🤖 fix: initialize git repos in e2e fixtures

The e2e test fixtures created directories but didn't run git init,
causing listBranches() to fail with 'Not a git repository' errors.
These errors were logged but didn't fail tests since the tests don't
rely on branch-loading functionality.

Fix: run 'git init -q' for both projectPath and workspacePath so
the fixtures behave like real projects.

_Generated with mux_

Author: ibetitsmike

tests/e2e/utils/demoProject.ts

@@ -1,5 +1,6 @@
 import fs from "fs";
 import path from "path";
+import { spawnSync } from "child_process";
 import { Config } from "../../../src/node/config";
 
 export interface DemoProjectConfig {
@@ -49,6 +50,10 @@ export function prepareDemoProject(
   fs.mkdirSync(workspacePath, { recursive: true });
   fs.mkdirSync(sessionsDir, { recursive: true });
 
+  // Initialize git repos so listBranches() doesn't error
+  spawnSync("git", ["init", "-q"], { cwd: projectPath });
+  spawnSync("git", ["init", "-q"], { cwd: workspacePath });
+
   // E2E tests use legacy workspace ID format to test backward compatibility.
   // Production code now uses generateStableId() for new workspaces.
   const config = new Config(rootDir);