feat(app): checkout diff pane styling and e2e test support

- Style diff file cards edge-to-edge with single divider between files
- Remove monospace font from filenames for better readability
- Add checkout-ship e2e test for app
- Export Page type from e2e fixtures
- Add checkout query hooks for diff, status, and PR status

packages/app/e2e/helpers/workspace.ts

@@ -5,20 +5,57 @@ import path from 'node:path';
 
 type TempRepo = {
   path: string;
+  owner?: string;
+  name?: string;
   cleanup: () => Promise<void>;
 };
 
-export const createTempGitRepo = async (prefix = 'paseo-e2e-'): Promise<TempRepo> => {
+export const createTempGitRepo = async (
+  prefix = 'paseo-e2e-',
+  options?: { withRemote?: boolean }
+): Promise<TempRepo> => {
   const repoPath = await mkdtemp(path.join(tmpdir(), prefix));
+  const repoName = `paseo-e2e-${Date.now().toString(36)}-${Math.random()
+    .toString(36)
+    .slice(2, 8)}`;
+  let owner: string | undefined;
+  const withRemote = options?.withRemote ?? false;
 
-  execSync('git init', { cwd: repoPath, stdio: 'ignore' });
+  execSync('git init -b main', { cwd: repoPath, stdio: 'ignore' });
+  execSync('git config user.email "e2e@paseo.test"', { cwd: repoPath, stdio: 'ignore' });
+  execSync('git config user.name "Paseo E2E"', { cwd: repoPath, stdio: 'ignore' });
   await writeFile(path.join(repoPath, 'README.md'), '# Temp Repo\n');
   execSync('git add README.md', { cwd: repoPath, stdio: 'ignore' });
   execSync('git commit -m "Initial commit"', { cwd: repoPath, stdio: 'ignore' });
 
+  if (withRemote) {
+    try {
+      owner = execSync('gh api user -q .login', { encoding: 'utf8' }).trim();
+      execSync(
+        `gh repo create ${repoName} --private --confirm --source=. --remote=origin --push`,
+        {
+          cwd: repoPath,
+          stdio: 'ignore',
+        }
+      );
+    } catch (error) {
+      await rm(repoPath, { recursive: true, force: true });
+      throw error;
+    }
+  }
+
   return {
     path: repoPath,
+    owner,
+    name: repoName,
     cleanup: async () => {
+      if (owner && withRemote) {
+        try {
+          execSync(`gh repo delete ${owner}/${repoName} --yes`, { stdio: 'ignore' });
+        } catch {
+          // Best-effort cleanup
+        }
+      }
       await rm(repoPath, { recursive: true, force: true });
     },
   };