Add inline title/description editing and list delete to the list view

ListView: the title and description are now inline-editable fields saved on
blur via PATCH /api/lists/:id; an empty description shows an "Add a
description" placeholder. A "Manage" menu in the top right (click-outside and
Esc to close) holds a "Delete list" action that opens a confirmation modal;
confirming calls DELETE and routes back to the all-lists view. No backend
change — the existing PATCH/DELETE endpoints cover it.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

web/README.md

@@ -47,10 +47,16 @@ src/views/              HomeView (lists), ListView (items), LoginView, RegisterV
 
 ## List detail
 
-`/lists/:id` shows one list's items. Each row is a checkbox, an inline-editable
-text field (saved on blur), a delete button, and a drag handle. Reordering uses
-`vuedraggable`; on drop the whole new order is persisted via
-`PUT /api/lists/:id/items/order`, and the server response replaces local state.
+`/lists/:id` shows one list. The title and description are inline-editable
+(saved on blur via `PATCH /api/lists/:id`; the description shows an "Add a
+description" placeholder when empty). A **Manage** menu (top right) has a
+**Delete list** action that opens a confirmation modal; confirming calls
+`DELETE /api/lists/:id` and returns to the all-lists view.
+
+Each item row is a checkbox, an inline-editable text field (saved on blur), a
+delete button, and a drag handle. Reordering uses `vuedraggable`; on drop the
+whole new order is persisted via `PUT /api/lists/:id/items/order`, and the
+server response replaces local state.
 
 ## Auth flow