feat: click 'x个方案' to open latest plan detail

app/models.py

@@ -139,6 +139,10 @@ class Student(db.Model):
         goal_count = len(self.goal_records) if self.goal_records else 0
         completed_goal_count = sum(1 for g in self.goal_records if g.achievement_date) if self.goal_records else 0
 
+        # 获取最新方案ID
+        latest_plan = self.plans.order_by(db.desc("created_at")).first()
+        latest_plan_id = latest_plan.id if latest_plan else None
+
         return {
             "id": self.id,
             "name": self.name,
@@ -154,6 +158,7 @@ class Student(db.Model):
             "problem_count": self.problems.count(),
             "problem_names": problem_names,  # 问题名称列表（按严重程度排序）
             "plan_count": self.plans.count(),
+            "latest_plan_id": latest_plan_id,
             "goal_count": goal_count,
             "completed_goal_count": completed_goal_count,
         }