Add DashScope ASR model support and enhance related components

- Introduced DashScope as a new ASR model in the database initialization.
- Updated ASRModel schema to include vendor information.
- Enhanced ASR router to support DashScope-specific functionality, including connection testing and preview capabilities.
- Modified frontend components to accommodate DashScope as a selectable vendor with appropriate default settings.
- Added tests to validate DashScope ASR model creation, updates, and connectivity.
- Updated backend API to handle DashScope-specific base URLs and vendor normalization.

api/init_db.py

@@ -34,6 +34,7 @@ SEED_LLM_IDS = {
 SEED_ASR_IDS = {
     "sensevoice_small": short_id("asr"),
     "telespeech_asr": short_id("asr"),
+    "dashscope_realtime": short_id("asr"),
 }
 
 SEED_ASSISTANT_IDS = {
@@ -408,6 +409,20 @@ def init_default_asr_models():
                 enable_normalization=True,
                 enabled=True,
             ),
+            ASRModel(
+                id=SEED_ASR_IDS["dashscope_realtime"],
+                user_id=1,
+                name="DashScope Realtime ASR",
+                vendor="DashScope",
+                language="Multi-lingual",
+                base_url=DASHSCOPE_REALTIME_URL,
+                api_key="YOUR_API_KEY",
+                model_name="qwen3-asr-flash-realtime",
+                hotwords=[],
+                enable_punctuation=True,
+                enable_normalization=True,
+                enabled=True,
+            ),
         ]
         seed_if_empty(db, ASRModel, asr_models, "✅ 默认ASR模型已初始化")