feat: 新增客户端问题主动上报与控制台问题汇总功能

1. 客户端 (ticketmachine.lua): 修改 showAlert 支持详细错误并主动上报，使用 pcall 包装主循环捕获 Fatal Error 并上报。
2. 服务端 (data.js, api.js): 增加 issues 数据表，提供 /report_issue 和 /issues 接口。
3. 控制台 (index.html, index.js): 添加“问题汇总”菜单及界面状态管理。

web/index.html

@@ -73,6 +73,9 @@
                 <div class="nav-item" :class="{active: currentView === 'iccards'}" @click="currentView = 'iccards'">
                     <span class="nav-icon"><i class="fas fa-credit-card"></i></span> IC卡管理
                 </div>
+                <div class="nav-item" :class="{active: currentView === 'issues'}" @click="currentView = 'issues'">
+                    <span class="nav-icon"><i class="fas fa-exclamation-triangle"></i></span> 问题汇总
+                </div>
                 <div class="nav-item" :class="{active: currentView === 'assets'}" @click="currentView = 'assets'">
                     <span class="nav-icon"><i class="fas fa-route"></i></span> 线路图上传
                 </div>
@@ -893,6 +896,7 @@
                     </div>
                 </div>
 
+                <!-- 日志 -->
                 <div v-if="currentView === 'logs'">
                     <div class="card">
                         <div class="flex between mb-4" style="flex-wrap: wrap; gap: 10px;">
@@ -947,6 +951,49 @@
                     </div>
                 </div>
 
+                <!-- 问题汇总 -->
+                <div v-if="currentView === 'issues'">
+                    <div class="card">
+                        <div class="flex between mb-4" style="flex-wrap: wrap; gap: 10px;">
+                            <h4>问题汇总</h4>
+                            <div class="flex" style="gap: 8px;">
+                                <button @click="fetchIssues" title="刷新"><i class="fas fa-sync-alt"></i></button>
+                            </div>
+                        </div>
+
+                        <table v-if="issues && issues.length > 0">
+                            <thead>
+                                <tr>
+                                    <th>时间</th>
+                                    <th>设备</th>
+                                    <th>车站</th>
+                                    <th>错误信息</th>
+                                    <th>详细信息</th>
+                                </tr>
+                            </thead>
+                            <tbody>
+                                <tr v-for="(issue, idx) in issues" :key="idx">
+                                    <td style="white-space: nowrap;">{{ formatTime(issue.ts) }}</td>
+                                    <td class="mono">{{ issue.device || issue.machine_id }}</td>
+                                    <td>{{ issue.station_code }}</td>
+                                    <td style="color: var(--danger); font-weight: bold;">{{ issue.error_msg }}</td>
+                                    <td>
+                                        <details v-if="issue.detail">
+                                            <summary class="text-muted" style="cursor: pointer;">查看详情</summary>
+                                            <pre style="white-space: pre-wrap; margin: 8px 0 0; font-size: 0.85rem; line-height: 1.35; color: #fff;">{{ issue.detail }}</pre>
+                                        </details>
+                                        <span v-else class="text-muted">无</span>
+                                    </td>
+                                </tr>
+                            </tbody>
+                        </table>
+                        <div v-else class="empty-state">
+                            <i class="fas fa-check-circle" style="font-size: 48px; margin-bottom: 16px; opacity: 0.3; color: var(--success);"></i>
+                            <p>暂无问题上报记录</p>
+                        </div>
+                    </div>
+                </div>
+
                 <footer class="site-footer">
                     <a href="https://beian.miit.gov.cn/" target="_blank" rel="noopener noreferrer">粤ICP备2025450093号</a>
                     <span class="version">v1.0.12</span>