Quick add task from the header (owner): modal, g t shortcut, auto_handle + Daisy webhook

- + button next to Dashboard (desktop and mobile sheet), lazy-loaded native <dialog>
- POST /trackers/tasks/quick inserts source 'quick-add', notes, due date, priority
- tasks.tasks.auto_handle (default false) with a Daisy badge in the tracker
- DAISY_TASK_WEBHOOK_URL/KEY/HEADER: fire-and-forget POST {task_id, title}, 3 s timeout

drizzle/20261024160855_tasks_auto_handle/migration.sql

@@ -0,0 +1 @@
+ALTER TABLE "tasks"."tasks" ADD COLUMN "auto_handle" boolean DEFAULT false NOT NULL;