[Integration] Convert Vuetify to use @vuetify/0 useLocale

[johnleider]

Summary

Convert Vuetify 3 to use @vuetify/v0 useLocale.

Research Findings

Current Status

v0's useLocale is largely compatible with Vuetify 3. Both provide similar functionality:

• Locale switching
• Message retrieval with interpolation
• RTL detection
• Reactive locale state

v0 Advantages

Feature	v0	Vuetify 3
Adapter pattern	✅ Pluggable	❌ Built-in only
Trinity pattern	✅ Full support	❌ Basic injection
Auto-sync with useDate	✅ Built-in	❌ Manual

Integration Path

1. Direct Replacement: v0's API is similar enough for direct adoption
2. Adapter Bridge: Create adapter that wraps Vuetify 3's locale format if needed
3. Component Updates: Update useLocale() imports across components

API Mapping

Vuetify 3	v0 Equivalent
useLocale().current	useLocale().locale
useLocale().t()	useLocale().t()
useLocale().isRtl	useLocale().isRtl

Dependencies

• [Audit] useLocale - ensure parity with Vuetify createLocale #105 - Audit useLocale parity

[johnleider]

vuetifyjs/vuetify#22753