feat(ui): add desktop git sidebar + terminal dock and improve in-app PR workflow (#362)

* feat: add unified dropdown with services content in header

* feat: add right Git sidebar with resizable panel

* feat: implement responsive panel auto-toggle and terminal rehydration

- Auto-close the right sidebar when width is below a threshold and auto-open it when space permits
- Auto-close the bottom terminal when height is below a threshold and auto-open it when enough space
- Apply a dedicated rehydrated streaming configuration for terminal sessions to optimize reconnect behavior

* feat: enhance PR view with status caching and annotations

* feat(ui): enable chat dispatch in PullRequestSection

* feat(TerminalView): adjust layout

* feat: refine chat input layout and text selection menu

* fix(ui): show empty state in GitView when no changes

* feat(git): update PR actions styling and create PR button

packages/vscode/src/bridge.ts

@@ -32,6 +32,7 @@ import {
   getPullRequestStatus,
   markPullRequestReady,
   mergePullRequest,
+  updatePullRequest,
 } from './githubPr';
 
 import {
@@ -1393,6 +1394,36 @@ export async function handleBridgeMessage(message: BridgeRequest, ctx?: BridgeCo
         }
       }
 
+      case 'api:github/pr:update': {
+        const context = ctx?.context;
+        if (!context) return { id, type, success: false, error: 'Missing VS Code context' };
+        const stored = await readGitHubAuth(context);
+        if (!stored?.accessToken) return { id, type, success: false, error: 'GitHub not connected' };
+        const directory = readStringField(payload, 'directory');
+        const number = readNumberField(payload, 'number') ?? 0;
+        const title = readStringField(payload, 'title');
+        const body = readStringField(payload, 'body');
+        if (!directory || !number || !title) {
+          return { id, type, success: false, error: 'directory, number, title are required' };
+        }
+        try {
+          const pr = await updatePullRequest(stored.accessToken, directory, {
+            directory,
+            number,
+            title,
+            ...(typeof body === 'string' ? { body } : {}),
+          });
+          return { id, type, success: true, data: pr };
+        } catch (error: unknown) {
+          const status = (error && typeof error === 'object' && 'status' in error) ? (error as { status?: number }).status : undefined;
+          const message = error instanceof Error ? error.message : String(error);
+          if (status === 401 || message === 'unauthorized') {
+            await clearGitHubAuth(context);
+          }
+          return { id, type, success: false, error: message };
+        }
+      }
+
       case 'api:github/pr:merge': {
         const context = ctx?.context;
         if (!context) return { id, type, success: false, error: 'Missing VS Code context' };