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- Improve outdated comment detection logic by removing redundant condition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/server/src/services/github-pr-comment.service.ts

@@ -0,0 +1,103 @@
+/**
+ * GitHub PR Comment Service
+ *
+ * Domain logic for resolving/unresolving PR review threads via the
+ * GitHub GraphQL API. Extracted from the route handler so the route
+ * only deals with request/response plumbing.
+ */
+
+import { spawn } from 'child_process';
+import { execEnv } from '../lib/exec-utils.js';
+
+/** Timeout for GitHub GraphQL API requests in milliseconds */
+const GITHUB_API_TIMEOUT_MS = 30000;
+
+interface GraphQLMutationResponse {
+  data?: {
+    resolveReviewThread?: {
+      thread?: { isResolved: boolean; id: string } | null;
+    } | null;
+    unresolveReviewThread?: {
+      thread?: { isResolved: boolean; id: string } | null;
+    } | null;
+  };
+  errors?: Array<{ message: string }>;
+}
+
+/**
+ * Execute a GraphQL mutation to resolve or unresolve a review thread.
+ */
+export async function executeReviewThreadMutation(
+  projectPath: string,
+  threadId: string,
+  resolve: boolean
+): Promise<{ isResolved: boolean }> {
+  const mutationName = resolve ? 'resolveReviewThread' : 'unresolveReviewThread';
+
+  const mutation = `
+    mutation ${resolve ? 'ResolveThread' : 'UnresolveThread'}($threadId: ID!) {
+      ${mutationName}(input: { threadId: $threadId }) {
+        thread {
+          id
+          isResolved
+        }
+      }
+    }`;
+
+  const variables = { threadId };
+  const requestBody = JSON.stringify({ query: mutation, variables });
+
+  // Declare timeoutId before registering the error handler to avoid TDZ confusion
+  let timeoutId: NodeJS.Timeout | undefined;
+
+  const response = await new Promise<GraphQLMutationResponse>((res, rej) => {
+    const gh = spawn('gh', ['api', 'graphql', '--input', '-'], {
+      cwd: projectPath,
+      env: execEnv,
+    });
+
+    gh.on('error', (err) => {
+      clearTimeout(timeoutId);
+      rej(err);
+    });
+
+    timeoutId = setTimeout(() => {
+      gh.kill();
+      rej(new Error('GitHub GraphQL API request timed out'));
+    }, GITHUB_API_TIMEOUT_MS);
+
+    let stdout = '';
+    let stderr = '';
+    gh.stdout.on('data', (data: Buffer) => (stdout += data.toString()));
+    gh.stderr.on('data', (data: Buffer) => (stderr += data.toString()));
+
+    gh.on('close', (code) => {
+      clearTimeout(timeoutId);
+      if (code !== 0) {
+        return rej(new Error(`gh process exited with code ${code}: ${stderr}`));
+      }
+      try {
+        res(JSON.parse(stdout));
+      } catch (e) {
+        rej(e);
+      }
+    });
+
+    gh.stdin.write(requestBody);
+    gh.stdin.end();
+  });
+
+  if (response.errors && response.errors.length > 0) {
+    throw new Error(response.errors[0].message);
+  }
+
+  const threadData = resolve
+    ? response.data?.resolveReviewThread?.thread
+    : response.data?.unresolveReviewThread?.thread;
+
+  if (!threadData) {
+    throw new Error('No thread data returned from GitHub API');
+  }
+
+  return { isResolved: threadData.isResolved };
+}