feat: refactor tests and improve mocking for file-service and GitHub polling

- Updated mocking strategy for node:fs and node:fs/promises in file-service tests.
- Removed redundant test files and improved test implementations for better clarity.
- Enhanced GitHub polling service tests with rate limiter integration.

packages/dashboard/app/components/__tests__/InlineCreateCard.test.tsx

@@ -17,6 +17,8 @@ vi.mock("lucide-react", () => ({
   Lightbulb: () => null,
   ListTree: () => null,
   Zap: () => null,
+  ChevronDown: () => null,
+  ChevronUp: () => null,
 }));
 
 // Mock the api module
@@ -28,6 +30,7 @@ vi.mock("../../api", () => ({
     defaultPresetBySize: {},
   }),
   uploadAttachment: vi.fn(),
+  updateGlobalSettings: vi.fn(),
 }));
 
 const MOCK_MODELS: ModelInfo[] = [