feat: frontend perf and a11y pass, plus mod visuals, hero main menu, Simple Voice Chat and vanilla chat autocomplete

Frontend:
- replace the i18next stack with a small typed i18n module
- hero clouds removed, llms.txt, HUD widget ARIA fixes and tests

Mod:
- TargetESP constellation mode; tracker and colors extracted
- JumpCircles: 7 new shapes, shared animation and color pipeline
- KillEffect blood mode with Burst/Fountain/Ring/Spray styles
- main menu: menuLayout setting (orbs/hero) and hero screen
- Simple Voice Chat soft integration: VoiceChat module and HUD panel
- renderer/quick: static Draw facade with glass outline
- vanilla chat: Baritone-style autocomplete popup for the % command prefix

frontend/package.json

@@ -18,11 +18,8 @@
     "@fontsource-variable/unbounded": "^5.3.0",
     "@tailwindcss/vite": "^4.3.3",
     "@tanstack/react-query": "^5.103.2",
-    "i18next": "^26.4.2",
-    "i18next-browser-languagedetector": "^8.2.1",
     "react": "^19.2.8",
     "react-dom": "^19.2.8",
-    "react-i18next": "^17.0.15",
     "react-router": "^8.4.0",
     "tailwindcss": "^4.3.3"
   },