feat: redesign admin panel with glass morphism UI, animated background, and stats bar

- Rewrite AdminPanel with cosmic floating orbs background using theme colors
- Add stats bar: uptime, bot version, cabinet version, trial/paid counts from API
- Glass morphism cards with 3D tilt effect (rAF-throttled) and entry animations
- Live search with Cmd+K shortcut, highlight matches, permission-aware filtering
- Register Tailwind `light:` variant for proper light theme support
- Mobile optimizations: reduced orbs (3), lower blur (80px), compact 2-col stats
- Telegram MiniApp safe area support via useTelegramSDK
- Full accessibility: aria-hidden on decorative SVGs, aria-labels, role="status"
- React.memo on StatsBar, GlassCard, CosmosBackground for render performance
- Memo-stable section refs via Set<id> pattern to preserve GlassCard memo during search
- i18n keys added to all 4 locales (ru, en, zh, fa)

src/locales/en.json

@@ -1117,6 +1117,17 @@
     "panel": {
       "title": "Admin Panel",
       "subtitle": "System management",
+      "statsUptime": "Uptime",
+      "statsBot": "Bot",
+      "statsCabinet": "Cabinet",
+      "statsTrials": "Trials",
+      "statsPaid": "Paid",
+      "statsOnline": "Online",
+      "statsToday": "today",
+      "searchPlaceholder": "Search...",
+      "searchEmpty": "Nothing found",
+      "searchEmptyHint": "Try a different query",
+      "searchClear": "Clear search",
       "dashboardDesc": "Statistics and system monitoring",
       "ticketsDesc": "Handle user support tickets",
       "settingsDesc": "System settings and parameters",