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/src/features/themes/editor/ThemeEditor.tsx

@@ -1,5 +1,5 @@
 import { type ReactNode, startTransition, useEffect, useMemo } from 'react'
-import { useTranslation } from 'react-i18next'
+import { useTranslation } from '@shared/i18n/react'
 import { themeToCssVars } from '@features/clickgui/themeVars'
 import { PRESETS } from '../presets.generated'
 import type { ThemeEntry } from '../types'

frontend/src/features/themes/editor/fields/ColorField.tsx

@@ -1,5 +1,5 @@
 import { type CSSProperties, memo, useId, useState } from 'react'
-import { useTranslation } from 'react-i18next'
+import { useTranslation } from '@shared/i18n/react'
 import { argbToCss, parseArgb } from '../../types'
 import './fields.css'
 

frontend/src/features/themes/editor/fields/GradientField.tsx

@@ -1,5 +1,5 @@
 import { memo } from 'react'
-import { useTranslation } from 'react-i18next'
+import { useTranslation } from '@shared/i18n/react'
 import { cssAngle } from '@features/clickgui/themeVars'
 import { argbToCss, type GradientSpec } from '../../types'
 import { ColorField } from './ColorField'

frontend/src/features/themes/editor/panel/ExportActions.tsx

@@ -1,5 +1,5 @@
 import { useEffect, useRef, useState } from 'react'
-import { useTranslation } from 'react-i18next'
+import { useTranslation } from '@shared/i18n/react'
 import { parseArgb, type ThemeEntry } from '../../types'
 import { fromProfileJson, toProfileJson, toShareHash } from '../model/codec'
 

frontend/src/features/themes/editor/panel/PaletteTabs.tsx

@@ -1,5 +1,5 @@
 import { type KeyboardEvent, useCallback, useId, useLayoutEffect, useMemo, useRef, useState } from 'react'
-import { useTranslation } from 'react-i18next'
+import { useTranslation } from '@shared/i18n/react'
 import type { GradientSpec, ThemeColors, ThemeEntry } from '../../types'
 import { ColorField } from '../fields/ColorField'
 import { GradientField } from '../fields/GradientField'

frontend/src/features/themes/editor/panel/PanelHeader.tsx

@@ -1,4 +1,4 @@
-import { useTranslation } from 'react-i18next'
+import { useTranslation } from '@shared/i18n/react'
 import type { ThemeEntry } from '../../types'
 
 type History = { undo: () => void; redo: () => void; reset: () => void; resetName: string; canUndo: boolean; canRedo: boolean }

frontend/src/features/themes/editor/panel/PresetPicker.tsx

@@ -1,5 +1,5 @@
 import type { CSSProperties } from 'react'
-import { useTranslation } from 'react-i18next'
+import { useTranslation } from '@shared/i18n/react'
 import { themeToCssVars } from '@features/clickgui/themeVars'
 import { PRESETS } from '../../presets.generated'