feat(ui): add OpenClaw support to frontend components

- Update App.tsx with openclaw visibility and skills fallback
- Add OpenClaw to AppSwitcher icon and display name maps
- Update McpFormModal with openclaw in enabled apps
- Update PromptFormModal/Panel with openclaw filename map
- Update EndpointSpeedTest with openclaw timeout
- Update AppVisibilitySettings with openclaw toggle
- Update test state with openclaw defaults

src/components/settings/AppVisibilitySettings.tsx

@@ -20,6 +20,7 @@ const APP_CONFIG: Array<{
   { id: "codex", icon: "openai", nameKey: "apps.codex" },
   { id: "gemini", icon: "gemini", nameKey: "apps.gemini" },
   { id: "opencode", icon: "opencode", nameKey: "apps.opencode" },
+  { id: "openclaw", icon: "openclaw", nameKey: "apps.openclaw" },
 ];
 
 export function AppVisibilitySettings({
@@ -33,6 +34,7 @@ export function AppVisibilitySettings({
     codex: true,
     gemini: true,
     opencode: true,
+    openclaw: true,
   };
 
   // Count how many apps are currently visible