Fix blank task-detail modal for Google Tasks

loadTaskDetailData/HandleUpdateTask only had cases for "trello" and
"doot" sources, so opening a gtask from the Tasks or Timeline tab
rendered an empty title/description. Reuses the existing
findGoogleTask cache lookup for both. Renamed the API client's
UpdateTaskNotes to UpdateTask(title, notes) so the web modal can save
an edited title too, not just description; the widget's
description-only edit popup now just round-trips the task's existing
title unchanged.

1 files changed, 22 insertions, 0 deletions

diff --git a/internal/handlers/handlers.go b/internal/handlers/handlers.go
index 30aaf67..7220474 100644
--- a/internal/handlers/handlers.go
+++ b/internal/handlers/handlers.go
@@ -832,6 +832,10 @@ func (h *Handler) loadTaskDetailData(id, source string) taskDetailData {
 			data.RecurrenceInterval = task.RecurrenceInterval
 			data.RecurrenceWeekdays = task.RecurrenceWeekdays
 		}
+	case "gtasks":
+		if t, ok := h.findGoogleTask(id); ok {
+			data.Title, data.Description = t.Title, t.Notes
+		}
 	}
 	return data
 }
@@ -975,6 +979,24 @@ func (h *Handler) HandleUpdateTask(w http.ResponseWriter, r *http.Request) {
 			updates["name"] = title
 		}
 		err = h.trelloClient.UpdateCard(r.Context(), id, updates)
+	case "gtasks":
+		if h.googleTasksClient == nil {
+			JSONError(w, http.StatusServiceUnavailable, "Google Tasks not configured", nil)
+			return
+		}
+		t, ok := h.findGoogleTask(id)
+		if !ok {
+			JSONError(w, http.StatusNotFound, "task not found", nil)
+			return
+		}
+		saveTitle := title
+		if saveTitle == "" {
+			saveTitle = t.Title
+		}
+		err = h.googleTasksClient.UpdateTask(r.Context(), t.ListID, id, saveTitle, description)
+		if err == nil {
+			_ = h.store.InvalidateCache(store.CacheKeyGoogleTasks)
+		}
 	default:
 		JSONError(w, http.StatusBadRequest, "Unknown source", nil)
 		return