Add reusable library switcher infrastructure that can be used across
dashboard, collections list, and collection detail pages.
New files:
- templates/library_switcher.templ: Shared LibrarySwitcher component
with variadic actions slot for page-specific buttons (e.g. dashboard
settings/refresh). Includes DashboardActions sub-component.
- web/src/library-switcher.ts: Shared module providing:
- initLibrarySwitcher(): syncs dropdown with localStorage, attaches
change listener with configurable onSwitch callback
- switchWithTransition(): generic fade-out -> spinner -> fetch ->
fade-in transition used by all pages
- getCurrentLibraryId(): reads "selectedLibrary" from localStorage
Modified:
- web/src/main.ts: import new library-switcher module
- web/src/types/api.d.ts: add book_count field to CollectionData