feat(web): F1/F2/F3 前端——拆书入库为规则 / 续写式链选择 / 模板库

- gen:api 纳入 /templates、chain continue_volume、teardown rules ingest 端点
- F1：GeneratorRunner 识别拆书为单对象入库（整 preview 作一条 teardown），
  ingestTable(BookTeardownResult)=rules，buildIngestRequest 组装 teardown 体，
  按 isSingleObjectIngest 隐藏勾选框、改文案「入库为规则」
- F2：ChainStarter 加链类型单选（draft_volume 从头写 / continue_volume 续写），
  chain_key 作 path 参传给 run（CHAIN_KINDS 对齐后端 SUPPORTED_CHAINS）
- F3：模板库页 app/templates + 全局 nav 入口 + TemplatesManager（列/建/删，乐观更新回滚）；
  GeneratorRunner 加 TemplateFiller「从模板填入」（body 填进 brief/text，纯前端）
- vitest 覆盖 templates/ingest teardown/templateFillTarget/CHAIN_KINDS 纯逻辑

apps/web/components/toolbox/GeneratorRunner.tsx

@@ -10,11 +10,13 @@ import {
   initialFieldValues,
   missingRequiredFields,
   previewRows,
+  templateFillTarget,
   type FieldValues,
   type PreviewItem,
 } from "@/lib/toolbox/toolbox";
-import { ingestTable } from "@/lib/toolbox/ingest";
+import { ingestTable, isSingleObjectIngest } from "@/lib/toolbox/ingest";
 import { useGenerator } from "@/lib/toolbox/useGenerator";
+import { TemplateFiller } from "./TemplateFiller";
 
 interface GeneratorRunnerProps {
   projectId: string;
@@ -42,6 +44,12 @@ export function GeneratorRunner({
     setValues((prev) => ({ ...prev, [name]: value }));
   }, []);
 
+  // 「从模板填入」的目标字段（brief / text；无则不渲染）。
+  const fillTarget = useMemo(
+    () => templateFillTarget(tool.input_fields),
+    [tool.input_fields],
+  );
+
   const onGenerate = useCallback(async (): Promise<void> => {
     const missing = missingRequiredFields(tool.input_fields, values);
     if (missing.length > 0) {
@@ -58,7 +66,15 @@ export function GeneratorRunner({
   );
 
   const table = gen.outputKind ? ingestTable(gen.outputKind) : null;
-  const canIngest = tool.ingestable && table !== null && rows.length > 0;
+  // 单对象产物（如拆书）：整个 preview 即一条入库项，无逐行勾选；行式产物按勾选入库。
+  const singleObject = gen.outputKind
+    ? isSingleObjectIngest(gen.outputKind)
+    : false;
+  const hasPreview = (gen.preview?.items.length ?? 0) > 0;
+  const canIngest =
+    tool.ingestable &&
+    table !== null &&
+    (singleObject ? hasPreview : rows.length > 0);
 
   const toggle = useCallback((idx: number): void => {
     setSelected((prev) => {
@@ -81,14 +97,17 @@ export function GeneratorRunner({
     async (acknowledge: boolean): Promise<void> => {
       if (!gen.outputKind) return;
       const chapterNo = Number(values["chapter_no"]?.trim() || "") || null;
+      // 单对象产物（拆书）：整个 rawPreview 作唯一入库行；行式产物用勾选行。
+      const ingestRows =
+        singleObject && gen.rawPreview ? [gen.rawPreview] : selectedRows;
       await gen.ingest(projectId, tool.key, {
         outputKind: gen.outputKind,
-        rows: selectedRows,
+        rows: ingestRows,
         chapterNo,
         acknowledgeConflicts: acknowledge,
       });
     },
-    [gen, projectId, tool.key, selectedRows, values],
+    [gen, projectId, tool.key, selectedRows, values, singleObject],
   );
 
   const generating = gen.genStatus === "generating";
@@ -120,6 +139,7 @@ export function GeneratorRunner({
           void onGenerate();
         }}
       >
+        <TemplateFiller targetField={fillTarget} onFill={setField} />
         {(tool.input_fields ?? []).map((field) => (
           <FormField
             key={field.name}
@@ -141,7 +161,11 @@ export function GeneratorRunner({
         <div className="flex flex-col gap-3">
           <h3 className="font-serif text-sm text-ink">
             预览（{gen.preview.items.length}）
-            {canIngest ? "（勾选后可入库）" : null}
+            {canIngest
+              ? singleObject
+                ? "（可入库）"
+                : "（勾选后可入库）"
+              : null}
           </h3>
           <ul className="flex flex-col gap-2">
             {gen.preview.items.map((item, i) => (
@@ -149,7 +173,7 @@ export function GeneratorRunner({
                 key={i}
                 item={item}
                 index={i}
-                selectable={canIngest}
+                selectable={canIngest && !singleObject}
                 checked={selected.has(i)}
                 onToggle={toggle}
               />
@@ -160,10 +184,14 @@ export function GeneratorRunner({
             <button
               type="button"
               onClick={() => void runIngest(false)}
-              disabled={ingesting || selected.size === 0}
+              disabled={ingesting || (!singleObject && selected.size === 0)}
               className="self-start rounded border border-cinnabar px-4 py-2 text-sm text-cinnabar disabled:opacity-50"
             >
-              {ingesting ? "入库中…" : `入库选中（${selected.size}）至 ${table}`}
+              {ingesting
+                ? "入库中…"
+                : singleObject
+                  ? `入库为规则至 ${table}`
+                  : `入库选中（${selected.size}）至 ${table}`}
             </button>
           ) : null}