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/src/composables/workbenchAiMode/workbenchAiPlanningThinkingModel.js

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+export function mergeWorkbenchAiThinkingEvents(...groups) {
+  const merged = []
+  const indexById = new Map()
+  groups.flat().filter(Boolean).forEach((event) => {
+    const eventId = String(event.eventId || event.event_id || '').trim()
+    if (!eventId || !indexById.has(eventId)) {
+      if (eventId) {
+        indexById.set(eventId, merged.length)
+      }
+      merged.push(event)
+      return
+    }
+    const index = indexById.get(eventId)
+    merged.splice(index, 1, {
+      ...merged[index],
+      ...event,
+      eventId
+    })
+  })
+  return merged
+}
+
+export function completeWorkbenchAiThinkingEvents(events = []) {
+  return events.map((event) => ({
+    ...event,
+    status: event.status === 'failed' ? 'failed' : 'completed'
+  }))
+}
+
+export function buildInitialModelPlanningThinkingEvents() {
+  return [
+    {
+      eventId: 'model-planning-intent',
+      title: '判断办理意图',
+      content: '正在判断这句话是要办申请、做报销、处理附件，还是普通咨询。',
+      status: 'running'
+    }
+  ]
+}
+
+export function buildModelPlanningProgressSchedule() {
+  return [
+    {
+      delayMs: 900,
+      event: {
+        eventId: 'model-planning-slots',
+        title: '抽取关键信息',
+        content: '正在整理日期、地点、事由、交通方式、附件和“保存/提交”等动作线索。',
+        status: 'running'
+      }
+    },
+    {
+      delayMs: 2200,
+      event: {
+        eventId: 'model-planning-steps',
+        title: '规划执行步骤',
+        content: '正在生成可执行动作序列，例如填充申请表、校验必填项、保存草稿或发起提交。',
+        status: 'running'
+      }
+    },
+    {
+      delayMs: 5200,
+      event: {
+        eventId: 'model-planning-tools',
+        title: '匹配业务工具',
+        content: '正在把模型计划映射到白名单工具，避免未确认的提交或附件关联直接产生副作用。',
+        status: 'running'
+      }
+    },
+    {
+      delayMs: 9000,
+      event: {
+        eventId: 'model-planning-fallback',
+        title: '准备兜底策略',
+        content: '如果模型等待过久或调用失败，会按保守规则继续识别，保证申请、报销和草稿流程还能推进。',
+        status: 'running'
+      }
+    }
+  ]
+}