fix: Remove hardcoded dev mode filters from woonoow.php

🐛 CRITICAL FIX - Root Cause Found!
The plugin had hardcoded dev mode filters that forced EVERYONE into dev mode:
- add_filter('woonoow/admin_is_dev', '__return_true');
- add_filter('woonoow/admin_dev_server', fn() => 'https://woonoow.local:5173');

This caused:
- ✗ SPA trying to load from localhost:5173
- ✗ Loading @react-refresh and main.tsx (dev files)
- ✗ Not loading app.js and app.css (production files)

✅ Solution:
- Removed hardcoded filters from woonoow.php
- Commented them out with instructions
- Added debug logging to is_dev_mode()
- Updated installation checker to detect this issue

📝 For Developers:
If you need dev mode, add to wp-config.php:
define('WOONOOW_ADMIN_DEV', true);

Or use filter in your development plugin:
add_filter('woonoow/admin_is_dev', '__return_true');

🎯 Result:
- Production mode by default (no config needed)
- Dev mode only when explicitly enabled
- Better UX - plugin works out of the box

includes/Admin/Assets.php

@@ -238,8 +238,18 @@ class Assets {
         /**
          * Filter: force dev/prod mode for WooNooW admin assets.
          * Return true to use Vite dev server, false to use built assets.
+         * 
+         * IMPORTANT: This filter should NOT be used in production!
+         * Only use it during development.
          */
-        return (bool) apply_filters('woonoow/admin_is_dev', $const_dev);
+        $filtered = apply_filters('woonoow/admin_is_dev', $const_dev);
+        
+        // Debug logging (only if WP_DEBUG is enabled)
+        if (defined('WP_DEBUG') && WP_DEBUG && $filtered !== $const_dev) {
+            error_log('[WooNooW Assets] Dev mode changed by filter: ' . ($filtered ? 'true' : 'false'));
+        }
+        
+        return (bool) $filtered;
     }
 
     /** Dev server URL (filterable) */