refactor(bf-bot): 插件重构为 handlers/services/utils 分层，资源归入 res/

- 旧平铺模块（data/data_utils/database_op/image_builder*/get_bf6_data/
  gametools_bf6/bf6_data/img_utils）拆分为 handlers（绑定/查询）、
  services（fetchers/processing/query）、utils（渲染/参数）分层；
  新增 repository.py / config.py / paths.py
- 字体/图片/模板资源迁入 res/，新增 BF2042 卡面素材（bg/object_icon 等）
- browser_ext/：BF2042 扩展捕获桥（WS 直连兜底通道）源码入库
- 新增 hexi/web/src/plugins/bf_bot 前端管理页
- 新增 tests：test_bf_bot_helpers / repository / tracker_api

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

hexi/plugins/nonebot_plugin_bf_bot/handlers/binding.py

@@ -0,0 +1,39 @@
+"""绑定管理命令：/bfbind(绑定) /unbind(解绑) /update_bind(修改绑定)。"""
+
+from nonebot import on_command
+from nonebot.adapters import Event, Message
+from nonebot.params import CommandArg
+from nonebot.rule import to_me
+from nonebot_plugin_alconna import UniMessage
+
+from ..services import binding as binding_service
+
+bind_cmd = on_command("bfbind", rule=to_me(), aliases={"绑定"}, block=True)
+unbind_cmd = on_command("unbind", rule=to_me(), aliases={"解绑"}, block=True)
+update_bind_cmd = on_command(
+    "update_bind", rule=to_me(), aliases={"修改绑定"}, block=True
+)
+
+
+async def _reply(event: Event, text: str) -> None:
+    await UniMessage.at(user_id=event.get_user_id()).text(text).send()
+
+
+@bind_cmd.handle()
+async def handle_bind(event: Event, msg: Message = CommandArg()):
+    text = await binding_service.bind(event.get_user_id(), msg.extract_plain_text())
+    await _reply(event, text)
+
+
+@unbind_cmd.handle()
+async def handle_unbind(event: Event):
+    text = await binding_service.unbind(event.get_user_id())
+    await _reply(event, text)
+
+
+@update_bind_cmd.handle()
+async def handle_update_bind(event: Event, msg: Message = CommandArg()):
+    text = await binding_service.update_bind(
+        event.get_user_id(), msg.extract_plain_text()
+    )
+    await _reply(event, text)