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

mod/config/lovisual/hud/draggable/voicechat.json

@@ -0,0 +1,18 @@
+{
+  "enabled": false,
+  "layout": {
+    "pos": [
+      16.0,
+      150.0
+    ],
+    "space": "logical"
+  },
+  "voicechat_scale": 1.0,
+  "voicechat_layout": "Split Header",
+  "voicechat_max_rows": 6.0,
+  "voicechat_hold_ms": 350.0,
+  "voicechat_show_self": true,
+  "voicechat_bg_alpha": 131.0,
+  "voicechat_bg_effect": "Auto",
+  "voicechat_blur_alpha": 255.0
+}