refactor: 重构文件存储路径并清理冗余代码

- 将项目文件存储从 public/uploads 迁移至项目根目录专用目录
- 更新所有前端页面的路径提示文本与API请求路径
- 移除冗余的列车详情展开收起功能及相关代码
- 重构服务器端文件路径处理逻辑，增强路径访问安全性
- 清理旧注释和未使用的变量与函数

CloudServer/public/infoboard.html

@@ -184,19 +184,6 @@
             background: var(--bg-hover);
         }
 
-        .train-details {
-            display: none;
-            background: rgba(0, 0, 0, 0.2);
-            padding: 12px 20px;
-            font-size: 0.8rem;
-            color: var(--text-muted);
-            border-top: 1px solid var(--bg-border);
-        }
-
-        .train-details.open {
-            display: block;
-        }
-
         .trip-log {
             display: grid;
             grid-template-columns: 80px 1fr auto;
@@ -380,7 +367,6 @@
         };
 
         // --- State ---
-        let expandedTrains = new Set();
         let stationCodeMap = {};
         let broadcastingStations = new Set();
         let messageLog = [];
@@ -526,27 +512,8 @@
                     list.innerHTML = '<div style="padding:40px;text-align:center;color:var(--text-muted);font-size:0.8rem">暂无活跃列车</div>';
                 } else {
                     state.activeTrains.forEach(tr => {
-                        const isExpanded = expandedTrains.has(tr.trainId);
                         const div = document.createElement('div');
                         div.className = 'status-item train-item';
-                        div.onclick = () => toggleTrain(tr.trainId);
-
-                        let detailsHtml = '';
-                        if (tr.tripLogs && tr.tripLogs.length > 0) {
-                            detailsHtml = tr.tripLogs.slice().reverse().map(log => {
-                                const time = new Date(log.time).toLocaleTimeString();
-                                const stCode = stationCodeMap[log.station] || log.station;
-                                return `
-                                    <div class="trip-log">
-                                        <span>${time}</span>
-                                        <span style="color:var(--text-primary)">${stCode}</span>
-                                        <span style="color:${log.action === 'Arrival' ? 'var(--success)' : 'var(--warning)'}">${log.action === 'Arrival' ? '到达' : '出发'}</span>
-                                    </div>
-                                `;
-                            }).join('');
-                        } else {
-                            detailsHtml = '<div style="font-style:italic">暂无运行历史</div>';
-                        }
 
                         const currentStCode = stationCodeMap[tr.currentStation] || tr.currentStation || '-';
                         const statusColor = tr.status === 'At Station' ? 'var(--success)' : 'var(--warning)';
@@ -556,13 +523,9 @@
                                 <div style="display:flex; justify-content:space-between; align-items:center;">
                                     <div class="item-info">
                                         <div class="item-title">${tr.trainId} <span style="font-size:0.7rem; color:var(--text-muted); font-weight:normal; margin-left:8px;">${tr.destination || '未知终点'}</span></div>
-                                        <div class="item-sub">${currentStCode} <span style="color:${statusColor}; margin-left:8px;">${tr.status === 'At Station' ? '在站' : '运行中'}</span></div>
+                                        <div class="item-sub">${currentStCode} <span style="color:${statusColor}; margin-left:8px;">${tr.status === 'At Station' ? '在站' : (tr.status === 'Departed' ? '已发车' : '运行中')}</span></div>
                                     </div>
-                                    <div style="color:var(--text-muted)">${isExpanded ? ICONS.chevronUp : ICONS.chevronDown}</div>
-                                </div>
-                                <div class="train-details ${isExpanded ? 'open' : ''}" id="details-${tr.trainId}">
-                                    <div style="margin-bottom:8px;font-weight:600;font-size:0.7rem;text-transform:uppercase;color:var(--text-muted)">运行日志 (Trip Logs)</div>
-                                    ${detailsHtml}
+                                    <div class="status-dot ${tr.status === 'At Station' ? 'dot-online' : 'dot-warn'}"></div>
                                 </div>
                             </div>
                         `;
@@ -572,15 +535,6 @@
         }
     }
 
-        function toggleTrain(id) {
-            if (expandedTrains.has(id)) expandedTrains.delete(id);
-            else expandedTrains.add(id);
-            const details = document.getElementById(`details-${id}`);
-            if (details) {
-                details.classList.toggle('open');
-            }
-        }
-
         function updateStationDots() {
             const dots = document.querySelectorAll('[id^="station-dot-"]');
             dots.forEach(dot => {