feat(worktree): enhance worktree management and git diff functionality

- Integrated git worktree isolation for feature execution, allowing agents to work in isolated branches.
- Added GitDiffPanel component to visualize changes in both worktree and main project contexts.
- Updated AutoModeService and IPC handlers to support worktree settings.
- Implemented Git API for non-worktree operations, enabling file diff retrieval for the main project.
- Enhanced UI components to reflect worktree settings and improve user experience.

These changes provide a more robust and flexible environment for feature development and testing.

app/src/types/electron.d.ts

@@ -229,7 +229,7 @@ export interface AutoModeAPI {
     error?: string;
   }>;
 
-  runFeature: (projectPath: string, featureId: string) => Promise<{
+  runFeature: (projectPath: string, featureId: string, useWorktrees?: boolean) => Promise<{
     success: boolean;
     passes?: boolean;
     error?: string;
@@ -386,6 +386,9 @@ export interface ElectronAPI {
 
   // Worktree Management APIs
   worktree: WorktreeAPI;
+
+  // Git Operations APIs (for non-worktree operations)
+  git: GitAPI;
 }
 
 export interface WorktreeInfo {
@@ -470,6 +473,14 @@ export interface WorktreeAPI {
   getFileDiff: (projectPath: string, featureId: string, filePath: string) => Promise<FileDiffResult>;
 }
 
+export interface GitAPI {
+  // Get diffs for the main project (not a worktree)
+  getDiffs: (projectPath: string) => Promise<FileDiffsResult>;
+
+  // Get diff for a specific file in the main project
+  getFileDiff: (projectPath: string, filePath: string) => Promise<FileDiffResult>;
+}
+
 // Model definition type
 export interface ModelDefinition {
   id: string;