Add HeXi bot codebase: custom plugins, web frontends, tests

- hexi core: message handling, rate limiting, cooldown, plugin manager
- Custom plugins: BF stats, daily check-in, quotes, persona cards, etc.
- Community plugins vendored under hexi/plugins with local fixes
- Web admin frontends (learning-chat, persona-admin), unified hexi/web
- Tests for rate_limit/cooldown/memes/persona; poetry.lock

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

plugin_template/nonebot_plugin_template/web/admin.py

@@ -0,0 +1,40 @@
+"""插件 Web 子应用样例。
+
+- 由 `__init__.py` 里 `register_web_plugin("template", ..., module_name=__name__)` 注册，
+  hub 启动时自动挂载到 `/api/template`。
+- 鉴权统一走 `hexi.web_auth.require_admin`(OAuth2 + SQLite)；注意它本身是 FastAPI 的
+  `Depends` 实例，直接用 `_: dict = API` 注入，不要再包一层 `Depends(...)`。
+- 可直接读写 `hexi.web_config` 的插件配置。
+"""
+
+from __future__ import annotations
+
+from fastapi import FastAPI
+from fastapi.responses import HTMLResponse
+
+from hexi import web_config
+from hexi.web_auth import require_admin as API
+
+# 插件模块名(去掉 .web)：= NoneBot 模块名 = plugin_id
+_PLUGIN_ID = __package__.rsplit(".", 1)[0]
+
+
+def build_admin_app() -> FastAPI:
+    app = FastAPI(title="插件模板管理")
+
+    @app.get("/")
+    async def index(_: dict = API) -> HTMLResponse:
+        return HTMLResponse("<h1>插件模板 · Web 子应用</h1><p>鉴权已生效。</p>")
+
+    @app.get("/ping")
+    async def ping(_: dict = API):
+        return {"ok": True, "plugin": _PLUGIN_ID}
+
+    @app.get("/config")
+    async def get_config(_: dict = API):
+        cfg = web_config.get_config(_PLUGIN_ID)
+        if cfg is None:
+            return {"ok": False, "msg": "未注册配置 schema"}
+        return {"ok": True, "plugin": _PLUGIN_ID, **cfg}
+
+    return app