Feature: Add PR review comments and resolution, improve AI prompt handling (#790)

* feat: Add PR review comments and resolution endpoints, improve prompt handling

* Feature: File Editor (#789)

* feat: Add file management feature

* feat: Add auto-save functionality to file editor

* fix: Replace HardDriveDownload icon with Save icon for consistency

* fix: Prevent recursive copy/move and improve shell injection prevention

* refactor: Extract editor settings form into separate component

* ```
fix: Improve error handling and stabilize async operations

- Add error event handlers to GraphQL process spawns to prevent unhandled rejections
- Replace execAsync with execFile for safer command execution and better control
- Fix timeout cleanup in withTimeout generator to prevent memory leaks
- Improve outdated comment detection logic by removing redundant condition
- Use resolveModelString for consistent model string handling
- Replace || with ?? for proper falsy value handling in dialog initialization
- Add comments clarifying branch name resolution logic for local branches with slashes
- Add catch handler for project selection to handle async errors gracefully
```

* refactor: Extract PR review comments logic to dedicated service

* fix: Improve robustness and UX for PR review and file operations

* fix: Consolidate exec utilities and improve type safety

* refactor: Replace ScrollArea with div and improve file tree layout

apps/ui/src/lib/electron.ts

@@ -313,6 +313,34 @@ export interface GitHubRemoteStatus {
   repo: string | null;
 }
 
+/** A review comment on a pull request (inline code comment or general PR comment) */
+export interface PRReviewComment {
+  id: string;
+  author: string;
+  avatarUrl?: string;
+  body: string;
+  /** File path for inline review comments */
+  path?: string;
+  /** Line number for inline review comments */
+  line?: number;
+  createdAt: string;
+  updatedAt?: string;
+  /** Whether this is an inline code review comment (vs general PR comment) */
+  isReviewComment: boolean;
+  /** Whether this comment is outdated (code has changed since) */
+  isOutdated?: boolean;
+  /** Whether the review thread containing this comment has been resolved */
+  isResolved?: boolean;
+  /** The GraphQL node ID of the review thread (used for resolve/unresolve mutations) */
+  threadId?: string;
+  /** The diff hunk context for the comment */
+  diffHunk?: string;
+  /** The side of the diff (LEFT or RIGHT) */
+  side?: string;
+  /** The commit ID the comment was made on */
+  commitId?: string;
+}
+
 export interface GitHubAPI {
   checkRemote: (projectPath: string) => Promise<{
     success: boolean;
@@ -389,6 +417,26 @@ export interface GitHubAPI {
     endCursor?: string;
     error?: string;
   }>;
+  /** Fetch review comments for a specific pull request */
+  getPRReviewComments: (
+    projectPath: string,
+    prNumber: number
+  ) => Promise<{
+    success: boolean;
+    comments?: PRReviewComment[];
+    totalCount?: number;
+    error?: string;
+  }>;
+  /** Resolve or unresolve a PR review thread */
+  resolveReviewThread: (
+    projectPath: string,
+    threadId: string,
+    resolve: boolean
+  ) => Promise<{
+    success: boolean;
+    isResolved?: boolean;
+    error?: string;
+  }>;
 }
 
 // Spec Regeneration types
@@ -3980,6 +4028,21 @@ function createMockGitHubAPI(): GitHubAPI {
         hasNextPage: false,
       };
     },
+    getPRReviewComments: async (projectPath: string, prNumber: number) => {
+      console.log('[Mock] Getting PR review comments:', { projectPath, prNumber });
+      return {
+        success: true,
+        comments: [],
+        totalCount: 0,
+      };
+    },
+    resolveReviewThread: async (projectPath: string, threadId: string, resolve: boolean) => {
+      console.log('[Mock] Resolving review thread:', { projectPath, threadId, resolve });
+      return {
+        success: true,
+        isResolved: resolve,
+      };
+    },
   };
 }