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/jobs/job.ts

@@ -0,0 +1,111 @@
+// 长任务（jobs）轮询纯逻辑：把松散 `GET /jobs/{id}` 响应安全收窄成 JobView，
+// 并提供一个 setTimeout 轮询状态机的纯 reducer（C3.5 / ARCH §7.4）。
+// schema 把 GET /jobs/{id} 标成 {[k]:unknown}（T0.3 裸端点），这里安全narrow。
+
+// 后端 job 状态机（C3.5）：queued → running → done|failed。
+export type JobStatus = "queued" | "running" | "done" | "failed";
+
+export interface JobView {
+  id: string;
+  kind: string;
+  status: JobStatus;
+  progress: number;
+  result: Record<string, unknown> | null;
+  error: string | null;
+}
+
+function asString(v: unknown, fallback = ""): string {
+  return typeof v === "string" ? v : fallback;
+}
+
+function asStatus(v: unknown): JobStatus {
+  return v === "running" || v === "done" || v === "failed" || v === "queued"
+    ? v
+    : "queued";
+}
+
+function asProgress(v: unknown): number {
+  if (typeof v !== "number" || !Number.isFinite(v)) return 0;
+  return Math.min(100, Math.max(0, Math.round(v)));
+}
+
+function asResult(v: unknown): Record<string, unknown> | null {
+  return typeof v === "object" && v !== null && !Array.isArray(v)
+    ? (v as Record<string, unknown>)
+    : null;
+}
+
+// 把松散 GET /jobs/{id} 响应收窄成 JobView（缺字段给安全默认）。
+export function narrowJob(raw: unknown): JobView {
+  const dict =
+    typeof raw === "object" && raw !== null ? (raw as Record<string, unknown>) : {};
+  return {
+    id: asString(dict["id"]),
+    kind: asString(dict["kind"]),
+    status: asStatus(dict["status"]),
+    progress: asProgress(dict["progress"]),
+    result: asResult(dict["result"]),
+    error: typeof dict["error"] === "string" ? (dict["error"] as string) : null,
+  };
+}
+
+// 学文风 job 完成态的 result：{version, dims_count}（C3 扩 work 摘要）。
+export interface StyleLearnResult {
+  version: number | null;
+  dimsCount: number | null;
+}
+
+export function styleLearnResult(job: JobView): StyleLearnResult {
+  const r = job.result ?? {};
+  const version = typeof r["version"] === "number" ? r["version"] : null;
+  const dimsCount =
+    typeof r["dims_count"] === "number" ? r["dims_count"] : null;
+  return { version, dimsCount };
+}
+
+// 轮询状态机：polling（queued/running）→ done | error（done/failed）。
+export type PollStatus = "polling" | "done" | "error";
+
+export interface PollState {
+  status: PollStatus;
+  progress: number;
+  job: JobView | null;
+  error: string | null;
+}
+
+export const initialPollState: PollState = {
+  status: "polling",
+  progress: 0,
+  job: null,
+  error: null,
+};
+
+export type PollAction =
+  | { type: "tick"; job: JobView }
+  | { type: "fail"; error: string };
+
+// 纯 reducer：吃一次轮询结果，映射成轮询状态。
+// done → 终态 done；failed → 终态 error（用 job.error 文案）；其余 → 继续 polling。
+export function reducePoll(state: PollState, action: PollAction): PollState {
+  if (action.type === "fail") {
+    return { ...state, status: "error", error: action.error };
+  }
+  const { job } = action;
+  if (job.status === "done") {
+    return { status: "done", progress: 100, job, error: null };
+  }
+  if (job.status === "failed") {
+    return {
+      status: "error",
+      progress: job.progress,
+      job,
+      error: job.error ?? "任务失败",
+    };
+  }
+  return { status: "polling", progress: job.progress, job, error: null };
+}
+
+// 是否终态（停止轮询）。
+export function isTerminal(status: JobStatus): boolean {
+  return status === "done" || status === "failed";
+}