Filter unsupported listed chat models

backend/api/server.py

@@ -65,6 +65,11 @@ VALIDATED_CHAT_MODEL_PROVIDERS = {
     'zhipuai',
 }
 
+UNSUPPORTED_CHAT_MODEL_PREFIXES: tuple[tuple[str, str], ...] = (
+    # /models 会返回这批 ppio 模型，但 /chat/completions 实测不支持。
+    ('ppio', 'pa/claude-'),
+)
+
 # WebUI 的快速入口只展示可以通过对话输入框安全执行的 slash command。
 # 这些命令仍然保留在终端 `/` 列表里，但不适合作为 WebUI 快捷项。
 WEBUI_HIDDEN_SLASH_COMMANDS = {
@@ -1547,6 +1552,8 @@ def _normalize_model_list(payload: Any) -> list[dict[str, str]]:
         )
         if provider and provider not in VALIDATED_CHAT_MODEL_PROVIDERS:
             continue
+        if _is_known_unsupported_chat_model(provider, model_id):
+            continue
         normalized = _normalize_model_id(model_id, provider=provider)
         if normalized is not None:
             entry = {'id': normalized}
@@ -1579,6 +1586,15 @@ def _normalize_model_id(model: str, *, provider: str | None = None) -> str | Non
     return value
 
 
+def _is_known_unsupported_chat_model(provider: str | None, model_id: str) -> bool:
+    provider_key = (provider or '').strip().lower()
+    model_key = model_id.strip().lower()
+    return any(
+        provider_key == blocked_provider and model_key.startswith(blocked_prefix)
+        for blocked_provider, blocked_prefix in UNSUPPORTED_CHAT_MODEL_PREFIXES
+    )
+
+
 def _is_llm_model(model_id: str, model_type: str | None) -> bool:
     lower = model_id.strip().lower()
     blocked_fragments = (