fix: use explicit main branch in e2e test git init (Refs: beans-iv91) (#137)

## Summary

- Fix all 13 workspace e2e tests that have been failing on CI since
March 12
- The e2e fixtures called `git init` without specifying a branch name;
on CI (Ubuntu), git defaults to `master`, but the app's worktree base
ref defaults to `main`
- `git worktree add ... main` failed because the `main` ref didn't
exist, causing the `createWorktree` mutation to error silently and
navigation to never happen

## Test plan

- [x] All 52 e2e tests pass locally
- [ ] CI passes on this PR (the whole point of this fix)

Author: hmans

.beans/beans-iv91--fix-e2e-tests-failing-on-ci-due-to-git-default-bra.md

@@ -0,0 +1,17 @@
+---
+# beans-iv91
+title: Fix e2e tests failing on CI due to git default branch name
+status: completed
+type: bug
+priority: normal
+created_at: 2026-03-17T16:16:44Z
+updated_at: 2026-03-17T16:18:01Z
+---
+
+E2e tests fail on CI because git init creates 'master' branch on Ubuntu while the app expects 'main'. The fix is to use git init -b main in the e2e fixtures.
+
+## Summary of Changes
+
+The e2e test fixtures in `frontend/e2e/fixtures.ts` used `git init` without specifying a branch name. On macOS, git defaults to `main`, but on CI (Ubuntu), git defaults to `master`. Since the app's worktree base ref defaults to `main`, the `git worktree add ... main` command failed silently, causing the `createWorktree` mutation to error and navigation to never happen.
+
+Fixed by adding `-b main` to both `git init` calls in the fixtures (template creation and per-test repo creation).

frontend/e2e/fixtures.ts

@@ -34,7 +34,7 @@ function getBinaries() {
  */
 function createBeansTemplate(beansBin: string): string {
   const templateDir = mkdtempSync(join(tmpdir(), 'beans-e2e-template-'));
-  execFileSync('git', ['init'], { cwd: templateDir, timeout: 10_000 });
+  execFileSync('git', ['init', '-b', 'main'], { cwd: templateDir, timeout: 10_000 });
   execFileSync('git', ['commit', '--allow-empty', '-m', 'init'], {
     cwd: templateDir,
     timeout: 10_000,
@@ -187,7 +187,7 @@ export const test = base.extend<Fixtures, WorkerFixtures>({
 
     // Fresh git repo per test (needed for worktree operations)
     const projectDir = mkdtempSync(join(tmpdir(), 'beans-e2e-'));
-    execFileSync('git', ['init'], { cwd: projectDir, timeout: 10_000 });
+    execFileSync('git', ['init', '-b', 'main'], { cwd: projectDir, timeout: 10_000 });
     execFileSync('git', ['commit', '--allow-empty', '-m', 'init'], {
       cwd: projectDir,
       timeout: 10_000,

frontend/e2e/workspace-create.spec.ts

@@ -60,11 +60,15 @@ test.describe('Workspace creation', () => {
     // Wait for a second workspace to appear
     await expect(workspaceLabels).toHaveCount(3, { timeout: 10_000 }); // main + 2 new
 
-    const secondName = await workspaceLabels.nth(2).textContent();
-
-    expect(firstName).toBeTruthy();
-    expect(secondName).toBeTruthy();
-    expect(firstName).not.toBe(secondName);
+    // Collect all non-main workspace names (order may vary due to LastActiveAt sorting)
+    const allNames: string[] = [];
+    for (let i = 0; i < 3; i++) {
+      const name = await workspaceLabels.nth(i).textContent();
+      if (name && name !== 'main') allNames.push(name);
+    }
+
+    expect(allNames).toHaveLength(2);
+    expect(allNames[0]).not.toBe(allNames[1]);
   });
 
   test('destroy worktree removes it from sidebar', async ({ beans, page }) => {

internal/gitutil/status_test.go

@@ -254,7 +254,7 @@ func initBranchedTestRepo(t *testing.T) string {
 
 	// Create the "remote" bare repo
 	bare := t.TempDir()
-	cmd := exec.Command("git", "init", "--bare")
+	cmd := exec.Command("git", "init", "--bare", "-b", "main")
 	cmd.Dir = bare
 	if out, err := cmd.CombinedOutput(); err != nil {
 		t.Fatalf("git init --bare failed: %s: %v", out, err)

internal/gitutil/worktree_test.go

@@ -12,7 +12,7 @@ func initTestRepo(t *testing.T) string {
 	dir := t.TempDir()
 
 	commands := [][]string{
-		{"git", "init"},
+		{"git", "init", "-b", "main"},
 		{"git", "config", "user.email", "test@test.com"},
 		{"git", "config", "user.name", "Test"},
 		{"git", "commit", "--allow-empty", "-m", "initial"},