扫码登录，获取cookies

frontend/templates/login.html

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+{% extends "base.html" %}
+
+{% block title %}Login - Weibo-HotSign{% endblock %}
+
+{% block extra_css %}
+<style>
+    .auth-container {
+        max-width: 400px;
+        margin: 60px auto;
+    }
+
+    .auth-card {
+        background: white;
+        border-radius: 8px;
+        box-shadow: 0 4px 12px rgba(0,0,0,0.15);
+        padding: 40px;
+    }
+
+    .auth-title {
+        text-align: center;
+        font-size: 28px;
+        font-weight: bold;
+        margin-bottom: 30px;
+        color: #6366f1;
+    }
+
+    .auth-link {
+        text-align: center;
+        margin-top: 20px;
+        color: #666;
+    }
+
+    .auth-link a {
+        color: #6366f1;
+        text-decoration: none;
+        font-weight: 500;
+    }
+
+    .auth-link a:hover {
+        text-decoration: underline;
+    }
+</style>
+{% endblock %}
+
+{% block content %}
+<div class="auth-container">
+    <div class="auth-card">
+        <h1 class="auth-title">Login</h1>
+
+        <form method="POST">
+            <div class="form-group">
+                <label for="email">Email</label>
+                <input type="email" id="email" name="email" required>
+            </div>
+
+            <div class="form-group">
+                <label for="password">Password</label>
+                <input type="password" id="password" name="password" required>
+            </div>
+
+            <button type="submit" class="btn btn-primary" style="width: 100%;">Login</button>
+        </form>
+
+        <div class="auth-link">
+            Don't have an account? <a href="{{ url_for('register') }}">Register</a>
+        </div>
+    </div>
+</div>
+{% endblock %}