chore: improve code quality - PHPStan level 5, add #[\Override] attributes, fix return types

app/Models/EmailTemplate.php

@@ -6,8 +6,10 @@ use Illuminate\Database\Eloquent\Model;
 
 class EmailTemplate extends Model
 {
+    #[\Override]
     protected $table = 'email_templates';
 
+    #[\Override]
     protected $fillable = [
         'name',
         'subject',
@@ -16,6 +18,7 @@ class EmailTemplate extends Model
         'is_active',
     ];
 
+    #[\Override]
     protected $casts = [
         'is_active' => 'boolean',
     ];

app/Models/SocialAccount.php

@@ -7,8 +7,10 @@ use Illuminate\Database\Eloquent\Relations\BelongsTo;
 
 class SocialAccount extends Model
 {
+    #[\Override]
     protected $table = 'social_accounts';
 
+    #[\Override]
     protected $fillable = [
         'user_id',
         'provider',

app/Models/StaffActivity.php

@@ -7,8 +7,10 @@ use Illuminate\Database\Eloquent\Relations\BelongsTo;
 
 class StaffActivity extends Model
 {
+    #[\Override]
     protected $table = 'staff_activities';
 
+    #[\Override]
     protected $fillable = [
         'user_id',
         'action',
@@ -19,6 +21,7 @@ class StaffActivity extends Model
         'metadata',
     ];
 
+    #[\Override]
     protected $casts = [
         'metadata' => 'array',
         'created_at' => 'datetime',