fix: 优化AI生成失败提示与素材失效处理

core/backend/apps/ai/model_routing.py

@@ -11,6 +11,7 @@ from dataclasses import dataclass, field
 from datetime import datetime
 from typing import Any
 
+from apps.ai.generation_errors import provider_error_rule_errors
 from apps.ai.models import ModelConfig, ModelProvider
 from apps.ai.routing_policy import load_model_routing_policy
 
@@ -114,15 +115,15 @@ def provider_fallback_priority(provider: ModelProvider) -> int:
 
 
 def provider_metadata_errors(metadata: Any) -> tuple[str, ...]:
-    """校验供应商路由配置；供后台写入校验和运行前诊断共同复用。"""
+    """校验供应商路由与错误展示配置；供后台写入校验和运行前诊断共同复用。"""
 
     routing = _dict(_dict(metadata).get("routing"))
-    if "fallback_priority" not in routing:
-        return ()
-    value = routing["fallback_priority"]
-    if isinstance(value, bool) or not isinstance(value, int) or not 0 <= value <= 1000:
-        return ("routing.fallback_priority 必须是 0 到 1000 的整数，数字越小越优先",)
-    return ()
+    errors = list(provider_error_rule_errors(metadata))
+    if "fallback_priority" in routing:
+        value = routing["fallback_priority"]
+        if isinstance(value, bool) or not isinstance(value, int) or not 0 <= value <= 1000:
+            errors.append("routing.fallback_priority 必须是 0 到 1000 的整数，数字越小越优先")
+    return tuple(errors)
 
 
 def model_metadata_errors(capability: str, metadata: Any) -> tuple[str, ...]: