refactor(auth): upgrade password hashing to PHP's password_hash

- Replace custom password hashing function with PHP's built-in password_hash
- Update password verification to use password_verify
- Adjust database schema to accommodate new password hash length
- Modify installation and login controllers to use new hashing method

app/admin/controller/Login.php

@@ -53,7 +53,7 @@ class Login extends AdminController
         if (empty($admin)) {
             $this->error('用户不存在');
         }
-        if (password($post['password']) != $admin->password) {
+        if (!password_verify($post['password'], $admin->password)) {
             $this->error('密码输入有误');
         }
         if ($admin->status == 0) {