feat: M4 文风 + M5 生成/多provider/Skill + Kimi Code 订阅接入 + 本地联调修复

M4（文风）: style-auditor 双轨（提取指纹/漂移第四审）+ jobs 长任务框架(zombie reaper) + 回炉 refine + GET /style read-back。
M5（生成+扩展）: worldbuilder/character-gen（入库 continuity 409 gate + partition_writes 白名单 + schema→JSONB 形变）；
  网关多 provider 回退链/熔断/能力降级（Anthropic/Gemini 适配器）；Skill registry + 表权限沙箱 + 规则；
  前端 角色生成器/世界观/Codex/规则页/技能库/⌘K 命令面板。
K1（Kimi Code 订阅接入）: OAuth device-flow（kimi-code）+ 静态 Console key（kimi-code-key）两路径；
  coding 端点 KimiCLI 伪造头（实测 UA allow-list 门禁，缺则 403）+ JSON 模式结构化（thinking ⊥ tool_choice）。
本地联调修复: CORS 中间件；assemble 注入 premise+「写第N章」指令（修空 prompt 400）；
  GET /outline·/draft read-back + 大纲/工作台/审稿页重载；写页 client/server 常量边界 + notFound 健壮化；
  字数 toLocaleString locale 水合；审稿页终稿从已存草稿 seed（修 accept 422）。
门禁: backend ruff/mypy(157)/alembic 无漂移/pytest 451 · frontend lint/tsc/vitest/build。

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

apps/web/lib/generation/useWorldGen.ts

@@ -0,0 +1,58 @@
+"use client";
+
+import { useCallback, useState } from "react";
+
+import { api } from "@/lib/api/client";
+import { useToast } from "@/components/Toast";
+import type { WorldEntityCardView } from "@/lib/api/types";
+import { buildWorldGenerateRequest, generationErrorMessage } from "./cards";
+
+export type WorldGenStatus = "idle" | "generating" | "done" | "error";
+
+export interface UseWorldGen {
+  status: WorldGenStatus;
+  entities: WorldEntityCardView[];
+  generate: (projectId: string, brief: string) => Promise<void>;
+  reset: () => void;
+}
+
+// 世界观设计器：POST /world/generate → 预览实体（不入库）。
+export function useWorldGen(): UseWorldGen {
+  const [status, setStatus] = useState<WorldGenStatus>("idle");
+  const [entities, setEntities] = useState<WorldEntityCardView[]>([]);
+  const toast = useToast();
+
+  const generate = useCallback<UseWorldGen["generate"]>(
+    async (projectId, brief) => {
+      setStatus("generating");
+      setEntities([]);
+      try {
+        const { data, error } = await api.POST(
+          "/projects/{project_id}/world/generate",
+          {
+            params: { path: { project_id: projectId } },
+            body: buildWorldGenerateRequest(brief),
+          },
+        );
+        if (error || !data) {
+          setStatus("error");
+          toast(generationErrorMessage(error), "error");
+          return;
+        }
+        setEntities(data.entities ?? []);
+        setStatus("done");
+      } catch {
+        setStatus("error");
+        toast("生成请求异常，请检查网络。", "error");
+      }
+    },
+    [toast],
+  );
+
+  const reset = useCallback((): void => {
+    setStatus("idle");
+    setEntities([]);
+  }, []);
+
+  return { status, entities, generate, reset };
+}