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/api/tests/test_projects.py

@@ -16,6 +16,7 @@ from ww_core.domain.repositories import (
     ForeshadowView,
     MemoryRepos,
     OutlineView,
+    ProjectSpecView,
     RuleView,
     StyleView,
     WorldEntityView,
@@ -27,6 +28,9 @@ class _EmptyOutlineRepo:
     async def get(self, project_id: uuid.UUID, chapter_no: int) -> OutlineView | None:
         return None
 
+    async def list_for_project(self, project_id: uuid.UUID) -> list[OutlineView]:
+        return []
+
 
 class _EmptyCharacterRepo:
     async def list_for_project(self, project_id: uuid.UUID) -> list[CharacterView]:
@@ -58,6 +62,11 @@ class _EmptyRulesRepo:
         return []
 
 
+class _StubProjectSpecRepo:
+    async def spec(self, project_id: uuid.UUID) -> ProjectSpecView | None:
+        return ProjectSpecView(title="测试作品", premise="测试前提")
+
+
 def _empty_memory_repos() -> MemoryRepos:
     return MemoryRepos(
         outline=_EmptyOutlineRepo(),
@@ -67,6 +76,7 @@ def _empty_memory_repos() -> MemoryRepos:
         foreshadow=_EmptyForeshadowRepo(),
         style=_EmptyStyleRepo(),
         rules=_EmptyRulesRepo(),
+        project=_StubProjectSpecRepo(),
     )
 
 
@@ -208,3 +218,30 @@ async def test_put_draft_is_idempotent() -> None:
     assert saved.content == "改稿更长"
     assert saved.version == 1
     assert r2.json()["length"] == len("改稿更长")
+
+
+@pytest.mark.asyncio
+async def test_get_draft_returns_saved_content() -> None:
+    chapter_repo = FakeChapterRepo()
+    client, _, _, _ = _make_client(chapter_repo=chapter_repo)
+    pid = uuid.uuid4()
+    async with client:
+        await client.put(f"/projects/{pid}/chapters/5/draft", json={"text": "阿福重访工作台"})
+        resp = await client.get(f"/projects/{pid}/chapters/5/draft")
+    assert resp.status_code == 200
+    body = resp.json()
+    assert body["content"] == "阿福重访工作台"
+    assert body["status"] == "draft"
+    assert body["version"] == 1
+    assert body["chapter_no"] == 5
+    assert body["length"] == len("阿福重访工作台")
+
+
+@pytest.mark.asyncio
+async def test_get_draft_404_when_no_draft() -> None:
+    client, _, _, _ = _make_client()
+    pid = uuid.uuid4()
+    async with client:
+        resp = await client.get(f"/projects/{pid}/chapters/9/draft")
+    assert resp.status_code == 404
+    assert resp.json()["error"]["code"] == ErrorCode.NOT_FOUND