feat(wish-tree): 许愿树游戏化改造

- 前端：全屏Canvas场景，夜空/云朵/草地/大树
- 前端：丝带系统，支持陀螺仪和麦克风交互
- 前端：弹幕许愿展示
- 前端：多棵树切换（祈福树/姻缘树/事业树）
- 后端：新增GET /api/wish/trees获取树列表
- 后端：新增GET /api/wish/tree/:id/wishes获取树许愿
- 后端：WishTree模型新增Type、Sort字段
- 后端：AutoMigrate自动处理表结构变更
- 后端：seedDefaultData自动初始化默认数据
- 数据库：wish_trees表新增type、sort字段

server/internal/handler/wish.go

@@ -9,6 +9,27 @@ import (
 	"github.com/gouki/lunar-server/internal/service"
 )
 
+// GetWishTrees 获取许愿树列表
+func GetWishTrees(c *gin.Context) {
+	wishService := service.NewWishService()
+	trees, err := wishService.GetWishTrees()
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{
+			"code": 500,
+			"msg":  "获取许愿树列表失败",
+		})
+		return
+	}
+
+	c.JSON(http.StatusOK, gin.H{
+		"code": 0,
+		"msg":  "success",
+		"data": gin.H{
+			"list": trees,
+		},
+	})
+}
+
 // GetWishTree 获取许愿树
 func GetWishTree(c *gin.Context) {
 	treeID, _ := strconv.Atoi(c.DefaultQuery("treeId", "1"))
@@ -95,6 +116,29 @@ func CreateWish(c *gin.Context) {
 	})
 }
 
+// GetTreeWishes 获取指定树的许愿列表
+func GetTreeWishes(c *gin.Context) {
+	treeID, _ := strconv.Atoi(c.Param("id"))
+
+	wishService := service.NewWishService()
+	wishes, err := wishService.GetTreeWishes(uint(treeID))
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{
+			"code": 500,
+			"msg":  "获取许愿列表失败",
+		})
+		return
+	}
+
+	c.JSON(http.StatusOK, gin.H{
+		"code": 0,
+		"msg":  "success",
+		"data": gin.H{
+			"list": wishes,
+		},
+	})
+}
+
 // GetWishList 获取许愿列表
 func GetWishList(c *gin.Context) {
 	treeID, _ := strconv.Atoi(c.DefaultQuery("treeId", "1"))