feat(web): AI 工作台意图规划与规划思考模型

- 新增 workbenchAiIntentPlannerModel，基于 LLM function_call 解析建单/草稿/提交意图，区分 model 与 rule_fallback 来源
- 新增 workbenchAiPlanningThinkingModel 合并规划思考事件流，按 eventId 去重合并
- application gate/preview 模型接入意图规划，usePersonalWorkbenchAiMode/useWorkbenchAiStewardFlow/useWorkbenchAiActionRouter 链路适配，支持上下文提交
- steward 服务与 stewardPlanModel 适配新动作结构，receipt-folder-view 微调样式
- 新增 intent-planner-model/application-context-submit/steward-actions-service 测试，更新 gate-model/action-router/plan-message-copy/fast-preview 测试

web/tests/workbench-ai-action-router.test.mjs

@@ -245,3 +245,147 @@ test('workbench standalone draft action asks before creating a new reimbursement
     label: '独立新建报销单'
   })
 })
+
+test('workbench steward executable submit action runs precheck before submit and writes result message', async () => {
+  const requests = []
+  const originalFetch = globalThis.fetch
+  globalThis.fetch = async (_url, options = {}) => {
+    const body = JSON.parse(String(options.body || '{}'))
+    requests.push(body)
+    if (body.action_type === 'run_duplicate_precheck') {
+      return {
+        ok: true,
+        async json() {
+          return {
+            action_type: 'run_duplicate_precheck',
+            status: 'succeeded',
+            message: '未发现重复或冲突申请，可以继续提交。',
+            result_payload: {
+              status: 'ok',
+              blocking: false
+            }
+          }
+        }
+      }
+    }
+    return {
+      ok: true,
+      async json() {
+        return {
+          action_type: 'submit_application',
+          status: 'succeeded',
+          message: '申请已提交审批。',
+          result_payload: {
+            draft_payload: {
+              claim_id: 'claim-app-1',
+              claim_no: 'A1BCDEF2'
+            }
+          }
+        }
+      }
+    }
+  }
+
+  try {
+    const messages = []
+    let messageSeq = 0
+    const createInlineMessage = (role, content, options = {}) => ({
+      id: options.id || `msg-${++messageSeq}`,
+      role,
+      content,
+      pending: Boolean(options.pending),
+      suggestedActions: Array.isArray(options.suggestedActions) ? options.suggestedActions : []
+    })
+    const replaceInlineMessage = (id, nextMessage) => {
+      const index = messages.findIndex((item) => item.id === id)
+      if (index >= 0) {
+        messages.splice(index, 1, nextMessage)
+      }
+    }
+    let persisted = false
+    const router = useWorkbenchAiActionRouter({
+      aiExpenseDraft: { value: null },
+      applicationFlow: {
+        isInlineSuggestedActionDisabled: () => false,
+        executeInlineApplicationPreviewAction: () => {}
+      },
+      assistantDraft: { value: '' },
+      attachmentFlow: {
+        confirmAiAttachmentAssociation: () => {}
+      },
+      conversationMessages: { value: messages },
+      createInlineMessage,
+      emit: () => {},
+      expenseFlow: {
+        linkAiExpenseApplication: () => {},
+        pushInlineExpenseSceneSelectionPrompt: () => {},
+        startAiApplicationPreviewFromAction: () => {},
+        startAiExpenseDraft: () => {}
+      },
+      focusAiModeInput: () => {},
+      hasInlineAttachmentOcrDetails: () => false,
+      persistCurrentConversation: () => {
+        persisted = true
+      },
+      replaceInlineMessage,
+      resolveLatestInlineUserPrompt: () => '2026-02-20 至 2026-02-23，去上海出差，交通火车，直接提交',
+      scrollInlineConversationToBottom: () => {},
+      selectedFiles: { value: [] },
+      startInlineConversation: () => {},
+      toast: () => {},
+      toggleInlineAttachmentOcrDetails: () => {}
+    })
+    const sourceMessage = {
+      suggestedActionsLocked: false
+    }
+
+    await router.handleInlineSuggestedAction({
+      label: '确认提交申请',
+      action_type: 'switch_session',
+      payload: {
+        steward_execute_action: true,
+        steward_plan_id: 'plan-submit-1',
+        steward_action_type: 'submit_application',
+        steward_action_requires_confirmation: true,
+        steward_action_step: {
+          step_id: 'task-app-1:05',
+          action_type: 'submit_application',
+          requires_confirmation: true
+        },
+        steward_current_task: {
+          task_id: 'task-app-1',
+          task_type: 'expense_application',
+          assigned_agent: 'application_assistant',
+          title: '上海出差申请',
+          summary: '2026-02-20 至 2026-02-23 去上海出差，交通火车。',
+          requested_action: 'submit',
+          ontology_fields: {
+            expense_type: 'travel',
+            time_range: '2026-02-20 至 2026-02-23',
+            location: '上海',
+            reason: '辅助国网仿生产服务器部署',
+            transport_mode: 'train'
+          },
+          missing_fields: [],
+          action_steps: [
+            { step_id: 'task-app-1:04', action_type: 'run_duplicate_precheck' },
+            { step_id: 'task-app-1:05', action_type: 'submit_application', requires_confirmation: true }
+          ]
+        },
+        carry_text: '2026-02-20 至 2026-02-23，去上海出差，交通火车，直接提交'
+      }
+    }, sourceMessage)
+
+    assert.equal(requests.length, 2)
+    assert.equal(requests[0].action_type, 'run_duplicate_precheck')
+    assert.equal(requests[1].action_type, 'submit_application')
+    assert.equal(requests[1].confirmed, true)
+    assert.equal(requests[1].context_json.precheck_result.status, 'ok')
+    assert.equal(sourceMessage.suggestedActionsLocked, true)
+    assert.equal(persisted, true)
+    assert.match(messages.at(-1).content, /申请已提交审批/)
+    assert.equal(messages.at(-1).suggestedActions[0].action_type, 'open_application_detail')
+  } finally {
+    globalThis.fetch = originalFetch
+  }
+})