fix: resolve known issues and improve code standards

- Fix known bugs in user, plan, and server modules
- Standardize code formatting and structure
- Optimize database queries and model relationships
- Improve request validation and error handling
- Update admin controllers for better consistency

app/Http/Requests/Admin/UserUpdate.php

@@ -18,12 +18,12 @@ class UserUpdate extends FormRequest
             'password' => 'nullable|min:8',
             'transfer_enable' => 'numeric',
             'expired_at' => 'nullable|integer',
-            'banned' => 'in:0,1',
+            'banned' => 'bool',
             'plan_id' => 'nullable|integer',
             'commission_rate' => 'nullable|integer|min:0|max:100',
             'discount' => 'nullable|integer|min:0|max:100',
-            'is_admin' => 'required|in:0,1',
-            'is_staff' => 'required|in:0,1',
+            'is_admin' => 'boolean',
+            'is_staff' => 'boolean',
             'u' => 'integer',
             'd' => 'integer',
             'balance' => 'numeric',