feat: 添加 weread 启停命令 & 修复 macOS SSL 证书问题

- 新增 weread CLI 脚本，支持 weread start/stop [port] 一键管理服务
- app.py 端口改为从环境变量 WEREAD_PORT 读取，默认 8080
- 修复 macOS Python urllib 调用微信读书 API 时 SSL 证书验证失败问题（引入 certifi）

app.py

@@ -18,6 +18,7 @@
 
 import json
 import os
+import ssl
 import subprocess
 import time
 import urllib.request
@@ -25,6 +26,12 @@ from datetime import datetime
 from functools import wraps
 
 import pymysql
+
+try:
+    import certifi
+    _ssl_context = ssl.create_default_context(cafile=certifi.where())
+except ImportError:
+    _ssl_context = ssl.create_default_context()
 from flask import Flask, jsonify, render_template, request
 
 # ======================================================================
@@ -158,7 +165,7 @@ def weread_api_call(api_name, **kwargs):
         },
         method="POST",
     )
-    with urllib.request.urlopen(req, timeout=30) as resp:
+    with urllib.request.urlopen(req, timeout=30, context=_ssl_context) as resp:
         return json.loads(resp.read().decode("utf-8"))
 
 
@@ -1270,5 +1277,6 @@ if __name__ == "__main__":
     else:
         print(f"[信息] {msg}")
 
-    # 启动 Flask 服务，监听 8080 端口
-    app.run(host="0.0.0.0", port=8080, debug=False)
+    # 启动 Flask 服务，端口从环境变量 WEREAD_PORT 读取，默认 8080
+    port = int(os.environ.get("WEREAD_PORT", 8080))
+    app.run(host="0.0.0.0", port=port, debug=False)