feat(mc-server-status): 服务器列表 Web 管理页 / 数据层抽离 / mcstatus 13 适配

- services/servers.py：校验 + 读写 + 增删改收敛成一份数据层（顶层不 import nonebot，
  可脱离运行时单测），群命令与 Web API 都只经它改数据，校验不再各写一套
- web_hub.py + /hub/mc_server_status 页面：按群列出服务器，抽屉新增/编辑（改名）/
  测试连接，行内删除（删空一台连带删群）；每条路由自带 require_admin
- handlers/server.py 改为薄封装，只在需要命令特有提示时自己判断
- services/mc.py 的图标属性名兼容 mcstatus ≥13 的 icon（旧版叫 favicon，
  读错会把整条查询打成"查询失败"）
- tests/test_mc_servers.py：数据层归一/改名/删群/坏文件兜底 + 图标解码两版属性名

Co-Authored-By: Claude Code <noreply@anthropic.com>

hexi/plugins/nonebot_plugin_mc_server_status/handlers/server.py

@@ -14,7 +14,8 @@ from nonebot.log import logger
 from nonebot.params import RegexGroup
 from nonebot.plugin import PluginMetadata
 
-from ..config import pc, save_file, var
+from ..config import pc, var
+from ..services import servers as store
 from ..services.mc import check_mc_status
 
 __plugin_meta__ = PluginMetadata(
@@ -76,18 +77,13 @@ async def _(mp=RegexGroup()):
         return
     group = int(mp[1])
     new_server_name = mp[2]
-    server_host = mp[3]
-    server_type = mp[4].lower()
-    if server_type not in ["js", "bds"]:
-        await add_server.finish("类型请填js或bds")
-    if group not in var.group_list:
-        var.group_list[group] = {new_server_name: [server_host, server_type]}
-    else:
-        for server_name in var.group_list[group]:
-            if new_server_name == server_name:
-                await add_server.finish("有同名服务器啦！")
-        var.group_list[group][new_server_name] = [server_host, server_type]
-    save_file()
+    if new_server_name in var.group_list.get(group, {}):
+        await add_server.finish("有同名服务器啦！")
+    # 校验 + 落盘都在 services/servers.py（与 Web 管理台同一套）
+    try:
+        store.set_server(group, new_server_name, mp[3], mp[4])
+    except store.ServerError as e:
+        await add_server.finish("类型请填js或bds" if "类型请填" in str(e) else str(e))
     await add_server.finish("添加成功")
 
 
@@ -96,18 +92,11 @@ async def _(mp=RegexGroup()):
     if not mp[0]:
         await del_server.finish(f"删除服务器 [群号] [名称]")
         return
-    group = int(mp[1])
-    name = mp[2]
-    if group not in var.group_list:
-        await del_server.finish("这个群没有添加服务器")
-    if name in var.group_list[group]:
-        var.group_list[group].pop(name)
-        if not var.group_list[group]:
-            var.group_list.pop(group)
-        save_file()
-        await del_server.finish("删除成功")
-    else:
-        await del_server.finish("没找到该名称的服务器")
+    try:
+        store.delete_server(int(mp[1]), mp[2])
+    except store.ServerError as e:
+        await del_server.finish(str(e))
+    await del_server.finish("删除成功")
 
 
 @list_all.handle()
@@ -129,9 +118,9 @@ async def _(mp=RegexGroup()):
     if not mp[0]:
         await test_server.finish("测试服务器 [服务器地址] [类型]\n类型写js或bds，js是Java服务器，bds是基岩服务器")
         return
-    server_host = mp[1]
-    server_type = mp[2].lower()
-    if server_type not in ["js", "bds"]:
-        await add_server.finish("类型请填js或bds")
-    msg = await check_mc_status("测试", server_host, server_type)
-    await list_all.finish(msg)
+    try:
+        server_type = store.normalize_type(mp[2])
+    except store.ServerError as e:
+        await test_server.finish(str(e))
+    msg = await check_mc_status("测试", mp[1], server_type)
+    await test_server.finish(msg)