Add GitHub integration for PRs, issues and AI PR description (#205)

* feat: integrate GitHub OAuth device flow across runtimes

Add GitHub OAuth device flow endpoints across runtimes
Introduce GitHubSettings UI panel and sidebar entry
Persist GitHub auth state in per-runtime storage

* feat: add GitHub PR status and PR description generation

Show PR status for the current branch in the Git view
Generate a pull request description from the diff between base and head
Expose prStatus, prCreate, and prMerge APIs in web and desktop clients

* feat: add GitHub PR ready for review

Add API to mark pull requests as ready for review
Show a Ready button for draft PRs and reflect status in UI
Handle token expiration and GraphQL errors when marking ready

packages/ui/src/components/views/GitView.tsx

@@ -5,6 +5,7 @@ import { useFireworksCelebration } from '@/contexts/FireworksContext';
 import type { GitIdentityProfile, CommitFileEntry } from '@/lib/api/types';
 import { useGitIdentitiesStore } from '@/stores/useGitIdentitiesStore';
 import { useDirectoryStore } from '@/stores/useDirectoryStore';
+import { useProjectsStore } from '@/stores/useProjectsStore';
 import {
   useGitStore,
   useGitStatus,
@@ -39,6 +40,7 @@ import { GitEmptyState } from './git/GitEmptyState';
 import { ChangesSection } from './git/ChangesSection';
 import { CommitSection } from './git/CommitSection';
 import { HistorySection } from './git/HistorySection';
+import { PullRequestSection } from './git/PullRequestSection';
 
 type SyncAction = 'fetch' | 'pull' | 'push' | null;
 type CommitAction = 'commit' | 'commitAndPush' | null;
@@ -231,6 +233,15 @@ export const GitView: React.FC = () => {
 
   const settingsGitmojiEnabled = useConfigStore((state) => state.settingsGitmojiEnabled);
 
+  const activeProject = useProjectsStore((state) => state.getActiveProject());
+  const baseBranch = React.useMemo(() => {
+    const fromProject = activeProject?.worktreeDefaults?.baseBranch;
+    if (typeof fromProject === 'string' && fromProject.trim().length > 0) {
+      return fromProject.trim();
+    }
+    return 'main';
+  }, [activeProject?.worktreeDefaults?.baseBranch]);
+
   const [commitMessage, setCommitMessage] = React.useState(
     initialSnapshot?.commitMessage ?? ''
   );
@@ -1038,6 +1049,14 @@ export const GitView: React.FC = () => {
               )}
             </div>
 
+            {currentDirectory && status?.current ? (
+              <PullRequestSection
+                directory={currentDirectory}
+                branch={status.current}
+                baseBranch={baseBranch}
+              />
+            ) : null}
+
             {/* History below, constrained width */}
             <HistorySection
               log={log}