diff --git a/app/Models/Company.php b/app/Models/Company.php
index 4c748195..382cbe9b 100644
--- a/app/Models/Company.php
+++ b/app/Models/Company.php
@@ -152,7 +152,11 @@ class Company extends Model implements HasMedia
         return $this->belongsToMany(User::class, 'user_company', 'company_id', 'user_id');
     }
 
-    public function hasTransactions()
+    /**
+     * Check whether the company has any business data such as customers,
+     * items, invoices, estimates, expenses, payments, or recurring invoices.
+     */
+    public function hasTransactions(): bool
     {
         if (
             $this->customers()->exists() ||
diff --git a/app/Models/CompanySetting.php b/app/Models/CompanySetting.php
index 459e4bc5..5f96676f 100644
--- a/app/Models/CompanySetting.php
+++ b/app/Models/CompanySetting.php
@@ -5,6 +5,7 @@ namespace App\Models;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Support\Collection;
 
 class CompanySetting extends Model
 {
@@ -22,7 +23,10 @@ class CompanySetting extends Model
         $query->where('company_id', $company_id);
     }
 
-    public static function setSettings($settings, $company_id)
+    /**
+     * Bulk create or update settings for a specific company.
+     */
+    public static function setSettings(array $settings, mixed $company_id): void
     {
         foreach ($settings as $key => $value) {
             self::updateOrCreate(
@@ -39,14 +43,20 @@ class CompanySetting extends Model
         }
     }
 
-    public static function getAllSettings($company_id)
+    /**
+     * Retrieve all settings for a company as a key-value collection.
+     */
+    public static function getAllSettings(mixed $company_id): Collection
     {
         return static::whereCompany($company_id)->get()->mapWithKeys(function ($item) {
             return [$item['option'] => $item['value']];
         });
     }
 
-    public static function getSettings($settings, $company_id)
+    /**
+     * Retrieve specific settings for a company as a key-value collection.
+     */
+    public static function getSettings(array $settings, mixed $company_id): Collection
     {
         return static::whereIn('option', $settings)->whereCompany($company_id)
             ->get()->mapWithKeys(function ($item) {
@@ -54,7 +64,10 @@ class CompanySetting extends Model
             });
     }
 
-    public static function getSetting($key, $company_id)
+    /**
+     * Retrieve a single company setting value by key, or null if not found.
+     */
+    public static function getSetting(string $key, mixed $company_id): mixed
     {
         $setting = static::whereOption($key)->whereCompany($company_id)->first();
 
diff --git a/app/Models/CustomField.php b/app/Models/CustomField.php
index 454e8c7e..2e0e2fd2 100644
--- a/app/Models/CustomField.php
+++ b/app/Models/CustomField.php
@@ -31,14 +31,14 @@ class CustomField extends Model
         ];
     }
 
-    public function setTimeAnswerAttribute($value)
+    public function setTimeAnswerAttribute(mixed $value): void
     {
         if ($value && $value != null) {
             $this->attributes['time_answer'] = date('H:i:s', strtotime($value));
         }
     }
 
-    public function setOptionsAttribute($value)
+    public function setOptionsAttribute(mixed $value): void
     {
         $this->attributes['options'] = json_encode($value);
     }
diff --git a/app/Models/CustomFieldValue.php b/app/Models/CustomFieldValue.php
index f3f39f1c..0895470f 100644
--- a/app/Models/CustomFieldValue.php
+++ b/app/Models/CustomFieldValue.php
@@ -24,7 +24,7 @@ class CustomFieldValue extends Model
         'defaultAnswer',
     ];
 
-    public function setTimeAnswerAttribute($value)
+    public function setTimeAnswerAttribute(mixed $value): void
     {
         if ($value && $value != null) {
             $this->attributes['time_answer'] = date('H:i:s', strtotime($value));
diff --git a/app/Models/Customer.php b/app/Models/Customer.php
index 50df2a05..349a688e 100644
--- a/app/Models/Customer.php
+++ b/app/Models/Customer.php
@@ -119,7 +119,7 @@ class Customer extends Authenticatable implements HasMedia
         return $this->hasOne(Address::class)->where('type', Address::SHIPPING_TYPE);
     }
 
-    public function sendPasswordResetNotification($token)
+    public function sendPasswordResetNotification(mixed $token): void
     {
         $this->notify(new CustomerMailResetPasswordNotification($token));
     }
diff --git a/app/Models/EmailLog.php b/app/Models/EmailLog.php
index 4a456013..e0aef939 100644
--- a/app/Models/EmailLog.php
+++ b/app/Models/EmailLog.php
@@ -18,7 +18,11 @@ class EmailLog extends Model
         return $this->morphTo();
     }
 
-    public function isExpired()
+    /**
+     * Check if the email log's public link has expired based on the owning
+     * company's link expiry settings (link_expiry_days and automatically_expire_public_links).
+     */
+    public function isExpired(): bool
     {
         $linkExpiryDays = (int) CompanySetting::getSetting('link_expiry_days', $this->mailable()->get()->toArray()[0]['company_id']);
         $checkExpiryLinks = CompanySetting::getSetting('automatically_expire_public_links', $this->mailable()->get()->toArray()[0]['company_id']);
diff --git a/app/Models/Estimate.php b/app/Models/Estimate.php
index a0a78965..6702e110 100644
--- a/app/Models/Estimate.php
+++ b/app/Models/Estimate.php
@@ -213,12 +213,12 @@ class Estimate extends Model implements HasMedia
         return $query->paginate($limit);
     }
 
-    public function getPDFData()
+    public function getPDFData(): mixed
     {
         return app(EstimateService::class)->getPdfData($this);
     }
 
-    public function getCompanyAddress()
+    public function getCompanyAddress(): string|false
     {
         if ($this->company && (! $this->company->address()->exists())) {
             return false;
@@ -229,7 +229,7 @@ class Estimate extends Model implements HasMedia
         return $this->getFormattedString($format);
     }
 
-    public function getCustomerShippingAddress()
+    public function getCustomerShippingAddress(): string|false
     {
         if ($this->customer && (! $this->customer->shippingAddress()->exists())) {
             return false;
@@ -240,7 +240,7 @@ class Estimate extends Model implements HasMedia
         return $this->getFormattedString($format);
     }
 
-    public function getCustomerBillingAddress()
+    public function getCustomerBillingAddress(): string|false
     {
         if ($this->customer && (! $this->customer->billingAddress()->exists())) {
             return false;
@@ -251,12 +251,12 @@ class Estimate extends Model implements HasMedia
         return $this->getFormattedString($format);
     }
 
-    public function getNotes()
+    public function getNotes(): string
     {
         return PdfHtmlSanitizer::sanitize($this->getFormattedString($this->notes));
     }
 
-    public function getEmailAttachmentSetting()
+    public function getEmailAttachmentSetting(): bool
     {
         $estimateAsAttachment = CompanySetting::getSetting('estimate_email_attachment', $this->company_id);
 
@@ -267,7 +267,7 @@ class Estimate extends Model implements HasMedia
         return true;
     }
 
-    public function getEmailBody($body)
+    public function getEmailBody(string $body): string
     {
         $values = array_merge($this->getFieldsArray(), $this->getExtraFields());
 
@@ -276,7 +276,7 @@ class Estimate extends Model implements HasMedia
         return preg_replace('/{(.*?)}/', '', $body);
     }
 
-    public function getExtraFields()
+    public function getExtraFields(): array
     {
         return [
             '{ESTIMATE_DATE}' => $this->formattedEstimateDate,
@@ -286,7 +286,12 @@ class Estimate extends Model implements HasMedia
         ];
     }
 
-    public function getInvoiceTemplateName()
+    /**
+     * Map the estimate's template name to the corresponding invoice template name.
+     *
+     * Falls back to 'invoice1' if the mapped name does not exist in available templates.
+     */
+    public function getInvoiceTemplateName(): string
     {
         $templateName = Str::replace('estimate', 'invoice', $this->template_name);
 
@@ -303,7 +308,13 @@ class Estimate extends Model implements HasMedia
         return $templateName;
     }
 
-    public function checkForEstimateConvertAction()
+    /**
+     * Handle the post-conversion action for this estimate based on company settings.
+     *
+     * Either deletes the estimate or marks it as accepted, depending on the
+     * 'estimate_convert_action' company setting.
+     */
+    public function checkForEstimateConvertAction(): bool
     {
         $convertEstimateAction = CompanySetting::getSetting(
             'estimate_convert_action',
diff --git a/app/Models/ExchangeRateLog.php b/app/Models/ExchangeRateLog.php
index e716037b..c7584526 100644
--- a/app/Models/ExchangeRateLog.php
+++ b/app/Models/ExchangeRateLog.php
@@ -31,7 +31,11 @@ class ExchangeRateLog extends Model
         return $this->belongsTo(Company::class);
     }
 
-    public static function addExchangeRateLog($model)
+    /**
+     * Create an exchange rate log entry from a document model (invoice, estimate, etc.)
+     * using its exchange rate, currency, and the company's default currency setting.
+     */
+    public static function addExchangeRateLog(mixed $model): self
     {
         $data = [
             'exchange_rate' => $model->exchange_rate,
diff --git a/app/Models/FileDisk.php b/app/Models/FileDisk.php
index 5d933b5f..0a8fca72 100644
--- a/app/Models/FileDisk.php
+++ b/app/Models/FileDisk.php
@@ -5,6 +5,7 @@ namespace App\Models;
 use Carbon\Carbon;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
+use Illuminate\Support\Collection;
 
 class FileDisk extends Model
 {
@@ -25,7 +26,7 @@ class FileDisk extends Model
         ];
     }
 
-    public function setCredentialsAttribute($value)
+    public function setCredentialsAttribute(mixed $value): void
     {
         $this->attributes['credentials'] = json_encode($value);
     }
@@ -80,7 +81,10 @@ class FileDisk extends Model
         }
     }
 
-    public function setConfig()
+    /**
+     * Apply this disk's credentials to the filesystem configuration at runtime.
+     */
+    public function setConfig(): void
     {
         $driver = $this->driver;
 
@@ -89,12 +93,18 @@ class FileDisk extends Model
         self::setFilesystem($credentials, $driver);
     }
 
-    public function setAsDefault()
+    /**
+     * Determine whether this disk is configured as the default storage disk.
+     */
+    public function setAsDefault(): bool
     {
         return $this->set_as_default;
     }
 
-    public static function setFilesystem($credentials, $driver)
+    /**
+     * Register a dynamic filesystem disk in the runtime configuration using the given credentials.
+     */
+    public static function setFilesystem(Collection $credentials, string $driver): void
     {
         $prefix = env('DYNAMIC_DISK_PREFIX', 'temp_');
 
@@ -111,12 +121,12 @@ class FileDisk extends Model
         config(['filesystems.disks.'.$prefix.$driver => $disks]);
     }
 
-    public function isSystem()
+    public function isSystem(): bool
     {
         return $this->type === self::DISK_TYPE_SYSTEM;
     }
 
-    public function isRemote()
+    public function isRemote(): bool
     {
         return $this->type === self::DISK_TYPE_REMOTE;
     }
diff --git a/app/Models/Invoice.php b/app/Models/Invoice.php
index 9c35a0c5..35f22c4b 100644
--- a/app/Models/Invoice.php
+++ b/app/Models/Invoice.php
@@ -157,7 +157,7 @@ class Invoice extends Model implements HasMedia
         return $allowed;
     }
 
-    public function getPreviousStatus()
+    public function getPreviousStatus(): string
     {
         if ($this->viewed) {
             return self::STATUS_VIEWED;
@@ -319,12 +319,12 @@ class Invoice extends Model implements HasMedia
         return $query->paginate($limit);
     }
 
-    public function getPDFData()
+    public function getPDFData(): mixed
     {
         return app(InvoiceService::class)->getPdfData($this);
     }
 
-    public function getEmailAttachmentSetting()
+    public function getEmailAttachmentSetting(): bool
     {
         $invoiceAsAttachment = CompanySetting::getSetting('invoice_email_attachment', $this->company_id);
 
@@ -335,7 +335,7 @@ class Invoice extends Model implements HasMedia
         return true;
     }
 
-    public function getCompanyAddress()
+    public function getCompanyAddress(): string|false
     {
         if ($this->company && (! $this->company->address()->exists())) {
             return false;
@@ -346,7 +346,7 @@ class Invoice extends Model implements HasMedia
         return $this->getFormattedString($format);
     }
 
-    public function getCustomerShippingAddress()
+    public function getCustomerShippingAddress(): string|false
     {
         if ($this->customer && (! $this->customer->shippingAddress()->exists())) {
             return false;
@@ -357,7 +357,7 @@ class Invoice extends Model implements HasMedia
         return $this->getFormattedString($format);
     }
 
-    public function getCustomerBillingAddress()
+    public function getCustomerBillingAddress(): string|false
     {
         if ($this->customer && (! $this->customer->billingAddress()->exists())) {
             return false;
@@ -368,12 +368,12 @@ class Invoice extends Model implements HasMedia
         return $this->getFormattedString($format);
     }
 
-    public function getNotes()
+    public function getNotes(): string
     {
         return PdfHtmlSanitizer::sanitize($this->getFormattedString($this->notes));
     }
 
-    public function getEmailString($body)
+    public function getEmailString(string $body): string
     {
         $values = array_merge($this->getFieldsArray(), $this->getExtraFields());
 
@@ -382,7 +382,7 @@ class Invoice extends Model implements HasMedia
         return preg_replace('/{(.*?)}/', '', $body);
     }
 
-    public function getExtraFields()
+    public function getExtraFields(): array
     {
         return [
             '{INVOICE_DATE}' => $this->formattedInvoiceDate,
@@ -392,7 +392,10 @@ class Invoice extends Model implements HasMedia
         ];
     }
 
-    public function addInvoicePayment($amount)
+    /**
+     * Add an amount to the invoice's due balance and recalculate the paid status.
+     */
+    public function addInvoicePayment(int $amount): void
     {
         $this->due_amount += $amount;
         $this->base_due_amount = $this->due_amount * $this->exchange_rate;
@@ -400,7 +403,10 @@ class Invoice extends Model implements HasMedia
         $this->changeInvoiceStatus($this->due_amount);
     }
 
-    public function subtractInvoicePayment($amount)
+    /**
+     * Subtract an amount from the invoice's due balance and recalculate the paid status.
+     */
+    public function subtractInvoicePayment(int $amount): void
     {
         $this->due_amount -= $amount;
         $this->base_due_amount = $this->due_amount * $this->exchange_rate;
@@ -409,11 +415,12 @@ class Invoice extends Model implements HasMedia
     }
 
     /**
-     * Set the invoice status from amount.
+     * Determine the invoice status and paid_status based on the remaining due amount.
      *
-     * @return array
+     * Returns an empty array for negative amounts, marks as paid when zero,
+     * unpaid when equal to total, or partially paid otherwise.
      */
-    public function getInvoiceStatusByAmount($amount)
+    public function getInvoiceStatusByAmount(int $amount): array
     {
         if ($amount < 0) {
             return [];
@@ -441,11 +448,9 @@ class Invoice extends Model implements HasMedia
     }
 
     /**
-     * Changes the invoice status right away
-     *
-     * @return string[]|void
+     * Persist the invoice status change immediately based on the given due amount.
      */
-    public function changeInvoiceStatus($amount)
+    public function changeInvoiceStatus(int $amount): void
     {
         $status = $this->getInvoiceStatusByAmount($amount);
         if (! empty($status)) {
diff --git a/app/Models/Payment.php b/app/Models/Payment.php
index b836419b..139d80bd 100644
--- a/app/Models/Payment.php
+++ b/app/Models/Payment.php
@@ -212,12 +212,12 @@ class Payment extends Model implements HasMedia
         $query->where('payments.customer_id', $customer_id);
     }
 
-    public function getPDFData()
+    public function getPDFData(): mixed
     {
         return app(PaymentService::class)->getPdfData($this);
     }
 
-    public function getCompanyAddress()
+    public function getCompanyAddress(): string|false
     {
         if ($this->company && (! $this->company->address()->exists())) {
             return false;
@@ -228,7 +228,7 @@ class Payment extends Model implements HasMedia
         return $this->getFormattedString($format);
     }
 
-    public function getCustomerBillingAddress()
+    public function getCustomerBillingAddress(): string|false
     {
         if ($this->customer && (! $this->customer->billingAddress()->exists())) {
             return false;
@@ -239,7 +239,7 @@ class Payment extends Model implements HasMedia
         return $this->getFormattedString($format);
     }
 
-    public function getEmailAttachmentSetting()
+    public function getEmailAttachmentSetting(): bool
     {
         $paymentAsAttachment = CompanySetting::getSetting('payment_email_attachment', $this->company_id);
 
@@ -250,12 +250,12 @@ class Payment extends Model implements HasMedia
         return true;
     }
 
-    public function getNotes()
+    public function getNotes(): string
     {
         return PdfHtmlSanitizer::sanitize($this->getFormattedString($this->notes));
     }
 
-    public function getEmailBody($body)
+    public function getEmailBody(string $body): string
     {
         $values = array_merge($this->getFieldsArray(), $this->getExtraFields());
 
@@ -264,7 +264,7 @@ class Payment extends Model implements HasMedia
         return preg_replace('/{(.*?)}/', '', $body);
     }
 
-    public function getExtraFields()
+    public function getExtraFields(): array
     {
         return [
             '{PAYMENT_DATE}' => $this->formattedPaymentDate,
diff --git a/app/Models/PaymentMethod.php b/app/Models/PaymentMethod.php
index ab3a8a3c..ebceb50c 100644
--- a/app/Models/PaymentMethod.php
+++ b/app/Models/PaymentMethod.php
@@ -93,7 +93,10 @@ class PaymentMethod extends Model
         return $query->paginate($limit);
     }
 
-    public static function createPaymentMethod($request)
+    /**
+     * Create a new payment method from a validated form request.
+     */
+    public static function createPaymentMethod(mixed $request): self
     {
         $data = $request->getPaymentMethodPayload();
 
@@ -102,7 +105,10 @@ class PaymentMethod extends Model
         return $paymentMethod;
     }
 
-    public static function getSettings($id)
+    /**
+     * Retrieve the settings array for a payment method by its ID.
+     */
+    public static function getSettings(int $id): mixed
     {
         $settings = PaymentMethod::find($id)
             ->settings;
diff --git a/app/Models/RecurringInvoice.php b/app/Models/RecurringInvoice.php
index 1affb3a5..a42ed365 100644
--- a/app/Models/RecurringInvoice.php
+++ b/app/Models/RecurringInvoice.php
@@ -190,7 +190,7 @@ class RecurringInvoice extends Model
         }
     }
 
-    public function markStatusAsCompleted()
+    public function markStatusAsCompleted(): void
     {
         if ($this->status == $this->status) {
             $this->status = self::COMPLETED;
@@ -198,14 +198,14 @@ class RecurringInvoice extends Model
         }
     }
 
-    public static function getNextInvoiceDate($frequency, $starts_at)
+    public static function getNextInvoiceDate(string $frequency, string $starts_at): string
     {
         $cron = new Cron\CronExpression($frequency);
 
         return $cron->getNextRunDate($starts_at)->format('Y-m-d H:i:s');
     }
 
-    public function updateNextInvoiceDate()
+    public function updateNextInvoiceDate(): void
     {
         $nextInvoiceAt = self::getNextInvoiceDate($this->frequency, $this->starts_at);
 
diff --git a/app/Models/Setting.php b/app/Models/Setting.php
index 203b0c56..f5581428 100644
--- a/app/Models/Setting.php
+++ b/app/Models/Setting.php
@@ -4,6 +4,7 @@ namespace App\Models;
 
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
+use Illuminate\Support\Collection;
 
 class Setting extends Model
 {
@@ -11,7 +12,10 @@ class Setting extends Model
 
     protected $fillable = ['option', 'value'];
 
-    public static function setSetting($key, $setting)
+    /**
+     * Create or update a single application setting by key.
+     */
+    public static function setSetting(string $key, mixed $setting): void
     {
         $old = self::whereOption($key)->first();
 
@@ -28,7 +32,10 @@ class Setting extends Model
         $set->save();
     }
 
-    public static function setSettings($settings)
+    /**
+     * Bulk create or update application settings from a key-value array.
+     */
+    public static function setSettings(array $settings): void
     {
         foreach ($settings as $key => $value) {
             self::updateOrCreate(
@@ -43,7 +50,10 @@ class Setting extends Model
         }
     }
 
-    public static function getSetting($key)
+    /**
+     * Retrieve a single setting value by key, or null if not found.
+     */
+    public static function getSetting(string $key): mixed
     {
         $setting = static::whereOption($key)->first();
 
@@ -54,7 +64,10 @@ class Setting extends Model
         }
     }
 
-    public static function getSettings($settings)
+    /**
+     * Retrieve multiple settings as a key-value collection.
+     */
+    public static function getSettings(array $settings): Collection
     {
         return static::whereIn('option', $settings)
             ->get()->mapWithKeys(function ($item) {
diff --git a/app/Models/Transaction.php b/app/Models/Transaction.php
index 7ec5ac9d..0ddccdcf 100644
--- a/app/Models/Transaction.php
+++ b/app/Models/Transaction.php
@@ -39,7 +39,11 @@ class Transaction extends Model
         return $this->belongsTo(Company::class);
     }
 
-    public function isExpired()
+    /**
+     * Check if a completed transaction's public link has expired based on the
+     * company's link expiry settings (link_expiry_days and automatically_expire_public_links).
+     */
+    public function isExpired(): bool
     {
         $linkExpiryDays = (int) CompanySetting::getSetting('link_expiry_days', $this->company_id);
         $checkExpiryLinks = CompanySetting::getSetting('automatically_expire_public_links', $this->company_id);
diff --git a/app/Models/User.php b/app/Models/User.php
index a6d9384a..12ec0b30 100644
--- a/app/Models/User.php
+++ b/app/Models/User.php
@@ -12,6 +12,7 @@ use Illuminate\Database\Eloquent\Relations\HasMany;
 use Illuminate\Database\Eloquent\Relations\HasOne;
 use Illuminate\Foundation\Auth\User as Authenticatable;
 use Illuminate\Notifications\Notifiable;
+use Illuminate\Support\Collection;
 use Illuminate\Support\Facades\Schema;
 use Laravel\Sanctum\HasApiTokens;
 use Silber\Bouncer\Database\HasRolesAndAbilities;
@@ -57,16 +58,13 @@ class User extends Authenticatable implements HasMedia
 
     /**
      * Find the user instance for the given username.
-     *
-     * @param  string  $username
-     * @return \App\User
      */
-    public function findForPassport($username)
+    public function findForPassport(string $username): ?self
     {
         return $this->where('email', $username)->first();
     }
 
-    public function setPasswordAttribute($value)
+    public function setPasswordAttribute(string $value): void
     {
         if ($value != null) {
             $this->attributes['password'] = bcrypt($value);
@@ -78,12 +76,12 @@ class User extends Authenticatable implements HasMedia
         return $this->role === 'super admin';
     }
 
-    public function isSuperAdminOrAdmin()
+    public function isSuperAdminOrAdmin(): bool
     {
         return ($this->role == 'super admin') || ($this->role == 'admin');
     }
 
-    public static function login($request)
+    public static function login(object $request): bool
     {
         $remember = $request->remember;
         $email = $request->email;
@@ -296,7 +294,10 @@ class User extends Authenticatable implements HasMedia
         return 0;
     }
 
-    public function setSettings($settings)
+    /**
+     * Bulk upsert user settings, creating or updating each key-value pair.
+     */
+    public function setSettings(array $settings): void
     {
         foreach ($settings as $key => $value) {
             $this->settings()->updateOrCreate(
@@ -311,28 +312,31 @@ class User extends Authenticatable implements HasMedia
         }
     }
 
-    public function hasCompany($company_id)
+    public function hasCompany(int $company_id): bool
     {
         $companies = $this->companies()->pluck('company_id')->toArray();
 
         return in_array($company_id, $companies);
     }
 
-    public function getAllSettings()
+    public function getAllSettings(): Collection
     {
         return $this->settings()->get()->mapWithKeys(function ($item) {
             return [$item['key'] => $item['value']];
         });
     }
 
-    public function getSettings($settings)
+    public function getSettings(array $settings): Collection
     {
         return $this->settings()->whereIn('key', $settings)->get()->mapWithKeys(function ($item) {
             return [$item['key'] => $item['value']];
         });
     }
 
-    public function isOwner()
+    /**
+     * Determine whether the user is the owner of the current company.
+     */
+    public function isOwner(): bool
     {
         if (Schema::hasColumn('companies', 'owner_id')) {
             $company = Company::find(request()->header('company'));
@@ -347,7 +351,11 @@ class User extends Authenticatable implements HasMedia
         return false;
     }
 
-    public function checkAccess($data)
+    /**
+     * Check whether the user has the required permissions based on ability data,
+     * considering super-admin status, company ownership, and Bouncer abilities.
+     */
+    public function checkAccess(object $data): bool
     {
         if (! empty($data->data['super_admin_only']) && $data->data['super_admin_only']) {
             return $this->isSuperAdmin();