feat(web): AI 工作台命令意图解析与动作策略

- 新增 workbenchIntentFrameModel，解析删除/审批/查询/咨询政策等意图帧，含风险等级、目标模式（当前上下文/筛选候选）与日期归一化
- 新增 workbenchIntentActionPolicy，按意图帧路由下一步（直通/拦截批量/上下文确认/查询候选）
- 新增 workbenchAiCommandIntentModel 与 useWorkbenchAiCommandIntents，识别草稿删除意图并解析最近草稿载荷生成引导
- usePersonalWorkbenchAiMode 接入命令意图处理，personal-workbench-ai-mode.css 适配
- 新增 command-intent-model/intent-frame-model 测试

web/src/composables/workbenchAiMode/usePersonalWorkbenchAiMode.js

@@ -38,6 +38,7 @@ import { useWorkbenchAiStewardFlow } from './useWorkbenchAiStewardFlow.js'
 import {
   isReimbursementCreationIntent
 } from './workbenchAiApplicationGateModel.js'
+import { useWorkbenchAiCommandIntents } from './useWorkbenchAiCommandIntents.js'
 import {
   buildRuleFallbackWorkbenchAiIntentPlan,
   normalizeWorkbenchAiIntentPlan,
@@ -164,6 +165,24 @@ export function usePersonalWorkbenchAiMode(props, emit) {
     scrollInlineConversationToBottom
   })
 
+  const commandIntents = useWorkbenchAiCommandIntents({
+    activateInlineConversation,
+    activeConversationTitle,
+    assistantDraft,
+    clearAiModeFiles: filesFlow.clearAiModeFiles,
+    closeWorkbenchDatePicker,
+    conversationId,
+    conversationMessages,
+    createInlineMessage,
+    documentQueryFlow,
+    inlineConversationAutoScrollPinned,
+    persistCurrentConversation,
+    removeWorkbenchDateTag,
+    scrollInlineConversationToBottom,
+    searchConversationId: AI_SEARCH_CONVERSATION_ID,
+    sending
+  })
+
   const attachmentFlow = useWorkbenchAiAttachmentAssociationFlow({
     aiAttachmentAssociationRuntime,
     conversationId,
@@ -728,8 +747,7 @@ export function usePersonalWorkbenchAiMode(props, emit) {
       return
     }
 
-    if (aiExpenseDraft.value && !isAiExpenseDraftComplete(aiExpenseDraft.value)) {
-      expenseFlow.advanceAiExpenseDraft(cleanPrompt, files)
+    if (commandIntents.handleInlineDraftDeletionIntent(cleanPrompt, entry)) {
       return
     }
 
@@ -737,6 +755,11 @@ export function usePersonalWorkbenchAiMode(props, emit) {
       return
     }
 
+    if (aiExpenseDraft.value && !isAiExpenseDraftComplete(aiExpenseDraft.value)) {
+      expenseFlow.advanceAiExpenseDraft(cleanPrompt, files)
+      return
+    }
+
     if (shouldRequestWorkbenchAiIntentPlan(cleanPrompt)) {
       void executeModelPlannedWorkbenchIntent(cleanPrompt, entry, files)
       return