Restore enterprise/LDAP login mode detection

- Added /users/auth-mode public endpoint to detect LDAP status
- Updated frontend to call getAuthMode() instead of hardcoded false
- Login page now automatically switches to enterprise mode when LDAP is enabled
- Fixes missing LDAP user login UI that was previously disabled with TODO comment

This restores the functionality that was commented out earlier where the login
page would auto-detect whether to show local user list or enterprise username input.

.claude/settings.local.json

@@ -155,7 +155,12 @@
       "Bash(pkill -9 -f \"uvicorn backend.main\")",
       "Bash(pkill -9 -f \"python3.*start_servers\")",
       "Bash(curl -v -X POST http://localhost:8916/users/login -H 'Content-Type: application/json' -d '{\"username\":\"admin\",\"password\":\"admin\"}')",
-      "Bash(pkill -9 -f \"uvicorn\\\\|gunicorn\")"
+      "Bash(pkill -9 -f \"uvicorn\\\\|gunicorn\")",
+      "Bash(curl -s http://localhost:3000)",
+      "Bash(/data/programare_AI/tfm_ainventory/venv/bin/python3 -m uvicorn backend.main:app --host 0.0.0.0 --port 8916)",
+      "Bash(curl -s http://localhost:8916/users/)",
+      "Bash(pkill -9 -f \"uvicorn.*backend.main\" sleep 2 /data/programare_AI/tfm_ainventory/venv/bin/python3 -m uvicorn backend.main:app --host 0.0.0.0 --port 8916)",
+      "Bash(curl -s http://localhost:8916/users/auth-mode)"
     ]
   }
 }

.standalone.pid

@@ -1,3 +1,2 @@
-98497
-98498
-98515
+105655
+105674

backend/routers/auth.py

@@ -257,6 +257,16 @@ def login(request: Request, form_data: schemas.UserLogin, db: Session = Depends(
     )
 
 
+@router.get("/auth-mode")
+def get_auth_mode():
+    """[C-01] Get authentication mode (public endpoint for login page)."""
+    config = get_ldap_config()
+    return {
+        "mode": "enterprise" if config.get("ldap_enabled") else "local",
+        "ldap_enabled": config.get("ldap_enabled", False)
+    }
+
+
 @router.get("/ldap-config")
 def get_ldap_settings(current_user: auth.TokenData = Depends(auth.get_current_admin)):
     """[C-01] Get LDAP config — admin only."""

frontend/app/globals.css

@@ -5,7 +5,7 @@
 @tailwind utilities;
 
 @layer base {
-    :root {
+        :root {
     /* Base colors from DESIGN.md - AUTO-GENERATED from colors.mjs */
 
     /* Base colors from DESIGN.md */
@@ -87,6 +87,8 @@
   }
 
 
+
+
   * {
     @apply border-border;
     border-radius: 0 !important;

frontend/app/login/page.tsx

@@ -23,15 +23,15 @@ export default function LoginPage() {
   const checkMode = async () => {
     try {
       setIsLoading(true);
-      // TODO: getNetworkConfig() method not implemented in API
-      // const config = await inventoryApi.getNetworkConfig();
-      // setIsEnterprise(config.mode === 'enterprise');
-      setIsEnterprise(false); // Default to non-enterprise mode
+      // Get authentication mode from backend
+      const authMode = await inventoryApi.getAuthMode();
+      setIsEnterprise(authMode.mode === 'enterprise');
 
       const userList = await inventoryApi.getUsers();
       setUsers(userList);
     } catch (error) {
-      console.error("Failed to load users", error);
+      console.error("Failed to load auth mode or users", error);
+      setIsEnterprise(false); // Default to local mode on error
     } finally {
       setIsLoading(false);
     }

frontend/lib/api.ts

@@ -85,6 +85,12 @@ axiosInstance.interceptors.response.use(
 );
 
 export const inventoryApi = {
+  getAuthMode: async () => {
+    const baseUrl = await getBackendUrl();
+    const res = await axios.get(`${baseUrl}/users/auth-mode`);
+    return res.data;
+  },
+
   getItems: async () => {
     const res = await axiosInstance.get('/items/');
     return res.data;