feat: v1.4.0 - 典型方案采纳、推荐方案列表、审计字段、导航优化

- 添加典型方案采纳功能 (POST /api/plans/<id>/adopt)
- 添加推荐方案列表 (GET /api/students/<id>/recommended-plans)
- PracticePlan 新增 created_by/updated_by/updated_at 审计字段
- 方案编辑/详情页导航优化 (bfcache 处理、pageshow 事件)
- 方案列表支持删除功能
- 学员列表'暂无方案/问题'样式统一
- 更新文档：问题文件已废弃（迁移到数据库）
- 更新部署脚本和验证清单

app/templates/goals.html

@@ -174,8 +174,34 @@
 {{ super() }}
 <script>
 const API_BASE = '/api/goals';
+const GOAL_FILTER_KEY = 'goal_filters';
 let allGoals = [];  // 缓存所有目标数据
 
+// 保存筛选状态
+function saveGoalFilterState() {
+    const state = {
+        filterLevel: document.getElementById('filter-level').value,
+        filterCategory: document.getElementById('filter-category').value,
+        groupBy: document.getElementById('group-by').value
+    };
+    sessionStorage.setItem(GOAL_FILTER_KEY, JSON.stringify(state));
+}
+
+// 恢复筛选状态
+function restoreGoalFilterState() {
+    const saved = sessionStorage.getItem(GOAL_FILTER_KEY);
+    if (!saved) return;
+    try {
+        const state = JSON.parse(saved);
+        if (state.filterLevel) document.getElementById('filter-level').value = state.filterLevel;
+        if (state.filterCategory) document.getElementById('filter-category').value = state.filterCategory;
+        if (state.groupBy) document.getElementById('group-by').value = state.groupBy;
+        saveGoalFilterState();
+    } catch (e) {
+        console.error('恢复目标筛选状态失败', e);
+    }
+}
+
 // 加载目标列表
 async function loadGoals() {
     const res = await fetch(API_BASE);
@@ -188,11 +214,14 @@ async function loadGoals() {
         return {...g, children: children};
     }));
 
+    restoreGoalFilterState();
     applyFilters();
 }
 
 // 应用筛选和分组
 function applyFilters() {
+    saveGoalFilterState();
+
     const filterLevel = document.getElementById('filter-level').value;
     const filterCategory = document.getElementById('filter-category').value;
     const groupBy = document.getElementById('group-by').value;