修复: 对话轨迹生成锚点回归与耗时口径

生成中锚点改真实末条,修第二轮打字机与工具卡不渲染回归
轨迹总耗时计入末轮时长,单卡耗时剔除审批等待区间
聚合文案与截断常量下沉共用,时长进位边界钳制

src/components/ToolResultBody.vue

@@ -38,7 +38,7 @@
       <span class="ai-tool-file-icon ai-tool-file-icon--dir" v-html="dirIcon"></span>
       <span class="ai-tool-file-path">{{ parsed?.path }}</span>
       <span class="ai-tool-file-meta">{{ parsed?.entries?.length || 0 }} {{ $t('aiTool.items') }}</span>
-      <span v-if="parsed?.truncated" class="ai-tool-file-meta ai-tool-file-meta--warn">{{ $t('aiTool.dirTruncated', { n: 1000 }) }}</span>
+      <span v-if="parsed?.truncated" class="ai-tool-file-meta ai-tool-file-meta--warn">{{ $t('aiTool.dirTruncated', { n: DIR_TRUNCATE_LIMIT }) }}</span>
     </div>
     <div class="ai-tool-dir-entries">
       <div
@@ -234,6 +234,7 @@ import {
   dirIcon,
   fileIcon,
   searchIcon,
+  DIR_TRUNCATE_LIMIT,
 } from '@/composables/ai/useToolCard'
 import { parseDiffLines } from '@/composables/ai/useToolCardRender'
 import type { AiToolCallInfo } from '@/api/types'