feat: 群日报 9 宫格头像自动反推 + 持续时长语义 + 自动登录

- group-report-service: enrichAvatarsFromGroup 从群成员快照反推真头像
  - group-report-service: 修 SVG data URL 正则,fallback 现在能正常嵌入
  - group-report (shared): GroupReportMetadata/Result 加 talker/warnings 字段
  - timeSpan 改为持续时长(\"1 h\" / \"30 min\" / \"2 d\" 紧凑半角)
  - App.tsx 启动自动连接(env var + safeStorage)
  - Wcdb4Client 父目录自动解析为最新 wxid
  - HTTP server EADDRINUSE 友好提示 + 指数退避
  - installSafeConsole 修 EPIPE crash
  - SettingsPanel 测试连接后自动更新 dbRoot

resources/mobile_daily_report.html

@@ -44,6 +44,11 @@
         align-items: center;
         justify-content: space-between;
         gap: 14px;
+        min-width: 0;
+      }
+      .hero-top > div:first-child {
+        min-width: 0;
+        flex: 1 1 auto;
       }
       .hero h1 {
         font-size: 23px;
@@ -82,11 +87,15 @@
         border-radius: 12px;
         padding: 10px 6px;
         text-align: center;
+        min-width: 0;
+        overflow: hidden;
       }
       .stat b {
         display: block;
         font-size: 18px;
         color: #07a352;
+        white-space: nowrap;
+        line-height: 1.25;
       }
       .stat span {
         font-size: 11px;
@@ -420,7 +429,7 @@
         <div class="stats">
           <div class="stat"><b>{{MESSAGE_COUNT}}</b><span>消息数</span></div>
           <div class="stat"><b>{{ACTIVE_USERS}}</b><span>活跃人数</span></div>
-          <div class="stat"><b>{{TIME_SPAN}}</b><span>时间跨度</span></div>
+          <div class="stat"><b>{{TIME_SPAN}}</b><span>持续时长</span></div>
           <div class="stat"><b>{{TOPIC_COUNT}}</b><span>主要话题</span></div>
         </div>
       </header>