Refactor import statements across multiple modules to use relative paths for better organization and maintainability.

Co-authored-by: Copilot <copilot@github.com>

backend/app/routers/admin.py

@@ -3,8 +3,8 @@ from datetime import datetime, timezone
 
 from fastapi import APIRouter, Depends
 
-from backend.app.db import get_conn, get_write_lock
-from backend.app.dependencies import require_admin
+from ..db import get_conn, get_write_lock
+from ..dependencies import require_admin
 
 router = APIRouter(prefix="/admin", tags=["admin"])
 

backend/app/routers/ai.py

@@ -1,9 +1,9 @@
 """AI router: model listing and chat completions via OpenRouter."""
 from fastapi import APIRouter, Depends, HTTPException, status
 
-from backend.app.dependencies import get_current_user
-from backend.app.models.ai import ChatRequest, ChatResponse, ModelInfo
-from backend.app.services import openrouter
+from ..dependencies import get_current_user
+from ..models.ai import ChatRequest, ChatResponse, ModelInfo
+from ..services import openrouter
 
 router = APIRouter(prefix="/ai", tags=["ai"])
 

backend/app/routers/auth.py

@@ -4,8 +4,8 @@ import uuid
 from fastapi import APIRouter, HTTPException, status
 from jose import JWTError
 
-from backend.app.models.auth import LoginRequest, RefreshRequest, RegisterRequest, TokenResponse
-from backend.app.services.auth import (
+from ..models.auth import LoginRequest, RefreshRequest, RegisterRequest, TokenResponse
+from ..services.auth import (
     authenticate_user,
     create_access_token,
     create_refresh_token,
@@ -71,7 +71,7 @@ async def refresh(body: RefreshRequest) -> TokenResponse:
     new_jti = str(uuid.uuid4())
     await store_refresh_token(user_id, new_jti)
 
-    from backend.app.db import get_conn
+    from ..db import get_conn
     conn = get_conn()
     row = conn.execute(
         "SELECT email, role FROM users WHERE id = ?", [user_id]

backend/app/routers/generate.py

@@ -1,8 +1,8 @@
 """Generate router: text, image, video, and image-to-video generation."""
 from fastapi import APIRouter, Depends, HTTPException, status
 
-from backend.app.dependencies import get_current_user
-from backend.app.models.ai import (
+from ..dependencies import get_current_user
+from ..models.ai import (
     ImageRequest,
     ImageResponse,
     ImageResult,
@@ -12,7 +12,7 @@ from backend.app.models.ai import (
     VideoRequest,
     VideoResponse,
 )
-from backend.app.services import openrouter
+from ..services import openrouter
 
 router = APIRouter(prefix="/generate", tags=["generate"])
 

backend/app/routers/users.py

@@ -1,9 +1,9 @@
 """Users router: self-service profile and admin user management."""
 from fastapi import APIRouter, Depends, HTTPException, status
 
-from backend.app.dependencies import get_current_user, require_admin
-from backend.app.models.users import SetRoleRequest, UpdateUserRequest, UserResponse
-from backend.app.services.users import (
+from ..dependencies import get_current_user, require_admin
+from ..models.users import SetRoleRequest, UpdateUserRequest, UserResponse
+from ..services.users import (
     delete_user,
     get_user,
     list_users,