优化: ai-chat 对话流布局与轨迹信息密度改造

- 分组行去统计化,调用统计归并轨迹卡头部
- 相对时间改时间分隔线,跨日显绝对时间
- 思考过程单行 pill 化,答案卡加 accent 边
- 工具卡短路径展示与耗时提示统一
- 高风险工具名单启动时同步后端注册表
- 自动重试改琥珀细条,红卡与手动重试仅终态
- 轨迹卡头并时间线行,显轮次号与绝对时间
- 运行中摘要补当前工具名与失败计数
- 执行中工具卡加实时计时,耗时统一人话口径
- 重试残留清理改标记匹配,替代中文子串硬编码

src/i18n/en/ai.ts

@@ -22,9 +22,9 @@ export default {
     errorAuth: 'Request failed: the API key is invalid or lacks permission.',
     errorTimeout: 'The response timed out. Please try again.',
     errorNetwork: 'Network connection failed. Please check your network.',
-    // CR-30-2 / F-260616-07(d) / decision a1: stream pre-failure retry bubble copy
-    // clarify this is an AI response (network/rate-limit) retry, not a tool failure (shown in card)
-    aiStreamRetry: '⚠ AI response failed, retrying ({attempt}/{max})…',
+    // CR-30-2 / F-260616-07(d) / decision a1: copy for the auto-retry transition line
+    // (neutral wording: a retry is transient, not a terminal failure; exhausted retries still surface the AiError card)
+    aiStreamRetry: 'Connection interrupted, auto-retrying ({attempt}/{max})…',
     // Fatal errors (4xx/auth) are not retryable — prompt user to check settings instead
     notRetryable: 'This error cannot be resolved by retrying. Please check the configuration.',
     streamInterruptedAfterTool: '⚠ The tool finished, but the following reply was interrupted (no data stream for a long time). You can click Continue to retry.',
@@ -67,6 +67,7 @@ export default {
       duration: 'total {time}',
       expand: 'Expand trace',
       collapse: 'Collapse trace',
+      roundN: 'Round {n}',
       processOnly: 'Process log',
       stepDone: '✓ {n} calls done',
       stepRunning: 'running {name}',