Fix API connectivity and import filament data from PDF

- Update all environment files to use new PostgreSQL API endpoint
- Fix CORS configuration in API server
- Import 35 filaments and 29 colors from PDF data
- Fix TypeScript type error in dashboard
- Add back emoji icons for dark mode toggle
- Remove debugging code and test buttons
- Clean up error handling

app/upadaj/dashboard/page.tsx

@@ -2,9 +2,9 @@
 
 import { useState, useEffect } from 'react';
 import { useRouter } from 'next/navigation';
-import { filamentService, colorService } from '../../../src/services/api';
-import { Filament } from '../../../src/types/filament';
-import '../../../src/styles/select.css';
+import { filamentService, colorService } from '@/src/services/api';
+import { Filament } from '@/src/types/filament';
+import '@/src/styles/select.css';
 
 interface FilamentWithId extends Filament {
   id: string;
@@ -188,7 +188,7 @@ export default function AdminDashboard() {
                       className="px-4 py-2 bg-gray-200 dark:bg-gray-700 text-gray-800 dark:text-gray-200 rounded hover:bg-gray-300 dark:hover:bg-gray-600 transition-colors"
                       title={darkMode ? 'Svetla tema' : 'Tamna tema'}
                     >
-                      {darkMode ? 'Svetla' : 'Tamna'}
+                      {darkMode ? '☀️' : '🌙'}
                     </button>
                   )}
                   <button
@@ -502,7 +502,7 @@ function FilamentForm({
               name="bojaHex"
               value={formData.bojaHex || '#000000'}
               onChange={handleChange}
-              disabled={formData.boja && formData.boja !== 'custom' && availableColors.some(c => c.name === formData.boja)}
+              disabled={!!(formData.boja && formData.boja !== 'custom' && availableColors.some(c => c.name === formData.boja))}
               className="w-full h-10 px-1 py-1 border border-gray-300 dark:border-gray-600 rounded-md bg-white dark:bg-gray-700 cursor-pointer disabled:opacity-50 disabled:cursor-not-allowed"
             />
             {formData.bojaHex && (