细纲生成按大纲规划的每卷章数出章，大纲页可编辑计划章数

- volumes 表新增 chapter_count 列（增量迁移），应用大纲时落库保存
- 细纲生成目标章数优先级：大纲计划章数 > 卷内已有章节数 > 默认 10
- outline 路由支持手动设置 chapter_count；大纲页每卷卡片新增「计划章数」输入框

server/src/db/schema.ts

@@ -55,7 +55,8 @@ export function migrate() {
     project_id INTEGER NOT NULL REFERENCES projects(id) ON DELETE CASCADE,
     title TEXT NOT NULL,
     summary TEXT NOT NULL DEFAULT '',
-    sort INTEGER NOT NULL DEFAULT 0
+    sort INTEGER NOT NULL DEFAULT 0,
+    chapter_count INTEGER
   );
 
   CREATE TABLE IF NOT EXISTS beats (
@@ -126,7 +127,8 @@ export function migrate() {
     ['beats', 'pov', "ALTER TABLE beats ADD COLUMN pov TEXT NOT NULL DEFAULT ''"],
     ['beats', 'emotional_arc', "ALTER TABLE beats ADD COLUMN emotional_arc TEXT NOT NULL DEFAULT ''"],
     ['beats', 'purpose', "ALTER TABLE beats ADD COLUMN purpose TEXT NOT NULL DEFAULT ''"],
-    ['beats', 'tension', 'ALTER TABLE beats ADD COLUMN tension INTEGER NOT NULL DEFAULT 0']
+    ['beats', 'tension', 'ALTER TABLE beats ADD COLUMN tension INTEGER NOT NULL DEFAULT 0'],
+    ['volumes', 'chapter_count', 'ALTER TABLE volumes ADD COLUMN chapter_count INTEGER']
   ]
   for (const [table, col, ddl] of addColumns) {
     const cols = db.prepare(`PRAGMA table_info(${table})`).all() as unknown as { name: string }[]

server/src/db/types.ts

@@ -47,6 +47,7 @@ export interface VolumeRow {
   title: string
   summary: string
   sort: number
+  chapter_count: number | null
 }
 
 export interface BeatRow {

server/src/routes/generate.ts

@@ -202,9 +202,9 @@ generateRouter.post('/generate/beats', (req, res) => {
     })
     .join('\n')
 
-  // 本卷目标章数：应用大纲时创建的空章节数；没有章节信息时默认 10
+  // 本卷目标章数：优先用大纲规划的每卷章数，其次本卷已有章节数，都没有时默认 10
   const existing = bundle.chapters.filter((c: ChapterRow) => c.volume_id === volume.id).length
-  const chapterCount = existing > 0 ? existing : 10
+  const chapterCount = volume.chapter_count && volume.chapter_count > 0 ? volume.chapter_count : existing > 0 ? existing : 10
   const messages = beatsMessages(
     toProjectLike(bundle.project),
     { title: volume.title, summary: volume.summary, chapter_count: chapterCount },
@@ -393,7 +393,13 @@ generateRouter.post('/generate/apply/volumes', (req, res) => {
     db.prepare('DELETE FROM beats WHERE project_id = ?').run(projectId)
     db.prepare('DELETE FROM volumes WHERE project_id = ?').run(projectId)
     items.forEach((v, i) => {
-      db.prepare('INSERT INTO volumes (project_id, title, summary, sort) VALUES (?,?,?,?)').run(projectId, v.title, v.summary, i + 1)
+      db.prepare('INSERT INTO volumes (project_id, title, summary, sort, chapter_count) VALUES (?,?,?,?,?)').run(
+        projectId,
+        v.title,
+        v.summary,
+        i + 1,
+        v.chapter_count ?? null
+      )
     })
     db.exec('COMMIT')
   } catch (e) {

server/src/routes/outline.ts

@@ -9,7 +9,8 @@ export const outlineRouter = Router()
 const volumeInput = z.object({
   title: z.string().min(1).max(100),
   summary: z.string().max(4000).default(''),
-  sort: z.number().int().default(0)
+  sort: z.number().int().default(0),
+  chapter_count: z.number().int().min(1).max(2000).nullable().optional()
 })
 
 outlineRouter.post('/projects/:projectId/volumes', (req, res) => {
@@ -17,8 +18,8 @@ outlineRouter.post('/projects/:projectId/volumes', (req, res) => {
   const parsed = volumeInput.safeParse(req.body)
   if (!parsed.success) return res.status(400).json({ error: parsed.error.issues[0].message })
   const info = db
-    .prepare('INSERT INTO volumes (project_id, title, summary, sort) VALUES (?,?,?,?)')
-    .run(projectId, parsed.data.title, parsed.data.summary, parsed.data.sort)
+    .prepare('INSERT INTO volumes (project_id, title, summary, sort, chapter_count) VALUES (?,?,?,?,?)')
+    .run(projectId, parsed.data.title, parsed.data.summary, parsed.data.sort, parsed.data.chapter_count ?? null)
   res.json(db.prepare('SELECT * FROM volumes WHERE id = ?').get(info.lastInsertRowid))
 })
 

web/src/api/types.ts

@@ -48,6 +48,7 @@ export interface Volume {
   title: string
   summary: string
   sort: number
+  chapter_count: number | null
 }
 
 export interface Beat {

web/src/components/OutlineView.tsx

@@ -48,8 +48,19 @@ export default function OutlineView({
               <AutoSaveText value={v.title} onSave={(t) => saveVolume(v.id, { title: t })} placeholder="卷名" bordered={false} style={{ fontWeight: 700, fontSize: 15 }} />
             </div>
             <AutoSaveText value={v.summary} onSave={(s) => saveVolume(v.id, { summary: s })} multiline minRows={2} placeholder="本卷大纲：核心冲突、关键事件、结尾钩子" style={{ color: '#555' }} />
-            <div style={{ marginTop: 6, color: '#bbb', fontSize: 12 }}>
-              本卷 {bundle.chapters.filter((c) => c.volume_id === v.id).length} 章（生成细纲后自动创建）
+            <div style={{ marginTop: 6, color: '#bbb', fontSize: 12, display: 'flex', alignItems: 'center', gap: 4, flexWrap: 'wrap' }}>
+              <span>本卷已有 {bundle.chapters.filter((c) => c.volume_id === v.id).length} 章 · 计划章数</span>
+              <AutoSaveText
+                value={v.chapter_count ? String(v.chapter_count) : ''}
+                onSave={(t) => {
+                  const n = parseInt(t, 10)
+                  saveVolume(v.id, { chapter_count: Number.isFinite(n) && n > 0 ? n : null })
+                }}
+                placeholder="自动"
+                size="small"
+                style={{ width: 64 }}
+              />
+              <span>（生成细纲时按此数量出章；留空则按已有章节数，都没有时默认 10）</span>
             </div>
           </Card>
         ))