Move app from /opt to /var/www/payfrit-api (standard Linux web dir)

- Moved directory on both dev and biz servers
- Updated nginx configs on both servers
- Added appRoot() helper, uploadsRoot() uses it
- No more hardcoded /opt/payfrit-api paths in codebase

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

api/helpers.php

@@ -191,8 +191,12 @@ function baseUrl(): string {
     return isDev() ? 'https://dev.payfrit.com' : 'https://biz.payfrit.com';
 }
 
+function appRoot(): string {
+    return '/var/www/payfrit-api';
+}
+
 function uploadsRoot(): string {
-    return '/opt/payfrit-api/uploads';
+    return appRoot() . '/uploads';
 }
 
 // ============================================

api/setup/analyzeMenuUrl.php

@@ -628,11 +628,10 @@ JSEOF;
 
     // Helper: expand a URL path to a local file path
     $expandPath = function(string $urlPath): string {
-        // /uploads/items/123.jpg → /opt/payfrit-api/uploads/items/123.jpg
         if (str_starts_with($urlPath, '/uploads/')) {
             return uploadsRoot() . substr($urlPath, 8);
         }
-        return '/opt/payfrit-api' . $urlPath;
+        return appRoot() . $urlPath;
     };
 
     // Helper: convert 24h time to 12h format string

api/setup/saveWizard.php

@@ -688,7 +688,7 @@ try {
     // Clean up temp folder from ZIP upload
     $tempFolder = is_string($data['tempFolder'] ?? null) ? trim($data['tempFolder']) : '';
     if (strlen($tempFolder) && preg_match('/^[a-f0-9]{32}$/', $tempFolder)) {
-        $tempFolderPath = "/opt/payfrit-api/temp/menu-import/$tempFolder";
+        $tempFolderPath = appRoot() . "/temp/menu-import/$tempFolder";
         if (is_dir($tempFolderPath)) {
             exec("rm -rf " . escapeshellarg($tempFolderPath));
             $response['steps'][] = "Cleaned up temp folder: $tempFolder";

api/setup/uploadSavedPage.php

@@ -12,7 +12,7 @@ runAuth();
 $response = ['OK' => false, 'MESSAGE' => '', 'URL' => ''];
 
 try {
-    $tempBaseDir = "/opt/payfrit-api/temp/menu-import";
+    $tempBaseDir = appRoot() . "/temp/menu-import";
 
     // Create temp directory if needed
     if (!is_dir($tempBaseDir)) {