Allow deleting projects from the project picker with x/X.

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

internal/ticket/jsontimestore.go

@@ -153,6 +153,28 @@ func (s *JSONTimeStore) Delete(id string) error {
 	return s.writeUnlocked(out)
 }
 
+// DeleteByProject removes all time entries for a project.
+func (s *JSONTimeStore) DeleteByProject(projectID string) error {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	if projectID == "" {
+		return fmt.Errorf("projectId is required")
+	}
+	entries, err := s.readUnlocked()
+	if err != nil {
+		return err
+	}
+	out := make([]TimeEntry, 0, len(entries))
+	for _, e := range entries {
+		if e.ProjectID == projectID {
+			continue
+		}
+		out = append(out, e)
+	}
+	return s.writeUnlocked(out)
+}
+
 // SumByTicket returns total duration for a ticket.
 func (s *JSONTimeStore) SumByTicket(ticketID string) (time.Duration, error) {
 	entries, err := s.ListByTicket(ticketID)