feat(conversation): replicate in-place user message editing (TODO 03)

src/main/ipc.ts

@@ -29,7 +29,7 @@ import { createInteractionBroker, respondToInteraction } from './interaction-bro
 import { attachmentPrompt, commitAttachments, getAttachment, removeAttachment, stageAttachment, stageAttachmentPath } from './attachments'
 import { transcribeAudio } from './speech'
 import { getRevertChanges } from '@shared/revert'
-import { restoreWorkspaceFiles } from './workspace-revert'
+import { restoreWorkspaceFiles, rollbackEditedArtifacts } from './workspace-revert'
 import { assistantWireHistory } from './agent/history'
 import * as models from './models'
 import * as workspaces from './workspaces'
@@ -563,7 +563,10 @@ export function registerIpc(getWindow: () => BrowserWindow | null): void {
       }
       const target = history[targetIndex]
       if (!target || target.role !== 'user') throw new Error('未找到对应用户消息')
-      if (kernel) {
+      // 原版编辑语义（userMessage.edit.hint）：产物回退至此消息前版本，再从此处重新开始对话。
+      const editUndo = payload.action === 'edit' ? await rollbackEditedArtifacts(workspaceRoot, history, payload.fromMessageId!) : undefined
+      try {
+        if (kernel) {
         if (target.nativeSessionPath && target.nativeSessionPath !== ompSessionPath(sessionId)) throw new Error('这条历史消息没有当前 OMP 会话的分支记录')
         let entryId = target.nativeEntryId
         if (!entryId) {
@@ -588,6 +591,10 @@ export function registerIpc(getWindow: () => BrowserWindow | null): void {
         }
         const entry = ompKernels.get(sessionId)
         if (entry && entryId) entry.appliedBranchId = entryId
+        }
+      } catch (error) {
+        if (editUndo) await editUndo().catch(() => undefined)
+        throw error
       }
       history = history.slice(0, targetIndex)
     }

src/main/workspace-revert.ts

@@ -2,6 +2,8 @@ import { promises as fs } from 'node:fs'
 import { dirname, isAbsolute, relative, resolve, sep, join } from 'node:path'
 import { randomUUID } from 'node:crypto'
 import type { RevertChange } from '@shared/revert'
+import { getRevertChanges } from '@shared/revert'
+import type { ChatMessage } from '@shared/types'
 
 async function replaceFile(path: string, content: string | null): Promise<void> {
   if (content === null) { await fs.unlink(path); return }
@@ -33,3 +35,14 @@ export async function restoreWorkspaceFiles(workspace: string, changes: RevertCh
   } catch (error) { await undo(); throw error }
   return undo
 }
+
+/**
+ * 编辑提交前的产物回退（原版 userMessage.edit.hint：产物回退至此消息前版本）。
+ * 返回撤销函数；该消息之后没有可回退的写入时返回 undefined。
+ * 记录不完整时由 getRevertChanges 抛错，调用方应中止提交而不是静默保留文件修改。
+ */
+export async function rollbackEditedArtifacts(workspace: string, messages: ChatMessage[], userMessageId: string): Promise<(() => Promise<void>) | undefined> {
+  const changes = getRevertChanges(messages, userMessageId)
+  if (!changes.length) return undefined
+  return restoreWorkspaceFiles(workspace, changes)
+}