Add global web nav with project groups and tree sidebar.

Restructure the UI into top-level tabs and a scrollable project tree, and persist optional project groups so demos and settings can organize many projects.

Co-authored-by: Cursor <cursoragent@cursor.com>

internal/sqlite/projects.go

@@ -22,17 +22,29 @@ func NewProjectStore(db *DB) *ProjectStore {
 	return &ProjectStore{db: db}
 }
 
+func scanProject(scanner interface{ Scan(dest ...any) error }) (project.Project, error) {
+	var p project.Project
+	var groupID sql.NullString
+	if err := scanner.Scan(&p.ID, &p.Name, &groupID); err != nil {
+		return project.Project{}, err
+	}
+	if groupID.Valid {
+		p.GroupID = groupID.String
+	}
+	return p, nil
+}
+
 // List returns all projects sorted by name.
 func (s *ProjectStore) List() ([]project.Project, error) {
-	rows, err := s.db.SQL.Query(`SELECT id, name FROM projects ORDER BY name COLLATE NOCASE`)
+	rows, err := s.db.SQL.Query(`SELECT id, name, group_id FROM projects ORDER BY name COLLATE NOCASE`)
 	if err != nil {
 		return nil, fmt.Errorf("list projects: %w", err)
 	}
 	defer rows.Close()
 	var out []project.Project
 	for rows.Next() {
-		var p project.Project
-		if err := rows.Scan(&p.ID, &p.Name); err != nil {
+		p, err := scanProject(rows)
+		if err != nil {
 			return nil, err
 		}
 		out = append(out, p)
@@ -70,7 +82,7 @@ func (s *ProjectStore) Create(id, name string) (project.Project, error) {
 		id = uuid.NewString()
 	}
 	now := formatTime(time.Now().UTC())
-	_, err := s.db.SQL.Exec(`INSERT INTO projects(id, name, created_at, updated_at) VALUES(?, ?, ?, ?)`,
+	_, err := s.db.SQL.Exec(`INSERT INTO projects(id, name, created_at, updated_at, group_id) VALUES(?, ?, ?, ?, NULL)`,
 		id, name, now, now)
 	if err != nil {
 		return project.Project{}, fmt.Errorf("create project: %w", err)
@@ -78,6 +90,31 @@ func (s *ProjectStore) Create(id, name string) (project.Project, error) {
 	return project.Project{ID: id, Name: name}, nil
 }
 
+// SetGroup assigns a project to a group. Empty groupID clears the assignment.
+func (s *ProjectStore) SetGroup(id, groupID string) error {
+	id = strings.TrimSpace(id)
+	groupID = strings.TrimSpace(groupID)
+	if id == "" {
+		return fmt.Errorf("project id is required")
+	}
+	var arg any
+	if groupID == "" {
+		arg = nil
+	} else {
+		arg = groupID
+	}
+	res, err := s.db.SQL.Exec(`UPDATE projects SET group_id = ?, updated_at = ? WHERE id = ?`,
+		arg, formatTime(time.Now().UTC()), id)
+	if err != nil {
+		return fmt.Errorf("set project group: %w", err)
+	}
+	n, _ := res.RowsAffected()
+	if n == 0 {
+		return fmt.Errorf("project %s: not found", id)
+	}
+	return nil
+}
+
 // Rename updates the display name.
 func (s *ProjectStore) Rename(id, name string) error {
 	name = strings.TrimSpace(name)
@@ -114,8 +151,7 @@ func (s *ProjectStore) Delete(id string) error {
 
 // Get returns one project.
 func (s *ProjectStore) Get(id string) (project.Project, error) {
-	var p project.Project
-	err := s.db.SQL.QueryRow(`SELECT id, name FROM projects WHERE id = ?`, id).Scan(&p.ID, &p.Name)
+	p, err := scanProject(s.db.SQL.QueryRow(`SELECT id, name, group_id FROM projects WHERE id = ?`, id))
 	if err == sql.ErrNoRows {
 		return project.Project{}, fmt.Errorf("project %s: not found", id)
 	}
@@ -255,7 +291,7 @@ func (s *ProjectStore) ListIDsForUser(userID string, isAdmin bool) ([]project.Pr
 		return s.List()
 	}
 	rows, err := s.db.SQL.Query(`
-		SELECT p.id, p.name FROM projects p
+		SELECT p.id, p.name, p.group_id FROM projects p
 		INNER JOIN project_members m ON m.project_id = p.id
 		WHERE m.user_id = ?
 		ORDER BY p.name COLLATE NOCASE`, userID)
@@ -265,8 +301,8 @@ func (s *ProjectStore) ListIDsForUser(userID string, isAdmin bool) ([]project.Pr
 	defer rows.Close()
 	var out []project.Project
 	for rows.Next() {
-		var p project.Project
-		if err := rows.Scan(&p.ID, &p.Name); err != nil {
+		p, err := scanProject(rows)
+		if err != nil {
 			return nil, err
 		}
 		out = append(out, p)