feat: enhance agent management and validation logic

- Updated AGENTS.md to clarify agent account restrictions and permissions.
- Implemented checks in AgentNodeAdminUserStoreController and AgentNodeRoleStoreController to restrict admin user and role creation to the agent's own node.
- Enhanced validation in AdminPlayerStoreController and AdminPlayerUpdateController to enforce credit limit and rebate rate rules based on player funding mode.
- Refactored various request classes to utilize shared admin account field rules for consistency.
- Improved error handling in services related to credit allocation and rebate limits to ensure proper validation and messaging.

app/Http/Requests/Admin/AdminAgentLineStoreRequest.php

@@ -2,6 +2,7 @@
 
 namespace App\Http\Requests\Admin;
 
+use App\Http\Requests\Admin\Concerns\AdminAccountFieldRules;
 use App\Http\Requests\Admin\Concerns\AgentProfileFieldRules;
 use App\Http\Requests\ApiFormRequest;
 use App\Models\AdminSite;
@@ -11,6 +12,7 @@ use Illuminate\Validation\Validator;
 
 final class AdminAgentLineStoreRequest extends ApiFormRequest
 {
+    use AdminAccountFieldRules;
     use AgentProfileFieldRules;
 
     public function authorize(): bool
@@ -20,6 +22,7 @@ final class AdminAgentLineStoreRequest extends ApiFormRequest
 
     protected function prepareForValidation(): void
     {
+        $this->normalizeAdminAccountFields();
         $this->prepareAgentProfileFieldsForValidation();
 
         if ($this->has('site_code')) {
@@ -42,8 +45,8 @@ final class AdminAgentLineStoreRequest extends ApiFormRequest
             'site_code' => ['required', 'string', 'max:64', 'regex:/^[a-z0-9][a-z0-9_-]*$/', Rule::exists('admin_sites', 'code')],
             'code' => ['sometimes', 'nullable', 'string', 'max:64', 'regex:/^[a-z0-9][a-z0-9_-]*$/', Rule::unique('agent_nodes', 'code')],
             'name' => ['required', 'string', 'max:128'],
-            'username' => ['required', 'string', 'max:64', Rule::unique('admin_users', 'username')],
-            'password' => ['required', 'string', 'min:8', 'max:128'],
+            'username' => [...$this->adminOperatorUsernameRules(), Rule::unique('admin_users', 'username')],
+            'password' => $this->adminLoginPasswordRules(),
             'email' => ['nullable', 'string', 'email', 'max:255', Rule::unique('admin_users', 'email')],
             'status' => ['sometimes', 'integer', 'in:0,1'],
             ...$this->agentProfileFieldRules(),