Add thread rename support

internal/store/store.go

@@ -421,6 +421,18 @@ func (s *Store) TouchThread(ctx context.Context, codexThreadID string) error {
 	return err
 }
 
+func (s *Store) RenameThread(ctx context.Context, telegramUserID, id int64, title string) error {
+	_, err := s.db.ExecContext(ctx, `
+UPDATE threads SET title = ?, updated_at = datetime('now')
+WHERE telegram_user_id = ? AND id = ?`, title, telegramUserID, id)
+	return err
+}
+
+func (s *Store) RenameThreadByCodexID(ctx context.Context, codexThreadID, title string) error {
+	_, err := s.db.ExecContext(ctx, "UPDATE threads SET title = ?, updated_at = datetime('now') WHERE codex_thread_id = ?", title, codexThreadID)
+	return err
+}
+
 func (s *Store) UpsertPendingApproval(ctx context.Context, approval PendingApproval) (PendingApproval, error) {
 	_, err := s.db.ExecContext(ctx, `
 INSERT INTO pending_approvals (

internal/store/store_test.go

@@ -120,6 +120,44 @@ func TestListThreadsPage(t *testing.T) {
 	}
 }
 
+func TestRenameThread(t *testing.T) {
+	ctx := context.Background()
+	st, err := Open(ctx, filepath.Join(t.TempDir(), "bot.db"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer st.Close()
+
+	ws, err := st.AddWorkspace(ctx, t.TempDir(), "repo", true)
+	if err != nil {
+		t.Fatal(err)
+	}
+	thread, err := st.CreateThread(ctx, 42, "codex-thread", ws.ID, "old title")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := st.RenameThread(ctx, 42, thread.ID, "new title"); err != nil {
+		t.Fatal(err)
+	}
+	thread, err = st.GetThreadByID(ctx, 42, thread.ID)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if thread.Title != "new title" {
+		t.Fatalf("title = %q", thread.Title)
+	}
+	if err := st.RenameThreadByCodexID(ctx, "codex-thread", "codex title"); err != nil {
+		t.Fatal(err)
+	}
+	thread, err = st.GetThreadByID(ctx, 42, thread.ID)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if thread.Title != "codex title" {
+		t.Fatalf("title = %q", thread.Title)
+	}
+}
+
 func TestValidateWorkspacePath(t *testing.T) {
 	if _, err := ValidateWorkspacePath("relative/path"); err == nil {
 		t.Fatal("relative path should be rejected")