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>

hexi/plugins/nonebot_plugin_picfinder_take/config.py

@@ -0,0 +1,50 @@
+import os
+
+threshold = 70  # SauceNAO相似度阈值，低于该相似度自动追加ascii2d搜索
+
+SAUCENAO_KEY = "dfc2b9156f254754dee2ead531826020f6316f92"  # SauceNAO 的 API key
+
+SAUCENAO_RESULT_NUM = 3  # SauceNAO搜索结果显示数量
+
+ASCII_RESULT_NUM = 3  # ascii2d搜索结果显示数量
+
+SEARCH_TIMEOUT = 60  # 连续搜索模式超时时长
+
+DAILY_LIMIT = 50  # 搜图每日限额
+
+CHAIN_REPLY = True  # 是否启用合并转发回复模式
+
+THUMB_ON = True  # 是否启用缩略图
+
+CHECK = True  # 是否开启手机截屏判定
+
+IGNORE_STAMP = True  # 是否在批量搜索中忽略表情包
+
+HOST_CUSTOM = {
+    # 自定义Host，不使用留空即可
+    # 格式示例：'https://ascii2d.net' , 'http://localhost:12345'
+    'SAUCENAO': '',
+    'ASCII': ''
+}
+
+# ascii2d 的 Cloudflare cookie 文件(Netscape 格式,浏览器导出,参考 nonebot_plugin_video_analysis 的 cookies.txt 用法)
+# 获取方式:浏览器打开 ascii2d.net 过验证后,用 EditThisCookie / Cookie-Editor 扩展导出为 Netscape 格式,
+# 保存为 nonebot_plugin_picfinder_take/data/cookies_ascii2d.txt
+# 留空则使用 playwright 无 cookie 尝试(可能无法通过 Cloudflare 验证)
+ASCII2D_COOKIES_FILE = os.path.join(
+    os.path.dirname(os.path.abspath(__file__)), "data", "cookies_ascii2d.txt"
+)
+
+proxies = {
+    'http': '',
+    'https': ''
+}  # 网络代理
+
+enableguild = {0000: [00000, 1111], 123456: [2345]}  # 频道白名单 格式{频道id: [子频道id]}
+
+helptext = '''
+(xx为bot名称)
+[@bot+图片] 单张/多张搜图
+[xx搜图] 进入批量搜图模式
+[谢谢xx] 退出批量搜图模式
+'''.strip()