diff --git a/frontend/src/lib/admin/admin-error-response.ts b/frontend/src/lib/admin/admin-error-response.ts
index d73a7d3c..234e3c5a 100644
--- a/frontend/src/lib/admin/admin-error-response.ts
+++ b/frontend/src/lib/admin/admin-error-response.ts
@@ -7,10 +7,30 @@ function isPostgresError(error: unknown): error is { code: string } {
     && typeof (error as { code?: unknown }).code === "string";
 }
 
+function errorMessage(error: unknown) {
+  return typeof error === "object" && error !== null && "message" in error
+    && typeof (error as { message?: unknown }).message === "string"
+    ? (error as { message: string }).message
+    : "";
+}
+
 export function adminErrorResponse(error: unknown) {
   if (error instanceof AdminAuthorizationError) {
     return NextResponse.json({ error: error.message }, { status: error.status });
   }
+  const message = errorMessage(error);
+  if (message.includes("模型供应商地址不在服务器允许列表中")) {
+    return NextResponse.json({ error: message }, { status: 400 });
+  }
+  if (message.includes("网关地址不允许")) {
+    return NextResponse.json({ error: message }, { status: 400 });
+  }
+  if (message.includes("model_provider_url_unsafe")) {
+    return NextResponse.json({ error: "模型供应商地址不安全或解析到内网" }, { status: 400 });
+  }
+  if (message.includes("模型供应商密钥未配置") || message.includes("model_provider_key_required")) {
+    return NextResponse.json({ error: "模型供应商密钥未配置" }, { status: 409 });
+  }
   if (isPostgresError(error)) {
     if (error.code === "42501") return NextResponse.json({ error: "无权执行此操作" }, { status: 403 });
     if (error.code === "40001") return NextResponse.json({ error: "资源已被其他管理员修改，请刷新后重试" }, { status: 409 });
diff --git a/frontend/tests/admin-auth.test.ts b/frontend/tests/admin-auth.test.ts
index 76ea6df6..6ce241d2 100644
--- a/frontend/tests/admin-auth.test.ts
+++ b/frontend/tests/admin-auth.test.ts
@@ -168,6 +168,25 @@ test("configuration, identity reader, and RBAC query failures become sanitized 5
   }
 });
 
+test("adminErrorResponse maps model provider configuration failures without exposing details", async () => {
+  for (const [error, status, message] of [
+    [new Error("模型供应商地址不在服务器允许列表中"), 400, "模型供应商地址不在服务器允许列表中"],
+    [new Error("网关地址不允许解析到本机、内网或保留地址"), 400, "网关地址不允许解析到本机、内网或保留地址"],
+    [new Error("model_provider_url_unsafe"), 400, "模型供应商地址不安全或解析到内网"],
+    [new Error("model_provider_key_required"), 409, "模型供应商密钥未配置"],
+  ] as const) {
+    const response = adminErrorResponse(error);
+    assert.equal(response.status, status);
+    assert.deepEqual(await response.json(), { error: message });
+  }
+
+  for (const error of [new Error("model_provider_runtime_immutable"), new Error("model_provider_code_immutable")]) {
+    const response = adminErrorResponse(error);
+    assert.equal(response.status, 500);
+    assert.deepEqual(await response.json(), { error: "后台服务暂时不可用" });
+  }
+});
+
 test("adminErrorResponse preserves the sanitized authorization 503", async () => {
   const response = adminErrorResponse(
     new AdminAuthorizationError("后台服务暂时不可用", 503),