fix build without custom config

.github/workflows/deploy.yml

@@ -14,6 +14,17 @@ jobs:
     - name: Checkout code
       uses: actions/checkout@v5
 
+    - name: Create custom.config.mjs from secret
+      run: |
+        if [ -n "${{ secrets.CUSTOM_CONFIG }}" ]; then
+          cat > custom.config.mjs << 'EOF'
+          ${{ secrets.CUSTOM_CONFIG }}
+          EOF
+          echo "custom.config.mjs created from secret"
+        else
+          echo "CUSTOM_CONFIG secret not set, skipping custom.config.mjs creation"
+        fi
+
     - name: Setup Node.js
       uses: actions/setup-node@v6
       with:

config-loader.mjs

@@ -101,11 +101,25 @@ const defaultConfig = {
 // Try to load custom config (optional, for forks)
 let customConfig = {};
 try {
-  const customModule = await import('./custom.config.mjs');
-  customConfig = customModule.default || customModule || {};
+  // Check if file exists before importing
+  const fs = await import('node:fs');
+  const path = await import('node:path');
+  const { fileURLToPath, pathToFileURL } = await import('node:url');
+
+  // Get the directory of the current module
+  const __filename = fileURLToPath(import.meta.url);
+  const __dirname = path.dirname(__filename);
+  const customConfigPath = path.join(__dirname, 'custom.config.mjs');
+
+  if (fs.existsSync(customConfigPath)) {
+    // Use dynamic import with file:// URL to prevent static analysis by Vite/Rollup
+    const customConfigUrl = pathToFileURL(customConfigPath).href;
+    const customModule = await import(customConfigUrl);
+    customConfig = customModule.default || customModule || {};
+  }
 } catch (error) {
-  // custom.config.mjs doesn't exist, use defaults only
-  // This is expected for the default repository
+  // custom.config.mjs doesn't exist or couldn't be loaded, use defaults only
+  // This is expected for the default repository or when file is missing
 }
 
 // Deep merge function for nested objects