Update CollectionDetail template to enable book picker:
Enable Add Books button:
- Remove disabled attribute and inline JavaScript handlers
- Wire to $store.bookPicker.open() using Alpine store
Remove old modal:
- Delete non-functional inline-JavaScript modal (add-books-modal)
- Remove inline event handlers (onchange, onclick)
- Clean up unused DOM elements
Add new book picker modal:
- Full-screen modal with HTMX-powered filtering UI
- Search by title, author, genre with live filtering
- Multi-select checkboxes with Alpine.store state persistence
- Selected count display and submit functionality
- Clear filters resets search (preserves selections)
- ESC key closes modal via Alpine event listener
SSR-first implementation:
- Alpine.store.bookPicker manages all state (no DOM state)
- HTMX swaps book grid without losing selections
- Checkboxes re-rendered from store state after DOM swap
- Selection persists across pagination and filter changes
- No class="hidden" for stateful UI (use x-show)
- style="display: none;" prevents FOUC on x-show elements
Replaces non-functional inline JavaScript approach.
Matches bookshelf filtering UX for consistency.
Changes to collections_templ.go are auto-generated from .templ file.