chore: Fix all 246 TypeScript errors in UI

- Extended SetupAPI interface with 20+ missing methods for Cursor, Codex,
  OpenCode, Gemini, and Copilot CLI integrations
- Fixed WorktreeInfo type to include isCurrent and hasWorktree fields
- Added null checks for optional API properties across all hooks
- Fixed Feature type conflicts between @automaker/types and local definitions
- Added missing CLI status hooks for all providers
- Fixed type mismatches in mutation callbacks and event handlers
- Removed dead code referencing non-existent GlobalSettings properties
- Updated mock implementations in electron.ts for all new API methods

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/ui/src/hooks/queries/use-git.ts

@@ -22,6 +22,9 @@ export function useGitDiffs(projectPath: string | undefined, enabled = true) {
     queryFn: async () => {
       if (!projectPath) throw new Error('No project path');
       const api = getElectronAPI();
+      if (!api.git) {
+        throw new Error('Git API not available');
+      }
       const result = await api.git.getDiffs(projectPath);
       if (!result.success) {
         throw new Error(result.error || 'Failed to fetch diffs');