Add Claude Desktop official preset

- Add Claude Desktop Official to the Claude Desktop preset list.
- Treat selected official presets as official mode in the form.
- Cover the official preset with a preset-order regression test.

src/components/providers/forms/ClaudeDesktopProviderForm.tsx

@@ -296,7 +296,6 @@ export function ClaudeDesktopProviderForm({
   showButtons = true,
 }: ClaudeDesktopProviderFormProps) {
   const { t } = useTranslation();
-  const isOfficial = initialData?.category === "official";
   const initialMode = initialData?.meta?.claudeDesktopMode ?? "direct";
   const [mode, setMode] = useState<"direct" | "proxy">(initialMode);
   const needsModelMapping = mode === "proxy";
@@ -412,6 +411,9 @@ export function ClaudeDesktopProviderForm({
   );
   const activeProviderType =
     activePreset?.providerType ?? initialData?.meta?.providerType;
+  const isOfficial =
+    initialData?.category === "official" ||
+    activePreset?.category === "official";
   const usesManagedOAuth =
     activePreset?.requiresOAuth === true ||
     activeProviderType === "github_copilot" ||