Checkpoint web-player design-system refactor and backend track genre tagging

Advances the ongoing token/componentization cleanup (anchored player dock,
border-based panels instead of floating shadows, corrected light-mode
accent/gradient tokens) alongside in-progress backend support for track
genre tags.

web-player/src/routes/(app)/library/+page.svelte

@@ -51,9 +51,9 @@
 			index
 			action
 			meta={[
-				{ label: 'Álbum', width: '160px' },
-				{ label: 'Subida', width: '100px' },
-				{ label: 'Escuchas', width: '100px' }
+				{ label: 'Álbum', width: '76px' },
+				{ label: 'Subida', width: '124px' },
+				{ label: 'Escuchas', width: '106px' }
 			]}
 			class="mt-7 sm:mt-8"
 		>