feat(toolbox): T6 创作工具箱通用生成器框架 — 8 新生成器 + 声明驱动落地页 + P2 收尾

通用执行路径驱动全部生成器（"加生成器=加一份声明"）：
- @llm: ww_agents +7 输出 schema + 7 spec（book-title/blurb/name/golden-finger/
  glossary/opening/fine-outline，只声明 tier）+ build_outline_chapter_context
- @backend: ww_skills GeneratorTool 描述符 + TOOLBOX(11) + get_tool；3 通用端点
  GET /skills/toolbox · POST .../skills/{tool_key}/generate(预览不写库,仅记账) ·
  POST .../ingest(复用 continuity 409 + partition_writes 白名单)；纯 context 派发
- @frontend: 工具箱落地页 RSC + 声明驱动 GeneratorRunner + lib/toolbox 纯函数
  + LeftNav「工具箱」+ ⌘K nav-toolbox/action-gen-*；legacy 3 跳现页
- @qa: tests/test_t6_toolbox_e2e.py 5 用例真 pg + mock 网关零 token，无端点 bug
- P2 收尾: 限流→decisions.md 记延后(单用户原型)；noopener/Committable 早已修

守不变量 #2(只声明 tier)/#3(预览不写库,入库经验收 gate)/#9(缓存前缀)。无 DB 迁移。
门禁绿: 后端 ruff/format/mypy 195/alembic 无漂移/pytest 583；前端 lint/tsc/vitest 279/build。
spec 回写 PRODUCT_SPEC §7 + ARCHITECTURE §7.2 端点表。

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

apps/web/components/command/CommandPalette.tsx

@@ -9,8 +9,10 @@ import {
   moveHighlight,
   projectCommands,
   type Command,
+  type ToolCommandInfo,
 } from "@/lib/command/palette";
 import { handleTabTrap } from "@/lib/a11y/focusTrap";
+import { api } from "@/lib/api/client";
 
 // 从 pathname 抽取当前 projectId（/projects/<id>/...）。
 function projectIdFromPath(pathname: string): string | null {
@@ -31,14 +33,17 @@ export function CommandPalette({ pathname }: CommandPaletteProps) {
   const [highlight, setHighlight] = useState(0);
   const inputRef = useRef<HTMLInputElement>(null);
   const dialogRef = useRef<HTMLDivElement>(null);
+  // 工具箱生成器（命令面板发现性）：首次打开惰性拉取一次，失败静默降级为空。
+  const [tools, setTools] = useState<ToolCommandInfo[]>([]);
+  const toolsLoadedRef = useRef(false);
 
   const projectId = projectIdFromPath(pathname);
   const commands = useMemo<Command[]>(
     () =>
       projectId
-        ? [...projectCommands(projectId), ...globalCommands()]
+        ? [...projectCommands(projectId, tools), ...globalCommands()]
         : globalCommands(),
-    [projectId],
+    [projectId, tools],
   );
   const results = useMemo(
     () => filterCommands(commands, query),
@@ -76,6 +81,29 @@ export function CommandPalette({ pathname }: CommandPaletteProps) {
   useEffect(() => {
     if (open) inputRef.current?.focus();
   }, [open]);
+
+  // 首次打开（项目内）惰性拉工具箱生成器列表，供生成 action-gen-<key> 命令。
+  useEffect(() => {
+    if (!open || !projectId || toolsLoadedRef.current) return;
+    toolsLoadedRef.current = true;
+    let cancelled = false;
+    void (async () => {
+      try {
+        const { data } = await api.GET("/skills/toolbox");
+        if (cancelled || !data?.tools) return;
+        setTools(
+          data.tools
+            .filter((t) => !t.is_legacy)
+            .map((t) => ({ key: t.key, title: t.title, genre: t.genre })),
+        );
+      } catch {
+        // 静默降级：命令面板照常工作，仅缺生成器动作。
+      }
+    })();
+    return () => {
+      cancelled = true;
+    };
+  }, [open, projectId]);
   useEffect(() => {
     setHighlight(0);
   }, [query]);