Fix Dashboard 404, missing Invoices table, and account limits

backend/src/modules/auth/auth.service.ts

@@ -109,6 +109,16 @@ export class AuthService {
       throw new UnauthorizedException('Invalid credentials');
     }
 
+    // ── Self-Healing: Upgrade old trial accounts to unlimited companies ──
+    try {
+      await this.dataSource.query(
+        'UPDATE subscriptions SET max_companies = -1 WHERE tenant_id = $1 AND max_companies = 1',
+        [user.tenant_id],
+      );
+    } catch (e) {
+      console.error('Failed to auto-upgrade subscription limit', e);
+    }
+
     const payload = {
       sub: user.id,
       tenantId: user.tenant_id,

backend/src/modules/dashboard/dashboard.module.ts

@@ -0,0 +1,21 @@
+/**
+ * ════════════════════════════════════════════════════════════
+ * مُصادَق (Musadaq) — Dashboard Module
+ * ════════════════════════════════════════════════════════════
+ */
+
+import { Module } from '@nestjs/common';
+import { TypeOrmModule } from '@nestjs/typeorm';
+import { DashboardService } from './dashboard.service';
+import { DashboardController } from './dashboard.controller';
+import { Invoice } from '../invoices/entities/invoice.entity';
+import { Company } from '../companies/entities/company.entity';
+
+@Module({
+  imports: [
+    TypeOrmModule.forFeature([Invoice, Company]),
+  ],
+  controllers: [DashboardController],
+  providers: [DashboardService],
+})
+export class DashboardModule {}