Add contract management and invoice settings pages

- Created a new Blade view for managing brand contracts with forms for adding and editing contracts, including client and category selection.
- Implemented success message notifications for contract actions.
- Added a new Blade view for invoice settings, allowing customization of invoice number format, header branding, and default values for new invoices.
- Introduced a new PDF view for generating rate cards with customizable styles based on user profile settings.
- Developed a profile management page for rate cards, enabling users to update their identity, appearance, and visibility settings.

app/Services/Notifications/WahaNotifier.php

@@ -30,26 +30,33 @@ class WahaNotifier
 
     private function send(NotificationSetting $setting, string $text): void
     {
-        $config  = $setting->config ?? [];
-        $url     = rtrim($config['waha_url'] ?? '', '/');
-        $session = $config['waha_session'] ?? 'default';
-        $phone   = $config['phone'] ?? null;
+        $config   = $setting->config ?? [];
+        $endpoint = $config['waha_endpoint'] ?? null;
+        $session  = $config['waha_session'] ?? 'default';
+        $chatId   = $config['chat_id'] ?? null;
+        $apiKey   = $config['api_key'] ?? null;
 
-        if (! $url || ! $phone) {
-            throw new \RuntimeException('WAHA waha_url and phone are required.');
+        if (! $endpoint || ! $chatId) {
+            throw new \RuntimeException('WAHA waha_endpoint and chat_id are required.');
         }
 
-        // Normalise phone: strip non-digits, ensure no leading +
-        $chatId = preg_replace('/[^0-9]/', '', $phone) . '@c.us';
+        $http = Http::timeout(15)->acceptJson()->contentType('application/json');
 
-        $response = Http::timeout(15)->post("{$url}/api/sendText", [
-            'session' => $session,
+        if ($apiKey) {
+            $http = $http->withHeaders(['X-Api-Key' => $apiKey]);
+        }
+
+        $response = $http->post($endpoint, [
             'chatId'  => $chatId,
             'text'    => $text,
+            'session' => $session,
         ]);
 
         if (! $response->successful()) {
-            throw new \RuntimeException('WAHA API error: ' . $response->body());
+            $keyHint = $apiKey ? '(api_key set, length=' . strlen($apiKey) . ')' : '(no api_key)';
+            throw new \RuntimeException(
+                "WAHA API error {$response->status()} {$keyHint} → " . $response->body()
+            );
         }
     }
 }