feat: technical role can view all applications with search, separate /all route

- Add GET /applications/all endpoint for admin/technical with search by user name/email/ID
- GET /applications now always returns only the current user's apps (fix for technical seeing all apps)
- Technical role can view/edit/delete any application (same as admin)
- Add 'All Applications' page with search bar, user info columns, status badges
- Add 'All Applications' link to admin and technical sidebar navigation
- Add user relation to Application TypeScript interface

backend/src/applications/applications.service.ts

@@ -84,11 +84,22 @@ export class ApplicationsService {
     });
   }
 
-  async findAll(): Promise<Application[]> {
-    return this.appsRepository.find({
-      relations: ['user', 'deployments'],
-      order: { createdAt: 'DESC' },
-    });
+  async findAll(search?: string): Promise<Application[]> {
+    const qb = this.appsRepository
+      .createQueryBuilder('app')
+      .leftJoinAndSelect('app.user', 'user')
+      .leftJoinAndSelect('app.deployments', 'deployments')
+      .orderBy('app.createdAt', 'DESC');
+
+    if (search && search.trim()) {
+      const s = `%${search.trim()}%`;
+      qb.where(
+        '(user.firstName ILIKE :s OR user.lastName ILIKE :s OR user.email ILIKE :s OR CAST(app.userId AS TEXT) ILIKE :s OR app.name ILIKE :s)',
+        { s },
+      );
+    }
+
+    return qb.getMany();
   }
 
   async findOne(id: string, userId?: string): Promise<Application> {