fix(middleware): prevent premature redirect to /login during loading

Users were incorrectly redirected to /login during the initial loading phase
before the loading was actually complete. Added loading_started and
loading_complete flags to properly track the initialization state so
the setup redirect middleware knows when it's safe to redirect.

Docs/NAVIGATION.md

@@ -108,6 +108,7 @@ The middleware checks the current state and redirects accordingly:
 | Flag | Purpose |
 |------|---------|
 | `setup_complete` | Initial configuration was saved |
+| `loading_started` | Loading phase has been initiated (redirected to /loading) |
 | `unresolved_completed` | User clicked "Done" on unresolved page |
 | `loading_complete` | Series scan + initial loading finished |
 | `nfo_scan_complete` | Final NFO scan finished |

Docs/key

@@ -1,3 +1,7 @@
 API key : 299ae8f630a31bda814263c551361448
 9bc3e547caff878615cbdba2cc421d37
 
+/setup
+
+
+SeriesApp initialized for directory:

src/server/api/auth.py

@@ -117,6 +117,10 @@ async def setup_auth(req: SetupRequest):
         # Store master password hash in config's other field
         config.other['master_password_hash'] = password_hash
         
+        # Mark that loading has been initiated (used by middleware to prevent
+        # premature redirect to /login after setup)
+        config.other['loading_started'] = True
+        
         # Store anime directory in config's other field if provided
         anime_directory = None
         if req.anime_directory:

src/server/middleware/setup_redirect.py

@@ -118,6 +118,20 @@ class SetupRedirectMiddleware(BaseHTTPMiddleware):
             return bool(other.get('unresolved_completed', False))
         except Exception:
             return False
+
+    def _is_loading_complete(self) -> bool:
+        """Check if initial loading has completed.
+        
+        Returns:
+            True if loading is complete, False otherwise
+        """
+        try:
+            config_service = get_config_service()
+            config = config_service.load_config()
+            other = config.other or {}
+            return bool(other.get('loading_complete', False))
+        except Exception:
+            return False
     
     async def dispatch(
         self, request: Request, call_next: Callable
@@ -149,14 +163,17 @@ class SetupRedirectMiddleware(BaseHTTPMiddleware):
                     # Handle phase query parameter
                     phase = query_params.get("phase")
                     if phase == "initial":
-                        # phase=initial should not be accessed after setup is complete
-                        # Redirect to login
-                        return RedirectResponse(url="/login", status_code=302)
+                        # Only redirect if loading has actually completed
+                        # If loading_started=True but loading_complete=False, user should stay
+                        # on loading page to see progress
+                        if self._is_loading_complete():
+                            return RedirectResponse(url="/login", status_code=302)
+                        # Otherwise, allow access to loading page (loading in progress)
                     elif not phase:
-                        # No phase specified and setup is complete
-                        # Redirect to login since user should be further in the flow
-                        return RedirectResponse(url="/login", status_code=302)
-                    # phase=nfo is allowed - it triggers the NFO scan phase
+                        # No phase specified and loading is complete
+                        if self._is_loading_complete():
+                            return RedirectResponse(url="/login", status_code=302)
+                    # phase=nfo is always allowed - it triggers the NFO scan phase
         
         # Skip setup check for exempt paths
         if self._is_path_exempt(path):

src/server/services/initialization_service.py

@@ -383,6 +383,16 @@ async def perform_initial_setup(progress_service=None):
         # Mark the initial scan as completed
         await _mark_initial_scan_completed()
 
+        # Mark loading as complete in config (used by middleware to allow redirect to /login)
+        try:
+            from src.server.services.config_service import get_config_service
+            config_svc = get_config_service()
+            init_config = config_svc.load_config()
+            init_config.other['loading_complete'] = True
+            config_svc.save_config(init_config, create_backup=False)
+        except Exception as e:
+            logger.warning("Failed to save loading_complete flag: %s", e)
+
         # Load series into memory from database
         await _load_series_into_memory(progress_service)