feat(setup): add done button and integrate NFO scan into initialization

- Add /api/setup/unresolved/done endpoint to mark phase complete
- NFO scan now runs after series sync during initialization
- Middleware redirects to /login after setup complete (was /loading)
- Done button allows skipping folder resolution with redirect to NFO scan phase

src/server/middleware/setup_redirect.py

@@ -105,6 +105,20 @@ class SetupRedirectMiddleware(BaseHTTPMiddleware):
         
         return False
     
+    def _is_unresolved_completed(self) -> bool:
+        """Check if the unresolved phase has been completed.
+        
+        Returns:
+            True if unresolved phase is complete, False otherwise
+        """
+        try:
+            config_service = get_config_service()
+            config = config_service.load_config()
+            other = config.other or {}
+            return bool(other.get('unresolved_completed', False))
+        except Exception:
+            return False
+    
     async def dispatch(
         self, request: Request, call_next: Callable
     ) -> Response:
@@ -120,13 +134,17 @@ class SetupRedirectMiddleware(BaseHTTPMiddleware):
         path = request.url.path
         
         # Check if trying to access setup or loading page after completion
-        if path in ("/setup", "/loading"):
+        if path in ("/setup", "/loading", "/setup/unresolved"):
             if not self._needs_setup():
-                # Setup is complete, check loading status
                 if path == "/setup":
                     # Redirect to loading if initialization is in progress
                     # Otherwise redirect to login
                     return RedirectResponse(url="/login", status_code=302)
+                elif path == "/setup/unresolved":
+                    # Check if unresolved phase is already completed
+                    if self._is_unresolved_completed():
+                        # Redirect to loading - unresolved phase already done
+                        return RedirectResponse(url="/loading", status_code=302)
                 elif path == "/loading":
                     # Always allow access to loading page - it handles its own
                     # redirect flow via WebSocket events (initialization_complete