feat: journal dashboard widgets, agent polish, and edit-mode live previews

Journal dashboard widgets and quick-add; rich-text quick-add dialogs.

Dashboard draft sync for live edit previews; assistant bubble + API tools.

Journal UX: stress slider, mood grid, query cap fix.

docs/tasks/81-dashboard-edit-live-widgets.md

@@ -25,9 +25,9 @@ Edit mode currently shows empty placeholders; on save, content-heavy widgets (e.
 
 ## Acceptance criteria
 
-- [ ] Edit mode shows real widget content for registered widgets.
-- [ ] Saving layout does not cause a large content-driven reflow for content-heavy widgets.
-- [ ] E2E covers real content visible in edit mode.
+- [x] Edit mode shows real widget content for registered widgets.
+- [x] Saving layout does not cause a large content-driven reflow for content-heavy widgets.
+- [x] E2E covers real content visible in edit mode.
 
 ## Notes