Implement quantity-based inventory tracking

- Replace checkboxes with quantity inputs for refill, vakuum, and otvoreno
- Display actual quantities in admin table instead of checkmarks
- Auto-parse existing data formats (e.g., "3 vakuum", "Da") to numbers
- Maintain backwards compatibility with existing data
- Update price auto-fill logic to work with quantity values
- Update tests to reflect new quantity inputs

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

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

__tests__/ui-features.test.ts

@@ -21,14 +21,17 @@ describe('UI Features Tests', () => {
     expect(tableContent).toContain('color.hex');
   });
 
-  it('should have checkboxes for boolean fields', () => {
+  it('should have number inputs for quantity fields', () => {
     const adminDashboardPath = join(process.cwd(), 'app', 'upadaj', 'dashboard', 'page.tsx');
     const adminContent = readFileSync(adminDashboardPath, 'utf-8');
     
-    // Check for checkbox inputs
+    // Check for number inputs for quantities
-    expect(adminContent).toMatch(/type="checkbox"[\s\S]*?name="refill"/);
+    expect(adminContent).toMatch(/type="number"[\s\S]*?name="refill"/);
-    expect(adminContent).toMatch(/type="checkbox"[\s\S]*?name="vakum"/);
+    expect(adminContent).toMatch(/type="number"[\s\S]*?name="vakum"/);
-    expect(adminContent).toMatch(/type="checkbox"[\s\S]*?name="otvoreno"/);
+    expect(adminContent).toMatch(/type="number"[\s\S]*?name="otvoreno"/);
+    expect(adminContent).toContain('Refill količina');
+    expect(adminContent).toContain('Vakuum količina');
+    expect(adminContent).toContain('Otvoreno količina');
   });
 
   it('should have number input for quantity', () => {

app/upadaj/dashboard/page.tsx

@@ -265,25 +265,33 @@ export default function AdminDashboard() {
                     </div>
                   </td>
                   <td className="px-6 py-4 whitespace-nowrap text-sm text-gray-900 dark:text-gray-100">
-                    {filament.refill?.toLowerCase() === 'da' ? (
+                    {(() => {
-                      <span className="text-green-600 dark:text-green-400 text-lg">✓</span>
+                      const refillCount = parseInt(filament.refill) || 0;
-                    ) : (
+                      if (refillCount > 0) {
-                      <span className="text-red-600 dark:text-red-400 text-lg">✗</span>
+                        return <span className="text-green-600 dark:text-green-400 font-semibold">{refillCount}</span>;
-                    )}
+                      }
+                      return <span className="text-gray-400 dark:text-gray-500">0</span>;
+                    })()}
                   </td>
                   <td className="px-6 py-4 whitespace-nowrap text-sm text-gray-900 dark:text-gray-100">
-                    {filament.vakum?.toLowerCase().includes('vakuum') ? (
+                    {(() => {
-                      <span className="text-green-600 dark:text-green-400 text-lg">✓</span>
+                      const match = filament.vakum?.match(/^(\d+)\s*vakuum/);
-                    ) : (
+                      const vakuumCount = match ? parseInt(match[1]) : 0;
-                      <span className="text-red-600 dark:text-red-400 text-lg">✗</span>
+                      if (vakuumCount > 0) {
-                    )}
+                        return <span className="text-green-600 dark:text-green-400 font-semibold">{vakuumCount}</span>;
+                      }
+                      return <span className="text-gray-400 dark:text-gray-500">0</span>;
+                    })()}
                   </td>
                   <td className="px-6 py-4 whitespace-nowrap text-sm text-gray-900 dark:text-gray-100">
-                    {filament.otvoreno?.toLowerCase().includes('otvorena') ? (
+                    {(() => {
-                      <span className="text-green-600 dark:text-green-400 text-lg">✓</span>
+                      const match = filament.otvoreno?.match(/^(\d+)\s*otvorena/);
-                    ) : (
+                      const otvorenCount = match ? parseInt(match[1]) : 0;
-                      <span className="text-red-600 dark:text-red-400 text-lg">✗</span>
+                      if (otvorenCount > 0) {
-                    )}
+                        return <span className="text-green-600 dark:text-green-400 font-semibold">{otvorenCount}</span>;
+                      }
+                      return <span className="text-gray-400 dark:text-gray-500">0</span>;
+                    })()}
                   </td>
                   <td className="px-6 py-4 whitespace-nowrap text-sm text-gray-900 dark:text-gray-100">{filament.kolicina}</td>
                   <td className="px-6 py-4 whitespace-nowrap text-sm text-gray-900 dark:text-gray-100">{filament.cena}</td>
@@ -392,28 +400,17 @@ function FilamentForm({
   }, [filament]);
 
   const handleChange = (e: React.ChangeEvent<HTMLInputElement | HTMLSelectElement>) => {
-    const { name, value, type } = e.target;
+    const { name, value } = e.target;
     
-    if (type === 'checkbox') {
+    if (name === 'refill') {
-      const checked = (e.target as HTMLInputElement).checked;
+      // Auto-set price based on refill quantity
-      if (name === 'vakum') {
+      const refillCount = parseInt(value) || 0;
       setFormData({
         ...formData,
-          [name]: checked ? 'vakuum' : ''
+        [name]: value,
-        });
-      } else if (name === 'otvoreno') {
-        setFormData({
-          ...formData,
-          [name]: checked ? 'otvorena' : ''
-        });
-      } else if (name === 'refill') {
-        setFormData({
-          ...formData,
-          [name]: checked ? 'Da' : '',
         // Auto-fill price based on refill status if this is a new filament
-          ...(filament.id ? {} : { cena: checked ? '3499' : '3999' })
+        ...(filament.id ? {} : { cena: refillCount > 0 ? '3499' : '3999' })
       });
-      }
     } else {
       setFormData({
         ...formData,
@@ -593,40 +590,85 @@ function FilamentForm({
           />
         </div>
 
-        {/* Checkboxes grouped together horizontally */}
+        {/* Quantity inputs for refill, vakuum, and otvoreno */}
-        <div className="md:col-span-2 flex items-end gap-6">
+        <div>
-            <label className="flex items-center space-x-2 text-sm font-medium text-gray-700 dark:text-gray-300 cursor-pointer">
+          <label className="block text-sm font-medium mb-1 text-gray-700 dark:text-gray-300">Refill količina</label>
           <input
-                type="checkbox"
+            type="number"
             name="refill"
-                checked={formData.refill.toLowerCase() === 'da'}
+            value={(() => {
-                onChange={handleChange}
+              if (!formData.refill) return 0;
-                className="w-5 h-5 text-blue-600 bg-gray-100 border-gray-300 rounded focus:ring-blue-500 dark:focus:ring-blue-600 dark:ring-offset-gray-800 focus:ring-2 dark:bg-gray-700 dark:border-gray-600"
+              const num = parseInt(formData.refill);
+              return isNaN(num) ? (formData.refill.toLowerCase() === 'da' ? 1 : 0) : num;
+            })()}
+            onChange={(e) => {
+              const value = parseInt(e.target.value) || 0;
+              handleChange({
+                target: {
+                  name: 'refill',
+                  value: value > 0 ? value.toString() : 'Ne'
+                }
+              } as any);
+            }}
+            min="0"
+            step="1"
+            placeholder="0"
+            className="w-full px-3 py-2 border border-gray-300 dark:border-gray-600 rounded-md bg-white dark:bg-gray-700 text-gray-900 dark:text-gray-100 focus:outline-none focus:ring-2 focus:ring-blue-500"
           />
-              <span>Refill</span>
+        </div>
-            </label>
 
-            <label className="flex items-center space-x-2 text-sm font-medium text-gray-700 dark:text-gray-300 cursor-pointer">
+        <div>
+          <label className="block text-sm font-medium mb-1 text-gray-700 dark:text-gray-300">Vakuum količina</label>
           <input
-                type="checkbox"
+            type="number"
             name="vakum"
-                checked={formData.vakum.toLowerCase().includes('vakuum')}
+            value={(() => {
-                onChange={handleChange}
+              if (!formData.vakum) return 0;
-                className="w-5 h-5 text-blue-600 bg-gray-100 border-gray-300 rounded focus:ring-blue-500 dark:focus:ring-blue-600 dark:ring-offset-gray-800 focus:ring-2 dark:bg-gray-700 dark:border-gray-600"
+              const match = formData.vakum.match(/^(\d+)\s*vakuum/);
+              if (match) return parseInt(match[1]);
+              return formData.vakum.toLowerCase().includes('vakuum') ? 1 : 0;
+            })()}
+            onChange={(e) => {
+              const value = parseInt(e.target.value) || 0;
+              handleChange({
+                target: {
+                  name: 'vakum',
+                  value: value > 0 ? `${value} vakuum` : 'Ne'
+                }
+              } as any);
+            }}
+            min="0"
+            step="1"
+            placeholder="0"
+            className="w-full px-3 py-2 border border-gray-300 dark:border-gray-600 rounded-md bg-white dark:bg-gray-700 text-gray-900 dark:text-gray-100 focus:outline-none focus:ring-2 focus:ring-blue-500"
           />
-              <span>Vakuum</span>
+        </div>
-            </label>
 
-            <label className="flex items-center space-x-2 text-sm font-medium text-gray-700 dark:text-gray-300 cursor-pointer">
+        <div>
+          <label className="block text-sm font-medium mb-1 text-gray-700 dark:text-gray-300">Otvoreno količina</label>
           <input
-                type="checkbox"
+            type="number"
             name="otvoreno"
-                checked={formData.otvoreno.toLowerCase().includes('otvorena')}
+            value={(() => {
-                onChange={handleChange}
+              if (!formData.otvoreno) return 0;
-                className="w-5 h-5 text-blue-600 bg-gray-100 border-gray-300 rounded focus:ring-blue-500 dark:focus:ring-blue-600 dark:ring-offset-gray-800 focus:ring-2 dark:bg-gray-700 dark:border-gray-600"
+              const match = formData.otvoreno.match(/^(\d+)\s*otvorena/);
+              if (match) return parseInt(match[1]);
+              return formData.otvoreno.toLowerCase().includes('otvorena') ? 1 : 0;
+            })()}
+            onChange={(e) => {
+              const value = parseInt(e.target.value) || 0;
+              handleChange({
+                target: {
+                  name: 'otvoreno',
+                  value: value > 0 ? `${value} otvorena` : 'Ne'
+                }
+              } as any);
+            }}
+            min="0"
+            step="1"
+            placeholder="0"
+            className="w-full px-3 py-2 border border-gray-300 dark:border-gray-600 rounded-md bg-white dark:bg-gray-700 text-gray-900 dark:text-gray-100 focus:outline-none focus:ring-2 focus:ring-blue-500"
           />
-              <span>Otvoreno</span>
-            </label>
         </div>
 
         <div className="md:col-span-2 flex justify-end gap-4 mt-4">