chore: remove personal voice channel remnants

api/.env.example

@@ -37,7 +37,7 @@ VIDEO_MODEL_VEO3=veo-3.1-fast
 # 音频文案改写 + Azure OpenAI 配音
 AUDIO_REWRITE_MODEL=gpt-4o
 AUDIO_PRODUCT_BRIEF="SKG 智能按摩产品，主打日常肩颈、腰背、眼部、膝盖或足部放松；广告表达要高级、干净、可信，不做医疗疗效承诺。"
-# 语音通道服务端固定为 azure_openai；旧 VOICE_PROVIDER=minimax 会被忽略。
+# 语音通道服务端固定为 Azure OpenAI。
 VOICE_PROVIDER=azure_openai
 AZURE_OPENAI_BASE_URL=https://ai.skg.com/azure
 AZURE_OPENAI_API_KEY=

api/main.py

@@ -97,8 +97,6 @@ AUDIO_PRODUCT_BRIEF = os.getenv(
     "SKG 智能按摩产品，主打日常肩颈、腰背、眼部、膝盖或足部放松；广告表达要高级、干净、可信，不做医疗疗效承诺。",
 ).strip()
 AUDIO_REWRITE_MODEL = gpt_model_env("AUDIO_REWRITE_MODEL", REWRITE_MODEL)
-# Voice is intentionally fixed to Azure OpenAI. Older envs may still contain
-# VOICE_PROVIDER=minimax, but the runtime must not fall back to MiniMax.
 VOICE_PROVIDER = "azure_openai"
 AZURE_OPENAI_BASE_URL = os.getenv("AZURE_OPENAI_BASE_URL", "https://ai.skg.com/azure").strip().rstrip("/")
 AZURE_OPENAI_API_KEY = os.getenv("AZURE_OPENAI_API_KEY", LLM_API_KEY).strip()
@@ -3084,7 +3082,6 @@ def health() -> dict:
             "voice_id": AZURE_TTS_VOICE_ID,
             "voice_pool": AZURE_TTS_VOICE_POOL,
             "voice_configured": bool(AZURE_OPENAI_API_KEY),
-            "minimax_disabled": True,
             "video": VIDEO_MODEL,
             "video_aliases": VIDEO_MODEL_ALIASES,
             "video_provider": video_provider_name(),