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/skills/skills.test.ts

@@ -0,0 +1,38 @@
+import { describe, expect, it } from "vitest";
+
+import type { SkillView } from "@/lib/api/types";
+import { groupByScope, scopeLabel, tierLabel } from "./skills";
+
+const skill = (over: Partial<SkillView>): SkillView => ({
+  name: "x",
+  scope: "builtin",
+  tier: "analyst",
+  ...over,
+});
+
+describe("scopeLabel / tierLabel", () => {
+  it("maps known values, passes through unknown", () => {
+    expect(scopeLabel("builtin")).toBe("内置");
+    expect(scopeLabel("mystery")).toBe("mystery");
+    expect(tierLabel("writer")).toBe("写手");
+    expect(tierLabel("xl")).toBe("xl");
+  });
+});
+
+describe("groupByScope", () => {
+  it("groups by scope in first-seen order, preserves within-group order", () => {
+    const skills: SkillView[] = [
+      skill({ name: "a", scope: "builtin" }),
+      skill({ name: "b", scope: "custom" }),
+      skill({ name: "c", scope: "builtin" }),
+    ];
+    const groups = groupByScope(skills);
+    expect(groups.map((g) => g.scope)).toEqual(["builtin", "custom"]);
+    expect(groups[0].skills.map((s) => s.name)).toEqual(["a", "c"]);
+    expect(groups[1].skills.map((s) => s.name)).toEqual(["b"]);
+  });
+
+  it("handles undefined", () => {
+    expect(groupByScope(undefined)).toEqual([]);
+  });
+});

apps/web/lib/skills/skills.ts

@@ -0,0 +1,44 @@
+// 技能库纯逻辑：按 scope 分组、档位文案。
+// 对齐 C3 扩（GET /skills，只读注册表视图）。纯逻辑，便于 node 环境单测。
+
+import type { SkillView } from "@/lib/api/types";
+
+export type SkillScope = "builtin" | "custom" | "community";
+
+export const SCOPE_LABELS: Record<string, string> = {
+  builtin: "内置",
+  custom: "自定义",
+  community: "社区",
+};
+
+export const TIER_LABELS: Record<string, string> = {
+  writer: "写手",
+  analyst: "分析",
+  light: "轻量",
+};
+
+export function scopeLabel(scope: string): string {
+  return SCOPE_LABELS[scope] ?? scope;
+}
+
+export function tierLabel(tier: string): string {
+  return TIER_LABELS[tier] ?? tier;
+}
+
+export type SkillGroups = { scope: string; skills: SkillView[] }[];
+
+// 按 scope 分组（保持服务端 name 升序）；scope 顺序按首次出现。
+export function groupByScope(
+  skills: readonly SkillView[] | undefined,
+): SkillGroups {
+  const order: string[] = [];
+  const map = new Map<string, SkillView[]>();
+  for (const skill of skills ?? []) {
+    if (!map.has(skill.scope)) {
+      order.push(skill.scope);
+      map.set(skill.scope, []);
+    }
+    map.get(skill.scope)?.push(skill);
+  }
+  return order.map((scope) => ({ scope, skills: map.get(scope) ?? [] }));
+}