chore: 初始化仓库（排除 adb 二进制文件以解决推送超时）

templates/admin/login.html

@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+<meta charset="UTF-8">
+<meta name="viewport" content="width=device-width, initial-scale=1.0">
+<title>登录 · 设备自动化后台</title>
+<style>
+*{box-sizing:border-box;margin:0;padding:0}
+body{font-family:-apple-system,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;
+  background:linear-gradient(135deg,#1e293b 0%,#334155 100%);min-height:100vh;
+  display:flex;justify-content:center;align-items:center}
+.box{background:#fff;padding:40px;border-radius:16px;box-shadow:0 20px 60px rgba(0,0,0,.3);width:380px}
+.logo{width:56px;height:56px;background:linear-gradient(135deg,#3b82f6,#2563eb);border-radius:14px;
+  margin:0 auto 20px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:28px;font-weight:700}
+h2{text-align:center;margin:0 0 8px;color:#1e293b;font-size:22px;font-weight:700}
+.sub{text-align:center;color:#64748b;font-size:13px;margin-bottom:28px}
+input{width:100%;padding:12px 14px;margin-bottom:16px;border:1px solid #e2e8f0;border-radius:8px;
+  font-size:14px;transition:all .15s;background:#f8fafc}
+input:focus{outline:none;border-color:#3b82f6;background:#fff;box-shadow:0 0 0 3px rgba(59,130,246,.1)}
+button{width:100%;padding:12px;background:linear-gradient(135deg,#3b82f6,#2563eb);color:#fff;
+  border:none;border-radius:8px;cursor:pointer;font-size:14px;font-weight:600;transition:all .15s}
+button:hover{transform:translateY(-1px);box-shadow:0 4px 12px rgba(59,130,246,.3)}
+.err{color:#ef4444;font-size:13px;margin-bottom:14px;padding:10px 14px;background:#fee2e2;
+  border-radius:8px;border-left:3px solid #ef4444}
+.hint{color:#94a3b8;font-size:12px;margin-top:20px;text-align:center;padding-top:20px;border-top:1px solid #e2e8f0}
+</style>
+</head>
+<body>
+<div class="box">
+  <div class="logo">A</div>
+  <h2>设备自动化后台</h2>
+  <div class="sub">Automation Management System</div>
+  {% if error %}<div class="err">{{ error }}</div>{% endif %}
+  <form method="post">
+    <input name="username" placeholder="用户名" autofocus>
+    <input name="password" type="password" placeholder="密码">
+    <button type="submit">登 录</button>
+  </form>
+  <div class="hint">默认账号 admin / admin123，登录后请及时修改密码</div>
+</div>
+</body>
+</html>