Hide filaments with zero inventory from table

- Added filter to exclude filaments with kolicina === 0
- Updated filter options to only show values from filaments with inventory
- This removes clutter and makes the table show only available products

🤖 Generated with [Claude Code](https://claude.ai/code)

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

src/components/FilamentTableV2.tsx

@@ -38,16 +38,24 @@ const FilamentTableV2: React.FC<FilamentTableV2Props> = ({ filaments }) => {
     return filaments;
   }, [filaments]);
 
-  // Get unique values for filters
-  const uniqueValues = useMemo(() => ({
-    materials: [...new Set(normalizedFilaments.map(f => f.tip))].sort(),
-    finishes: [...new Set(normalizedFilaments.map(f => f.finish))].sort(),
-    colors: availableColors ? availableColors.map(c => c.name) : [...new Set(normalizedFilaments.map(f => f.boja))].sort()
-  }), [normalizedFilaments, availableColors]);
+  // Get unique values for filters (only from filaments with inventory)
+  const uniqueValues = useMemo(() => {
+    const filamentsWithInventory = normalizedFilaments.filter(f => f.kolicina > 0);
+    return {
+      materials: [...new Set(filamentsWithInventory.map(f => f.tip))].sort(),
+      finishes: [...new Set(filamentsWithInventory.map(f => f.finish))].sort(),
+      colors: [...new Set(filamentsWithInventory.map(f => f.boja))].sort()
+    };
+  }, [normalizedFilaments]);
 
   // Filter and sort filaments
   const filteredAndSortedFilaments = useMemo(() => {
     let filtered = normalizedFilaments.filter(filament => {
+      // First, filter out filaments with zero inventory
+      if (filament.kolicina === 0) {
+        return false;
+      }
+      
       // Search filter
       const searchLower = searchTerm.toLowerCase();
       const matchesSearch =