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/workbenchAiCommandIntentModel.js

@@ -0,0 +1,130 @@
+const DRAFT_DELETION_ACTION_PATTERN = /删除|删掉|删了|移除|作废|撤销/
+const DRAFT_DELETION_TARGET_PATTERN = (
+  /草稿|这个单据|这张单据|当前单据|当前申请|当前报销|刚才保存的草稿|刚才的草稿|上面的单据|最近的单据|申请单|报销单/
+)
+const NON_DRAFT_DELETE_TARGET_PATTERN = /附件|票据|发票|图片|文件|明细|费用行/
+const DELETABLE_DRAFT_STATUS = new Set(['', 'draft', 'pending', '待提交', '草稿'])
+const SUBMITTED_OR_FINAL_STATUS = new Set([
+  'submitted',
+  'approved',
+  'completed',
+  'paid',
+  'archived',
+  'deleted',
+  'rejected',
+  'returned',
+  '审批中',
+  '已审批',
+  '已完成',
+  '已付款',
+  '已归档',
+  '已删除',
+  '已驳回',
+  '已退回'
+])
+
+function normalizeCompactText(value = '') {
+  return String(value || '').replace(/\s+/g, '').trim()
+}
+
+function normalizeDraftDocumentType(payload = {}, claimNo = '') {
+  const rawType = String(payload.document_type || payload.documentType || payload.draft_type || payload.draftType || '').trim()
+  if (/application|expense_application|申请/.test(rawType)) {
+    return 'application'
+  }
+  if (/reimbursement|expense|报销/.test(rawType)) {
+    return 'reimbursement'
+  }
+  return /^A/i.test(String(claimNo || '').trim()) ? 'application' : 'reimbursement'
+}
+
+function normalizeDraftPayload(payload = null, sourceText = '') {
+  if (!payload || typeof payload !== 'object') {
+    return null
+  }
+  const claimId = String(payload.claim_id || payload.claimId || payload.id || '').trim()
+  const claimNo = String(payload.claim_no || payload.claimNo || payload.document_no || payload.documentNo || '').trim()
+  if (!claimId && !claimNo) {
+    return null
+  }
+  const status = String(payload.status || payload.status_label || payload.statusLabel || '').trim()
+  if (SUBMITTED_OR_FINAL_STATUS.has(status.toLowerCase()) || SUBMITTED_OR_FINAL_STATUS.has(status)) {
+    return null
+  }
+  if (!DELETABLE_DRAFT_STATUS.has(status.toLowerCase()) && !DELETABLE_DRAFT_STATUS.has(status) && !/草稿/.test(sourceText)) {
+    return null
+  }
+  return {
+    claimId,
+    claimNo,
+    status: status || 'draft',
+    documentType: normalizeDraftDocumentType(payload, claimNo)
+  }
+}
+
+function extractDraftPayloadFromSuggestedActions(message = {}) {
+  const actions = Array.isArray(message?.suggestedActions) ? message.suggestedActions : []
+  for (const action of [...actions].reverse()) {
+    const actionType = String(action?.action_type || action?.actionType || '').trim()
+    if (actionType !== 'open_application_detail') {
+      continue
+    }
+    const payload = normalizeDraftPayload(action.payload, String(message.content || message.text || ''))
+    if (payload) {
+      return payload
+    }
+  }
+  return null
+}
+
+export function isWorkbenchDraftDeletionIntent(prompt = '') {
+  const compact = normalizeCompactText(prompt)
+  if (!compact || !DRAFT_DELETION_ACTION_PATTERN.test(compact)) {
+    return false
+  }
+  if (NON_DRAFT_DELETE_TARGET_PATTERN.test(compact) && !/草稿|单据|申请单|报销单/.test(compact)) {
+    return false
+  }
+  return DRAFT_DELETION_TARGET_PATTERN.test(compact)
+}
+
+export function resolveLatestWorkbenchDraftPayload(messages = []) {
+  const safeMessages = Array.isArray(messages) ? messages : []
+  for (const message of [...safeMessages].reverse()) {
+    const sourceText = String(message?.content || message?.text || '')
+    const actionPayload = extractDraftPayloadFromSuggestedActions(message)
+    if (actionPayload) {
+      return actionPayload
+    }
+    const draftPayload = normalizeDraftPayload(message?.draftPayload, sourceText)
+    if (draftPayload) {
+      return draftPayload
+    }
+  }
+  return null
+}
+
+export function buildWorkbenchDraftDeletionGuidance(draftPayload = {}) {
+  const claimNo = String(draftPayload.claimNo || draftPayload.claim_no || '').trim()
+  const claimId = String(draftPayload.claimId || draftPayload.claim_id || '').trim()
+  const documentType = String(draftPayload.documentType || draftPayload.document_type || 'reimbursement').trim()
+  const reference = claimNo || claimId || '最近这张草稿'
+  return {
+    content: [
+      '### 已识别到您想删除草稿',
+      `我找到了最近这张草稿：**${reference}**。`,
+      '删除草稿会影响单据和附件关联，我不会直接替您删除。请先打开详情页，在详情页点击 **删除草稿** 并完成二次确认。'
+    ].join('\n\n'),
+    suggestedActions: [{
+      label: claimNo ? `查看草稿 ${claimNo}` : '查看草稿详情',
+      description: '打开详情页后可点击删除草稿并二次确认。',
+      icon: 'mdi mdi-open-in-new',
+      action_type: 'open_application_detail',
+      payload: {
+        claim_id: claimId,
+        claim_no: claimNo,
+        document_type: documentType
+      }
+    }]
+  }
+}