feat(styles): add active indicator classes for dropdown buttons

- Add bg-theme-active/inactive for theme buttons
- Add bg-wood-active/inactive for wood paneling buttons
- Use CSS variables already defined in input.css
- Use !important to override inline styles

web/static/input.css

@@ -195,4 +195,15 @@
     background-color: transparent !important;
     color: #c0caf5 !important;
   }
+
+  /* Active/inactive states for theme and wood paneling buttons */
+  .bg-theme-active,
+  .bg-wood-active {
+    background-color: var(--bg-primary) !important;
+  }
+
+  .bg-theme-inactive,
+  .bg-wood-inactive {
+    background-color: var(--bg-secondary) !important;
+  }
 }