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, 8 insertions, 3 deletions

diff --git a/internal/api/google_tasks.go b/internal/api/google_tasks.go
index 1f9aefb..644f124 100644
--- a/internal/api/google_tasks.go
+++ b/internal/api/google_tasks.go
@@ -174,14 +174,19 @@ func (c *GoogleTasksClient) CompleteTask(ctx context.Context, listID, taskID str
 	return nil
 }
 
-// UpdateTaskNotes updates a task's notes (description)
-func (c *GoogleTasksClient) UpdateTaskNotes(ctx context.Context, listID, taskID, notes string) error {
+// UpdateTask updates a task's title and notes (description). An empty
+// title is omitted from the PATCH body by the underlying client library
+// (omitempty), not sent as a blank -- so callers that don't support editing
+// title (e.g. the widget's description-only edit popup) can pass the
+// task's existing title back unchanged, or "" to leave it untouched.
+func (c *GoogleTasksClient) UpdateTask(ctx context.Context, listID, taskID, title, notes string) error {
 	task := &tasks.Task{
+		Title: title,
 		Notes: notes,
 	}
 	_, err := c.srv.Tasks.Patch(listID, taskID, task).Context(ctx).Do()
 	if err != nil {
-		return fmt.Errorf("failed to update task notes: %v", err)
+		return fmt.Errorf("failed to update task: %v", err)
 	}
 	return nil
 }