Add Whisper offline loading for air-gapped servers.

Pre-download via HF mirror scripts so inner-network deploys avoid Hub Network is unreachable errors.

Co-authored-by: Cursor <cursoragent@cursor.com>

config.py

@@ -76,23 +76,33 @@ SYSTEM_PROMPT = (
     "去掉所有无意义的口头禅，字数不做删减。"
 )
 
+# ---------------------------------------------------------------------------
+# 路径
+# ---------------------------------------------------------------------------
+BASE_DIR = Path(__file__).resolve().parent
+INSTALL_DIR = Path("/opt/Trading_Studio")
+
 # ---------------------------------------------------------------------------
 # Faster-Whisper 配置
 # ---------------------------------------------------------------------------
-WHISPER_MODEL_SIZE = "small"
+WHISPER_MODEL_SIZE = _env_str("WHISPER_MODEL_SIZE", "small")
 WHISPER_DEVICE = "cuda"
 WHISPER_COMPUTE_TYPE = "float16"
 WHISPER_LANGUAGE = "zh"
+WHISPER_MODEL_DIR = Path(_env_str("WHISPER_MODEL_DIR", str(BASE_DIR / "models" / "whisper")))
+
+WHISPER_HF_REPO = {
+    "tiny": "Systran/faster-whisper-tiny",
+    "base": "Systran/faster-whisper-base",
+    "small": "Systran/faster-whisper-small",
+    "medium": "Systran/faster-whisper-medium",
+    "large-v2": "Systran/faster-whisper-large-v2",
+    "large-v3": "Systran/faster-whisper-large-v3",
+}
 
 # ---------------------------------------------------------------------------
 # ChatTTS 配置
 # ---------------------------------------------------------------------------
-# 标准生产安装路径（/opt，root 部署）
-INSTALL_DIR = Path("/opt/Trading_Studio")
-
-# 项目根目录（开发/生产均自适应，以实际 app.py 所在目录为准）
-BASE_DIR = Path(__file__).resolve().parent
-
 # 固定音色 Embedding 存储路径
 SPEAKER_EMB_PATH = BASE_DIR / "speaker_emb.pt"