✨ feat(admin): add user data dashboard for cross-project data visualization

Add comprehensive admin dashboard to view and manage user data across all projects:

Backend:
- Add admin endpoints to Chat, Todo, Contacts, Calendar, Picture, Zitare, Presi
- Each backend exposes GET/DELETE /api/v1/admin/user-data/:userId
- Service-to-service auth via X-Service-Key header

Aggregation (mana-core-auth):
- GET /api/v1/admin/users - Paginated user list with search
- GET /api/v1/admin/users/:userId/data - Aggregated data from all backends
- DELETE /api/v1/admin/users/:userId/data - GDPR deletion across all projects

Frontend (ManaCore web):
- New User Data tab in admin navigation
- User search page at /admin/user-data
- User detail page with ProjectDataCard components
- GDPR deletion dialog with email confirmation

Presi:
- Migrate user_id from UUID to TEXT for Better Auth compatibility
- Add SQL migration script

apps/contacts/apps/backend/src/admin/admin.controller.ts

@@ -0,0 +1,34 @@
+import {
+	Controller,
+	Get,
+	Delete,
+	Param,
+	UseGuards,
+	Logger,
+	HttpCode,
+	HttpStatus,
+} from '@nestjs/common';
+import { AdminService } from './admin.service';
+import { ServiceAuthGuard } from './guards/service-auth.guard';
+import { UserDataResponse, DeleteUserDataResponse } from './dto/user-data-response.dto';
+
+@Controller('api/v1/admin')
+@UseGuards(ServiceAuthGuard)
+export class AdminController {
+	private readonly logger = new Logger(AdminController.name);
+
+	constructor(private readonly adminService: AdminService) {}
+
+	@Get('user-data/:userId')
+	async getUserData(@Param('userId') userId: string): Promise<UserDataResponse> {
+		this.logger.log(`Admin request: getUserData for userId=${userId}`);
+		return this.adminService.getUserData(userId);
+	}
+
+	@Delete('user-data/:userId')
+	@HttpCode(HttpStatus.OK)
+	async deleteUserData(@Param('userId') userId: string): Promise<DeleteUserDataResponse> {
+		this.logger.log(`Admin request: deleteUserData for userId=${userId}`);
+		return this.adminService.deleteUserData(userId);
+	}
+}

apps/contacts/apps/backend/src/admin/admin.module.ts

@@ -0,0 +1,12 @@
+import { Module } from '@nestjs/common';
+import { ConfigModule } from '@nestjs/config';
+import { AdminController } from './admin.controller';
+import { AdminService } from './admin.service';
+import { DatabaseModule } from '../db/database.module';
+
+@Module({
+	imports: [ConfigModule, DatabaseModule],
+	controllers: [AdminController],
+	providers: [AdminService],
+})
+export class AdminModule {}

apps/contacts/apps/backend/src/admin/admin.service.ts

@@ -0,0 +1,152 @@
+import { Injectable, Logger } from '@nestjs/common';
+import { Inject } from '@nestjs/common';
+import { NodePgDatabase } from 'drizzle-orm/node-postgres';
+import { eq, sql, desc, inArray } from 'drizzle-orm';
+import * as schema from '../db/schema';
+import {
+	UserDataResponse,
+	DeleteUserDataResponse,
+	EntityCount,
+} from './dto/user-data-response.dto';
+
+@Injectable()
+export class AdminService {
+	private readonly logger = new Logger(AdminService.name);
+
+	constructor(
+		@Inject('DATABASE_CONNECTION')
+		private readonly db: NodePgDatabase<typeof schema>
+	) {}
+
+	async getUserData(userId: string): Promise<UserDataResponse> {
+		this.logger.log(`Getting user data for userId: ${userId}`);
+
+		// Count contacts
+		const contactsResult = await this.db
+			.select({ count: sql<number>`count(*)::int` })
+			.from(schema.contacts)
+			.where(eq(schema.contacts.userId, userId));
+		const contactsCount = contactsResult[0]?.count ?? 0;
+
+		// Count tags
+		const tagsResult = await this.db
+			.select({ count: sql<number>`count(*)::int` })
+			.from(schema.contactTags)
+			.where(eq(schema.contactTags.userId, userId));
+		const tagsCount = tagsResult[0]?.count ?? 0;
+
+		// Count notes
+		const notesResult = await this.db
+			.select({ count: sql<number>`count(*)::int` })
+			.from(schema.contactNotes)
+			.where(eq(schema.contactNotes.userId, userId));
+		const notesCount = notesResult[0]?.count ?? 0;
+
+		// Count activities
+		const activitiesResult = await this.db
+			.select({ count: sql<number>`count(*)::int` })
+			.from(schema.contactActivities)
+			.where(eq(schema.contactActivities.userId, userId));
+		const activitiesCount = activitiesResult[0]?.count ?? 0;
+
+		// Get last activity
+		const lastContact = await this.db
+			.select({ updatedAt: schema.contacts.updatedAt })
+			.from(schema.contacts)
+			.where(eq(schema.contacts.userId, userId))
+			.orderBy(desc(schema.contacts.updatedAt))
+			.limit(1);
+		const lastActivityAt = lastContact[0]?.updatedAt?.toISOString();
+
+		const entities: EntityCount[] = [
+			{ entity: 'contacts', count: contactsCount, label: 'Contacts' },
+			{ entity: 'tags', count: tagsCount, label: 'Tags' },
+			{ entity: 'notes', count: notesCount, label: 'Notes' },
+			{ entity: 'activities', count: activitiesCount, label: 'Activities' },
+		];
+
+		const totalCount = contactsCount + tagsCount + notesCount + activitiesCount;
+
+		return { entities, totalCount, lastActivityAt };
+	}
+
+	async deleteUserData(userId: string): Promise<DeleteUserDataResponse> {
+		this.logger.log(`Deleting user data for userId: ${userId}`);
+
+		const deletedCounts: EntityCount[] = [];
+		let totalDeleted = 0;
+
+		// Delete activities
+		const deletedActivities = await this.db
+			.delete(schema.contactActivities)
+			.where(eq(schema.contactActivities.userId, userId))
+			.returning();
+		deletedCounts.push({
+			entity: 'activities',
+			count: deletedActivities.length,
+			label: 'Activities',
+		});
+		totalDeleted += deletedActivities.length;
+
+		// Delete notes
+		const deletedNotes = await this.db
+			.delete(schema.contactNotes)
+			.where(eq(schema.contactNotes.userId, userId))
+			.returning();
+		deletedCounts.push({ entity: 'notes', count: deletedNotes.length, label: 'Notes' });
+		totalDeleted += deletedNotes.length;
+
+		// Get contact IDs for tag deletion
+		const userContacts = await this.db
+			.select({ id: schema.contacts.id })
+			.from(schema.contacts)
+			.where(eq(schema.contacts.userId, userId));
+		const contactIds = userContacts.map((c) => c.id);
+
+		// Delete contact_to_tags
+		if (contactIds.length > 0) {
+			const deletedContactToTags = await this.db
+				.delete(schema.contactToTags)
+				.where(inArray(schema.contactToTags.contactId, contactIds))
+				.returning();
+			deletedCounts.push({
+				entity: 'contact_to_tags',
+				count: deletedContactToTags.length,
+				label: 'Contact Tags',
+			});
+			totalDeleted += deletedContactToTags.length;
+		}
+
+		// Delete tags
+		const deletedTags = await this.db
+			.delete(schema.contactTags)
+			.where(eq(schema.contactTags.userId, userId))
+			.returning();
+		deletedCounts.push({ entity: 'tags', count: deletedTags.length, label: 'Tags' });
+		totalDeleted += deletedTags.length;
+
+		// Delete contacts
+		const deletedContacts = await this.db
+			.delete(schema.contacts)
+			.where(eq(schema.contacts.userId, userId))
+			.returning();
+		deletedCounts.push({ entity: 'contacts', count: deletedContacts.length, label: 'Contacts' });
+		totalDeleted += deletedContacts.length;
+
+		// Delete connected accounts
+		const deletedConnectedAccounts = await this.db
+			.delete(schema.connectedAccounts)
+			.where(eq(schema.connectedAccounts.userId, userId))
+			.returning();
+		deletedCounts.push({
+			entity: 'connected_accounts',
+			count: deletedConnectedAccounts.length,
+			label: 'Connected Accounts',
+		});
+		totalDeleted += deletedConnectedAccounts.length;
+
+		this.logger.log(`Deleted ${totalDeleted} records for userId: ${userId}`);
+
+		return { success: true, deletedCounts, totalDeleted };
+	}
+}

apps/contacts/apps/backend/src/admin/dto/user-data-response.dto.ts

@@ -0,0 +1,17 @@
+export interface EntityCount {
+	entity: string;
+	count: number;
+	label: string;
+}
+
+export interface UserDataResponse {
+	entities: EntityCount[];
+	totalCount: number;
+	lastActivityAt?: string;
+}
+
+export interface DeleteUserDataResponse {
+	success: boolean;
+	deletedCounts: EntityCount[];
+	totalDeleted: number;
+}

apps/contacts/apps/backend/src/admin/guards/service-auth.guard.ts

@@ -0,0 +1,36 @@
+import {
+	Injectable,
+	CanActivate,
+	ExecutionContext,
+	UnauthorizedException,
+	Logger,
+} from '@nestjs/common';
+import { ConfigService } from '@nestjs/config';
+import { Request } from 'express';
+
+@Injectable()
+export class ServiceAuthGuard implements CanActivate {
+	private readonly logger = new Logger(ServiceAuthGuard.name);
+	private readonly serviceKey: string;
+
+	constructor(private readonly configService: ConfigService) {
+		this.serviceKey = this.configService.get<string>('ADMIN_SERVICE_KEY', 'dev-admin-key');
+	}
+
+	canActivate(context: ExecutionContext): boolean {
+		const request = context.switchToHttp().getRequest<Request>();
+		const providedKey = request.headers['x-service-key'] as string;
+
+		if (!providedKey) {
+			this.logger.warn('Missing X-Service-Key header');
+			throw new UnauthorizedException('Missing service key');
+		}
+
+		if (providedKey !== this.serviceKey) {
+			this.logger.warn('Invalid service key provided');
+			throw new UnauthorizedException('Invalid service key');
+		}
+
+		return true;
+	}
+}

apps/contacts/apps/backend/src/app.module.ts

@@ -14,6 +14,7 @@ import { DuplicatesModule } from './duplicates/duplicates.module';
 import { PhotoModule } from './photo/photo.module';
 import { BatchModule } from './batch/batch.module';
 import { NetworkModule } from './network/network.module';
+import { AdminModule } from './admin/admin.module';
 
 @Module({
 	imports: [
@@ -38,6 +39,7 @@ import { NetworkModule } from './network/network.module';
 		PhotoModule,
 		BatchModule,
 		NetworkModule,
+		AdminModule,
 	],
 })
 export class AppModule {}