Introduces inline editing for oneliner text within the case list. This
feature allows users to directly modify oneliner entries in the UI, with
changes being optimistically applied locally and then asynchronously
sent to the server.
Includes:
- New `OnelinerEditState` to manage the editing buffer and focus.
- `SaveResult` struct to communicate the outcome of background save
operations.
- UI logic to toggle between read and edit modes for oneliner entries.
- Handling of keyboard inputs (Enter, Esc) and button clicks for saving
or canceling edits.
- Toast banner to display save errors to the user.
- Asynchronous `put_oneliner` calls for background server updates.
- Local storage update for optimistic UI updates.
Brummel
d732fdd8ec