backend/src/modules/document-numbering/services/document-numbering.service.ts
+++ b/backend/src/modules/document-numbering/services/document-numbering.service.ts
@@ -490,7 +490,7 @@ export class DocumentNumberingService {
   }): Promise<DocumentNumberAudit> {
     const audit = this.auditRepo.create({
       documentNumber: data.documentNumber,
-      counterKey: data.counterKey,
+      counterKey: data.counterKey as Record<string, unknown>,
       templateUsed: data.templateUsed,
       isSuccess: data.isSuccess,
       operation: data.operation,
diff --git a/backend/src/modules/document-numbering/services/manual-override.service.ts b/backend/src/modules/document-numbering/services/manual-override.service.ts
index 4b2b40f..2ed7da4 100644
--- a/backend/src/modules/document-numbering/services/manual-override.service.ts
+++ b/backend/src/modules/document-numbering/services/manual-override.service.ts
@@ -26,7 +26,7 @@ export class ManualOverrideService {
       documentNumber: `OVERRIDE-TO-${dto.newLastNumber}`,
       operation: 'MANUAL_OVERRIDE',
       status: 'MANUAL',
-      counterKey: dto, // CounterKeyDto part of ManualOverrideDto
+      counterKey: dto as unknown as Record<string, unknown>, // CounterKeyDto part of ManualOverrideDto
       templateUsed: 'MANUAL_OVERRIDE',
       userId: userId,
       isSuccess: true,
diff --git a/backend/src/modules/document-numbering/services/metrics.service.ts b/backend/src/modules/document-numbering/services/metrics.service.ts
index ca9e4e4..ab63795 100644
--- a/backend/src/modules/document-numbering/services/metrics.service.ts
+++ b/backend/src/modules/document-numbering/services/metrics.service.ts
@@ -1,4 +1,4 @@
-import { Injectable, _Logger } from '@nestjs/common';
+import { Injectable, Logger } from '@nestjs/common';
 import { Counter, Gauge, Histogram } from 'prom-client';
 import { InjectMetric } from '@willsoto/nestjs-prometheus';
 
diff --git a/backend/src/modules/document-numbering/services/template.service.ts b/backend/src/modules/document-numbering/services/template.service.ts
index 31fabd1..7516989 100644
--- a/backend/src/modules/document-numbering/services/template.service.ts
+++ b/backend/src/modules/document-numbering/services/template.service.ts
@@ -1,4 +1,4 @@
-import { Injectable, Logger, _NotFoundException } from '@nestjs/common';
+import { Injectable, Logger, NotFoundException } from '@nestjs/common';
 import { InjectRepository } from '@nestjs/typeorm';
 import { Repository } from 'typeorm';
 import { DocumentNumberFormat } from '../entities/document-number-format.entity';
diff --git a/backend/src/modules/master/dto/create-tag.dto.ts b/backend/src/modules/master/dto/create-tag.dto.ts
index f1914ec..70f461b 100644
--- a/backend/src/modules/master/dto/create-tag.dto.ts
+++ b/backend/src/modules/master/dto/create-tag.dto.ts
@@ -1,4 +1,4 @@
-import { IsString, IsNotEmpty, IsOptional, _IsInt } from 'class-validator';
+import { IsString, IsNotEmpty, IsOptional, IsInt } from 'class-validator';
 import { ApiProperty } from '@nestjs/swagger';
 
 export class CreateTagDto {
diff --git a/backend/src/modules/master/dto/save-number-format.dto.ts b/backend/src/modules/master/dto/save-number-format.dto.ts
index 59cb52d..6322184 100644
--- a/backend/src/modules/master/dto/save-number-format.dto.ts
+++ b/backend/src/modules/master/dto/save-number-format.dto.ts
@@ -1,4 +1,4 @@
-import { IsInt, IsString, IsNotEmpty, _IsOptional } from 'class-validator';
+import { IsInt, IsString, IsNotEmpty, IsOptional } from 'class-validator';
 
 export class SaveNumberFormatDto {
   @IsInt()
diff --git a/backend/src/modules/master/master.controller.ts b/backend/src/modules/master/master.controller.ts
index d439e92..05092e8 100644
--- a/backend/src/modules/master/master.controller.ts
+++ b/backend/src/modules/master/master.controller.ts
@@ -4,7 +4,7 @@ import {
   Controller,
   Get,
   Post,
-  _Put,
+  Put,
   Body,
   Patch,
   Param,
diff --git a/backend/src/modules/notification/dto/create-notification.dto.ts b/backend/src/modules/notification/dto/create-notification.dto.ts
index c7bba67..f941d2e 100644
--- a/backend/src/modules/notification/dto/create-notification.dto.ts
+++ b/backend/src/modules/notification/dto/create-notification.dto.ts
@@ -4,7 +4,7 @@ import {
   IsOptional,
   IsEnum,
   IsNotEmpty,
-  _IsUrl,
+  IsUrl,
 } from 'class-validator';
 import { NotificationType } from '../entities/notification.entity';
 
diff --git a/backend/src/modules/notification/notification-cleanup.service.ts b/backend/src/modules/notification/notification-cleanup.service.ts
index 243dd9e..616d22a 100644
--- a/backend/src/modules/notification/notification-cleanup.service.ts
+++ b/backend/src/modules/notification/notification-cleanup.service.ts
@@ -1,7 +1,7 @@
 import { Injectable, Logger } from '@nestjs/common';
 import { Cron, CronExpression } from '@nestjs/schedule';
 import { InjectRepository } from '@nestjs/typeorm';
-import { Repository, _LessThan } from 'typeorm';
+import { Repository, LessThan } from 'typeorm';
 import { Notification } from './entities/notification.entity';
 
 @Injectable()
diff --git a/backend/src/modules/notification/notification.service.ts b/backend/src/modules/notification/notification.service.ts
index 9b7ba8c..7aefdc4 100644
--- a/backend/src/modules/notification/notification.service.ts
+++ b/backend/src/modules/notification/notification.service.ts
@@ -9,7 +9,7 @@ import { Repository } from 'typeorm';
 // Entities
 import { Notification, NotificationType } from './entities/notification.entity';
 import { User } from '../user/entities/user.entity';
-import { _UserPreference } from '../user/entities/user-preference.entity';
+import { UserPreference } from '../user/entities/user-preference.entity';
 
 // Gateway
 import { NotificationGateway } from './notification.gateway';
diff --git a/backend/src/modules/project/project.service.ts b/backend/src/modules/project/project.service.ts
index ef229ea..4decc8f 100644
--- a/backend/src/modules/project/project.service.ts
+++ b/backend/src/modules/project/project.service.ts
@@ -5,7 +5,7 @@ import {
   Logger,
 } from '@nestjs/common';
 import { InjectRepository } from '@nestjs/typeorm';
-import { Repository, _Like } from 'typeorm';
+import { Repository, Like } from 'typeorm';
 
 // Entities
 import { Project } from './entities/project.entity';
diff --git a/backend/src/modules/user/dto/assign-role.dto.ts b/backend/src/modules/user/dto/assign-role.dto.ts
index f2e0886..7d3414b 100644
--- a/backend/src/modules/user/dto/assign-role.dto.ts
+++ b/backend/src/modules/user/dto/assign-role.dto.ts
@@ -1,4 +1,4 @@
-import { IsInt, IsNotEmpty, IsOptional, _ValidateIf } from 'class-validator';
+import { IsInt, IsNotEmpty, IsOptional, ValidateIf } from 'class-validator';
 
 export class AssignRoleDto {
   @IsInt()