v0.2.7: 修复Redis连接 + 启动管理后台

- 修复Redis认证 (配置密码)
- 启动Python管理后台 (端口9531, 15个功能开关)
- 统一版本号 0.2.7
- 更新docker-compose.yml (镜像版本/Redis URL/Admin服务)

source_clean/frontend/admin/js/admin-login.js

@@ -0,0 +1,14 @@
+function page_login(c){
+  c.innerHTML = '<div style="max-width:400px;margin:60px auto"><div class="card"><div class="card-title">管理后台登录</div>'+
+    '<div class="form-group"><label>密码</label><input id="pwd" class="form-control" type="password" onkeydown="if(event.key===\'Enter\')doLogin()"></div>'+
+    '<button class="btn btn-pri" onclick="doLogin()">登录</button></div></div>';
+}
+
+function doLogin(){
+  var pwd = document.getElementById('pwd').value;
+  api('/api/admin/login', {method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify({password:pwd})})
+    .then(function(d){
+      if(d.token){ localStorage.setItem('admin_token', d.token); TOKEN = d.token; nav('dashboard'); }
+      else{ toast(d.error||'密码错误','error'); }
+    });
+}