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

apps/web/lib/outline/useOutline.ts

@@ -4,20 +4,20 @@ import { useCallback, useState } from "react";
 
 import { api } from "@/lib/api/client";
 import { useToast } from "@/components/Toast";
-import { friendlyFromApiError } from "@/lib/errors/messages";
+import {
+  friendlyFromApiError,
+  type FriendlyError,
+} from "@/lib/errors/messages";
 import type { OutlineChapterView } from "@/lib/api/types";
 
 export type OutlineStatus = "idle" | "generating" | "ready" | "error";
 
-export interface OutlineError {
-  code: string;
-  message: string;
-}
-
 export interface UseOutline {
   chapters: OutlineChapterView[];
   status: OutlineStatus;
-  error: OutlineError | null;
+  // 直接透传 friendlyFromApiError 的结果（含 text + 可选 actionHref/actionLabel），
+  // 不再拍平成固定的内部 code，UI 据 actionHref 是否存在决定显示跳转链接。
+  error: FriendlyError | null;
   generate: (projectId: string, volume: number) => Promise<void>;
 }
 
@@ -28,7 +28,7 @@ export function useOutline(initial: OutlineChapterView[]): UseOutline {
   const [status, setStatus] = useState<OutlineStatus>(
     initial.length > 0 ? "ready" : "idle",
   );
-  const [error, setError] = useState<OutlineError | null>(null);
+  const [error, setError] = useState<FriendlyError | null>(null);
   const toast = useToast();
 
   const generate = useCallback<UseOutline["generate"]>(
@@ -45,8 +45,9 @@ export function useOutline(initial: OutlineChapterView[]): UseOutline {
       if (apiError || !data) {
         // surface 真实错因（如 LLM_UNAVAILABLE→去设置 provider；422→校验文案），
         // 而非永远的通用「大纲生成失败」（QA #2：原 env.error.code 漏读 422 的 detail 信封）。
+        // 直接透传 friendly（保留 actionHref/actionLabel），不再拍平成固定 OUTLINE_FAILED。
         const friendly = friendlyFromApiError(apiError);
-        setError({ code: "OUTLINE_FAILED", message: friendly.text });
+        setError(friendly);
         setStatus("error");
         toast(friendly.text, "error");
         return;