feat(13-02): add library filter dropdown and wire all views to respect active filter

- Add selectedLibraryId state + ByLibrary conditional calls to library-store
- Add library filter pass-through methods to library-controller
- Create library-filter dropdown component in top bar
- Wire genre-details, cover-grid, artists-view, genres-view to use ByLibrary queries
- Update album-selection helper to respect library filter
- Regenerate Wails bindings for new ByLibrary methods
- Search remains client-side (automatically filtered by loaded data)
- Playlists remain unfiltered (use separate playlist store)

frontend/wailsjs/go/library/Library.d.ts

@@ -16,24 +16,38 @@ export function FullRescan():Promise<library.ScanMetrics>;
 
 export function GetAlbumTracks(arg1:number):Promise<Array<library.Track>>;
 
+export function GetAlbumTracksByLibrary(arg1:number,arg2:number):Promise<Array<library.Track>>;
+
 export function GetAlbumsByArtist(arg1:number):Promise<Array<library.Album>>;
 
+export function GetAlbumsByArtistByLibrary(arg1:number,arg2:number):Promise<Array<library.Album>>;
+
 export function GetAllAlbums():Promise<Array<library.Album>>;
 
+export function GetAllAlbumsByLibrary(arg1:number):Promise<Array<library.Album>>;
+
 export function GetAllArtists():Promise<Array<library.Artist>>;
 
+export function GetAllArtistsByLibrary(arg1:number):Promise<Array<library.Artist>>;
+
 export function GetAllGenresWithCounts():Promise<Array<library.GenreWithCount>>;
 
+export function GetAllGenresWithCountsByLibrary(arg1:number):Promise<Array<library.GenreWithCount>>;
+
 export function GetAllLibrariesWithTrackCounts():Promise<Array<library.Info>>;
 
 export function GetAllTracks():Promise<Array<library.Track>>;
 
+export function GetAllTracksByLibrary(arg1:number):Promise<Array<library.Track>>;
+
 export function GetRemovalImpact(arg1:number):Promise<library.RemovalImpact>;
 
 export function GetScanQueueLength():Promise<number>;
 
 export function GetTracksByGenre(arg1:string):Promise<Array<library.Track>>;
 
+export function GetTracksByGenreByLibrary(arg1:string,arg2:number):Promise<Array<library.Track>>;
+
 export function IsScanActive():Promise<boolean>;
 
 export function IsScanPaused():Promise<boolean>;
@@ -54,6 +68,8 @@ export function ScanLibrary(arg1:number):Promise<void>;
 
 export function SearchTracks(arg1:string):Promise<Array<library.Track>>;
 
+export function SearchTracksByLibrary(arg1:string,arg2:number):Promise<Array<library.Track>>;
+
 export function SetContext(arg1:context.Context):Promise<void>;
 
 export function SetRemovalHooks(arg1:library.RemovalHooks):Promise<void>;

frontend/wailsjs/go/library/Library.js

@@ -26,22 +26,42 @@ export function GetAlbumTracks(arg1) {
   return window['go']['library']['Library']['GetAlbumTracks'](arg1);
 }
 
+export function GetAlbumTracksByLibrary(arg1, arg2) {
+  return window['go']['library']['Library']['GetAlbumTracksByLibrary'](arg1, arg2);
+}
+
 export function GetAlbumsByArtist(arg1) {
   return window['go']['library']['Library']['GetAlbumsByArtist'](arg1);
 }
 
+export function GetAlbumsByArtistByLibrary(arg1, arg2) {
+  return window['go']['library']['Library']['GetAlbumsByArtistByLibrary'](arg1, arg2);
+}
+
 export function GetAllAlbums() {
   return window['go']['library']['Library']['GetAllAlbums']();
 }
 
+export function GetAllAlbumsByLibrary(arg1) {
+  return window['go']['library']['Library']['GetAllAlbumsByLibrary'](arg1);
+}
+
 export function GetAllArtists() {
   return window['go']['library']['Library']['GetAllArtists']();
 }
 
+export function GetAllArtistsByLibrary(arg1) {
+  return window['go']['library']['Library']['GetAllArtistsByLibrary'](arg1);
+}
+
 export function GetAllGenresWithCounts() {
   return window['go']['library']['Library']['GetAllGenresWithCounts']();
 }
 
+export function GetAllGenresWithCountsByLibrary(arg1) {
+  return window['go']['library']['Library']['GetAllGenresWithCountsByLibrary'](arg1);
+}
+
 export function GetAllLibrariesWithTrackCounts() {
   return window['go']['library']['Library']['GetAllLibrariesWithTrackCounts']();
 }
@@ -50,6 +70,10 @@ export function GetAllTracks() {
   return window['go']['library']['Library']['GetAllTracks']();
 }
 
+export function GetAllTracksByLibrary(arg1) {
+  return window['go']['library']['Library']['GetAllTracksByLibrary'](arg1);
+}
+
 export function GetRemovalImpact(arg1) {
   return window['go']['library']['Library']['GetRemovalImpact'](arg1);
 }
@@ -62,6 +86,10 @@ export function GetTracksByGenre(arg1) {
   return window['go']['library']['Library']['GetTracksByGenre'](arg1);
 }
 
+export function GetTracksByGenreByLibrary(arg1, arg2) {
+  return window['go']['library']['Library']['GetTracksByGenreByLibrary'](arg1, arg2);
+}
+
 export function IsScanActive() {
   return window['go']['library']['Library']['IsScanActive']();
 }
@@ -102,6 +130,10 @@ export function SearchTracks(arg1) {
   return window['go']['library']['Library']['SearchTracks'](arg1);
 }
 
+export function SearchTracksByLibrary(arg1, arg2) {
+  return window['go']['library']['Library']['SearchTracksByLibrary'](arg1, arg2);
+}
+
 export function SetContext(arg1) {
   return window['go']['library']['Library']['SetContext'](arg1);
 }