fix(web): 大纲错误透传 FriendlyError, 不再向用户暴露内部 code

apps/web/components/outline/OutlineEditor.tsx

@@ -8,6 +8,7 @@ import { Button } from "@/components/ui/Button";
 import { EmptyState } from "@/components/ui/EmptyState";
 import { PageHeader } from "@/components/ui/PageHeader";
 import { Select } from "@/components/ui/Select";
+import { StatusNote } from "@/components/ui/StatusNote";
 import { TextInput } from "@/components/ui/TextInput";
 import type { OutlineChapterView, ProjectResponse } from "@/lib/api/types";
 import {
@@ -111,20 +112,20 @@ export function OutlineEditor({
         />
 
         {error ? (
-          <p className="mb-4 text-sm text-conflict">
-            大纲生成失败（{error.code}）：{error.message}
-            {error.code === "LLM_UNAVAILABLE" ? (
+          <StatusNote variant="danger" title="大纲生成失败" className="mb-4">
+            {error.text}
+            {error.actionHref ? (
               <>
                 {" "}
                 <a
-                  href="/settings/providers"
+                  href={error.actionHref}
                   className="underline hover:text-cinnabar"
                 >
-                  去设置提供商
+                  {error.actionLabel}
                 </a>
               </>
             ) : null}
-          </p>
+          </StatusNote>
         ) : null}
 
         <div className="min-h-0 flex-1 overflow-auto">