fix(v8): preserve migrated config and correct provider requests

- Preserve provider credentials, aliases, headers, and network settings during migration
- Normalize Claude cloak metadata and repair previously saved invalid types
- Use streaming Gemini health probes and honor group and key proxy settings
- Retain Codex customizations for temporarily unavailable models
- Add regression tests for migration, metadata, proxy routing, and catalog persistence

src/components/AuthFileSettingsDialog.tsx

@@ -30,7 +30,7 @@ export function AuthFileSettingsDialog({ name, onClose, onSaved }: {
   const [error, setError] = useState('');
   const [discard, setDiscard] = useState(false);
   const [attempt, setAttempt] = useState(0);
-  const dirty = draft !== null && JSON.stringify(draft) !== JSON.stringify(original);
+  const dirty = draft !== null && (Boolean(draft.normalizeCloakMetadata?.length) || JSON.stringify(draft) !== JSON.stringify(original));
 
   useEffect(() => {
     const previousFocus = document.activeElement;