feat: v1.2.0 — Apps tab, light/dark theme, visual overhaul, animations

- Apps tab: new AppEntry type (source: 'app'), apps.json storage, IPC handlers
  (apps:add/remove/update), square tile layout in grid, blue APP badge
- Light/dark theme: CSS variables in :root/.light, ThemeToggle (Sun/Moon),
  persisted in localStorage, smooth 0.2s transition
- Visual overhaul: gradient logo, pill badges, glassmorphism header,
  gradient play button, modern AdminPanel as slide-in drawer from right
- Animations: 3D tilt + glow on hover, bounce on favorite star, ripple on play,
  slide indicator in CategoryFilter, per-category grid re-animation
- AdminPanel: ESC to close, slide-in/out animation, Game/App toggle in add form,
  separate sections for games and apps

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "club-launcher",
-  "version": "1.1.0",
+  "version": "1.2.0",
   "description": "Game launcher for computer club",
   "author": "houseassassin",
   "main": "out/main/main.js",