refactor: remove friend feature, local whisper, doubao & anthropic STT; consolidate voice to Groq

fix: prevent TTS replay of historical messages on session resume

feat: Filter TTS rules based on language

fix: tts not read tool message

feat: /voice use best grop whisper provider free and fast

fix: desktop provider kepp TUI

feat: voice TW girl voice

feat: voice support zh-CN

feat: voice ok

feat: voice stt+tts just first have voice

feat: voice add fully-local STT (faster-whisper) + TTS (edge-tts)