新增: 批次工作落地(推进链/评估闭环/事件总线/并发/加固) + 技术债清理 + 文档整理

后端:
- 工作流推进链(D-03):advance_task/状态机/闸门走 df-nodes Node trait,conditions 条件引擎扩展
- 想法评估闭环:启发式评分+对抗评估,df-ideas/scoring + df-storage/idea_eval_repo + idea 前端打通
- 全局事件数据总线:df-ai/context+context_helpers+augmentation 跨模块解耦
- AI planner/plan_hint/intent:aichat B 路线并行多轮基础
- patch_file 加固(TD-03/04):读改写整体锁防 lost update,expected_hash 合约闭环
- 压缩超时兜底(F-15 卡死根治)
- F-09 多会话并发:LlmConcurrency per-conv + streamingGuard 前端守护 + verify 脚本
- 知识注入 DRY/skills/audit 扩展

清理:
- aichat 技术债(误报 allow/死导入/过时注释 30 项)
- URGENT.md 删除(11 项加急全解决/迁 todo)
- 文档整理(todo/待决策/待审查/ARCHITECTURE/INDEX + 总线/技术债审查新文档)

src/views/Tasks.vue

@@ -66,8 +66,8 @@
                     <span class="branch-icon">⑂</span>
                     {{ task.branch_name }}
                   </span>
-                  <span class="task-date">{{ formatRelativeZh(task.created_at) }}</span>
-                  <span class="task-time">{{ formatRelativeZh(task.updated_at) }}</span>
+                  <span class="task-date">{{ formatRelative(task.created_at) }}</span>
+                  <span class="task-time">{{ formatRelative(task.updated_at) }}</span>
                 </div>
               </div>
               <span class="status-tag" :class="taskStatusClass(task.status)">{{ $t(statusLabel(task.status)) }}</span>
@@ -112,7 +112,7 @@ import { ref, computed, onMounted, watch } from 'vue'
 import { useRouter } from 'vue-router'
 import { useI18n } from 'vue-i18n'
 import { useProjectStore } from '@/stores/project'
-import { formatRelativeZh } from '@/utils/time'
+import { formatRelative } from '@/utils/time'
 import { taskStatusLabel as statusLabel, taskStatusClass, priorityLabel, priorityClass } from '../constants/project'
 import type { TaskRecord } from '@/api/types'