feat: link dialog finds bullets of all notes; richer sample data with help notes, deep nesting and linked to-dos

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/api/handlers_tasklists.go

@@ -25,11 +25,11 @@ func (s *Server) handleGetTaskLists(w http.ResponseWriter, r *http.Request) {
 func (s *Server) handleCreateTaskList(w http.ResponseWriter, r *http.Request) {
 	userID := auth.GetUserID(r.Context())
 	var req struct {
-		SpaceID string `json:"spaceId"`
-		TeamID  string `json:"teamId"`
-		Title   string `json:"title"`
+		SpaceID string  `json:"spaceId"`
+		TeamID  string  `json:"teamId"`
+		Title   string  `json:"title"`
 		Icon    *string `json:"icon"` // "" = no icon; missing = the default
-		Color   string `json:"color"`
+		Color   string  `json:"color"`
 	}
 	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
 		writeError(w, http.StatusBadRequest, "Ungültiges JSON")