Exclude generated bindings.ts from Tailwind content scan

Tailwind v4 auto-scans all source files; the 3000-line generated bindings.ts has
no CSS classes and a large generated TS file can confuse class detection. Add an
@source not exclusion.

src/app.css

@@ -1,5 +1,10 @@
 @import "tailwindcss";
 
+/* Exclude the generated tauri-specta bindings from Tailwind's content scan.
+   It contains no CSS classes (only TS types/command wrappers), and scanning a
+   large generated file can confuse Tailwind v4's automatic class detection. */
+@source not "./lib/api/bindings.ts";
+
 /* Custom theme variables for JellyTau */
 @theme {
   --color-jellyfin: #00a4dc;