重构为 HTTP SSO 扫码方案并引入 Vue3 前端

移除 Playwright 浏览器自动化，改用 passport/SSO HTTP 接口获取二维码与轮询登录；后端模块化拆分，前端替换为 Vue3 SPA。

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/proxy.py

@@ -0,0 +1,64 @@
+import json
+import logging
+import time
+
+import requests
+
+logger = logging.getLogger(__name__)
+
+
+def get_proxy_from_api(api_url, max_retries=3, timeout=10):
+    if not api_url:
+        return None
+    last_error = None
+    for attempt in range(max_retries):
+        try:
+            resp = requests.get(api_url, timeout=timeout)
+            resp.raise_for_status()
+            content = resp.text.strip()
+            if not content:
+                raise ValueError("代理 API 返回空内容")
+            try:
+                data = resp.json()
+                if "ip" in data and "port" in data:
+                    proxy_str = f"{data['ip']}:{data['port']}"
+                else:
+                    proxy_str = content
+            except json.JSONDecodeError:
+                proxy_str = content
+            if not proxy_str.startswith(("http://", "https://")):
+                proxy_str = f"http://{proxy_str}"
+            return {"server": proxy_str}
+        except Exception as e:
+            last_error = e
+            if attempt < max_retries - 1:
+                wait = 2 ** attempt
+                logger.warning("获取代理失败 (第%s次): %s，%ss 后重试", attempt + 1, e, wait)
+                time.sleep(wait)
+    logger.error("获取代理失败，已重试%s次: %s", max_retries, last_error)
+    return None
+
+
+def test_proxy_api(proxy_api):
+    proxy = get_proxy_from_api(proxy_api, timeout=5)
+    if not proxy:
+        return {"status": "error", "message": "获取代理失败"}
+    proxies = {"http": proxy["server"], "https": proxy["server"]}
+    test_urls = [
+        "http://httpbin.org/ip",
+        "https://api.ipify.org?format=json",
+    ]
+    last_err = None
+    for test_url in test_urls:
+        try:
+            resp = requests.get(test_url, proxies=proxies, timeout=10)
+            if resp.status_code == 200:
+                try:
+                    data = resp.json()
+                    ip = data.get("origin") or data.get("ip", "unknown")
+                except json.JSONDecodeError:
+                    ip = resp.text.strip()[:64] or "unknown"
+                return {"status": "success", "ip": ip, "message": "代理可用"}
+        except Exception as e:
+            last_err = e
+    return {"status": "error", "message": f"代理测试失败: {last_err}"}