✨ chapter re-ordering

src/main/ipcHandlers.ts

@@ -1,5 +1,5 @@
 import { ipcMain } from 'electron'
-import { listDraftFiles, readMarkdownFile, writeMarkdownFile, getProjectWordCount } from './fileSystem'
+import { listDraftFiles, readMarkdownFile, writeMarkdownFile, getProjectWordCount, saveOrderFile } from './fileSystem'
 import { streamMessage } from './aiService'
 import type { AIPayload } from '../renderer/types/editor'
 
@@ -20,6 +20,10 @@ export function registerIpcHandlers(): void {
     return await getProjectWordCount()
   })
 
+  ipcMain.handle('fs:saveOrder', async (_event, order: Record<string, string[]>) => {
+    await saveOrderFile(order)
+  })
+
   ipcMain.handle('ai:streamMessage', async (event, payload: AIPayload) => {
     try {
       await streamMessage(payload, (chunk: string) => {