feat: 管理员页面整合与侧边栏导航优化

- 完成系统管理页面与导航整合
- 在 users.html/topics.html/logs.html 侧边栏与移动导航添加系统管理入口
- 创建 admin.html 管理页面（案例/任务日志/LLM配置/系统配置）
- 新增核心模块：collector.py（数据采集器）、scheduler.py（任务调度器）
- 新增脚本：collector_db_integration.py（采集器数据库整合）
- 更新项目文档并验证路由注册

platform/frontend/logs.html

@@ -71,7 +71,7 @@
                         <el-date-picker v-model="logDate" type="date" placeholder="选择日期" format="YYYY-MM-DD" value-format="YYYY-MM-DD" size="default"></el-date-picker>
                         <el-button type="primary" @click="fetchLogs" :loading="loadingLogs">加载日志</el-button>
                     </div>
-                    <el-card v-if="logContent" class="font-mono text-sm bg-gray-50" style="max-height: 600px; overflow-y: auto; background: #f9fafb; border: 1px solid #e5e7eb;"><pre style="margin: 0; white-space: pre-wrap; word-wrap: break-word;">{{ logContent }}</pre></el-card>
+                    <el-card v-if="logContent" ref="logContainer" class="font-mono text-sm bg-gray-50" style="max-height: 600px; overflow-y: auto; background: #f9fafb; border: 1px solid #e5e7eb;"><pre style="margin: 0; white-space: pre-wrap; word-wrap: break-word;">{{ logContent }}</pre></el-card>
                     <el-empty v-else description="请先选择类型和日期，然后点击加载"></el-empty>
                 </div>
             </main>
@@ -88,7 +88,17 @@
     <script src="element-plus.full.js"></script>
     <script>
         const LogsApp = {
-            data() { return { isLoggedIn: false, isAdmin: false, currentUser: { username: '' }, logType: 'creator', logDate: '', logContent: '', loadingLogs: false } },
+            data() {
+            const today = new Date().toISOString().split('T')[0]; // YYYY-MM-DD
+            return {
+                isLoggedIn: false,
+                isAdmin: false,
+                currentUser: { username: '' },
+                logType: 'creator',
+                logDate: today,
+                logContent: '',
+                loadingLogs: false
+            } },
             methods: {
                 async fetchLogs() {
                     // 验证输入
@@ -113,6 +123,12 @@
                         // 后端返回: { type, date, content }
                         this.logContent = `日志类型：${data.type}\n日期：${data.date}\n\n${data.content || '(日志文件为空)'}`;
                         this.$message.success('日志加载成功');
+                        this.$nextTick(() => {
+                            const container = this.$refs.logContainer;
+                            if (container && container.$el) {
+                                container.$el.scrollTop = container.$el.scrollHeight;
+                            }
+                        });
                     } catch (error) {
                         console.error('获取日志失败:', error);
                         this.$message.error(`获取日志失败: ${error.message}`);