Add modal-based photo upload for better mobile support

- Show a modal with file input and preview
- Uses alert() instead of toast for error messages (more visible on mobile)
- Preview shows selected image before upload
- Submit button with loading state
- Keeps old uploadPhoto function for compatibility

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

portal/menu-builder.html

@@ -1753,7 +1753,7 @@
                 `<span>No photo yet</span>`}
             </div>
             <div class="photo-actions">
-              <button class="btn btn-secondary" onclick="MenuBuilder.uploadPhoto('${item.id}')">
+              <button class="btn btn-secondary" onclick="MenuBuilder.showUploadModal('${item.id}', '${item.dbId || ''}')">
                 Upload
               </button>
               <button class="btn btn-secondary" onclick="MenuBuilder.createPhotoTask('${item.id}')">
@@ -2804,10 +2804,108 @@
         }
       },
 
+      // Show upload modal - works better on mobile
+      showUploadModal(itemId, dbId) {
+        if (!dbId) {
+          alert('Please save the menu first before uploading photos.');
+          return;
+        }
+
+        document.getElementById('modalTitle').textContent = 'Upload Item Photo';
+        document.getElementById('modalBody').innerHTML = `
+          <form id="photoUploadForm" enctype="multipart/form-data" style="text-align: center;">
+            <input type="hidden" name="ItemID" value="${dbId}">
+            <input type="hidden" id="uploadItemId" value="${itemId}">
+            <p style="color: var(--gray-600); margin-bottom: 16px;">
+              Select or take a photo for this item
+            </p>
+            <div style="margin-bottom: 16px;">
+              <input type="file" name="photo" id="modalPhotoInput" accept="image/*"
+                     style="font-size: 16px; padding: 12px; border: 2px dashed var(--gray-300);
+                            border-radius: 8px; width: 100%; cursor: pointer;">
+            </div>
+            <div id="uploadPreview" style="margin-bottom: 16px; display: none;">
+              <img id="previewImg" style="max-width: 100%; max-height: 200px; border-radius: 8px;">
+            </div>
+            <button type="submit" class="btn btn-primary" id="uploadSubmitBtn" disabled
+                    style="width: 100%; padding: 12px;">
+              Upload Photo
+            </button>
+          </form>
+        `;
+        this.showModal();
+
+        const fileInput = document.getElementById('modalPhotoInput');
+        const submitBtn = document.getElementById('uploadSubmitBtn');
+        const preview = document.getElementById('uploadPreview');
+        const previewImg = document.getElementById('previewImg');
+        const form = document.getElementById('photoUploadForm');
+
+        fileInput.addEventListener('change', (e) => {
+          const file = e.target.files[0];
+          if (file) {
+            submitBtn.disabled = false;
+            // Show preview
+            const reader = new FileReader();
+            reader.onload = (ev) => {
+              previewImg.src = ev.target.result;
+              preview.style.display = 'block';
+            };
+            reader.readAsDataURL(file);
+          }
+        });
+
+        form.addEventListener('submit', async (e) => {
+          e.preventDefault();
+          const file = fileInput.files[0];
+          if (!file) return;
+
+          submitBtn.disabled = true;
+          submitBtn.textContent = 'Uploading...';
+
+          try {
+            const formData = new FormData();
+            formData.append('photo', file);
+            formData.append('ItemID', dbId);
+
+            const response = await fetch(`${this.config.apiBaseUrl}/menu/uploadItemPhoto.cfm`, {
+              method: 'POST',
+              body: formData,
+              credentials: 'include'
+            });
+
+            const data = await response.json();
+            if (data.OK) {
+              // Update the item
+              const itemIdVal = document.getElementById('uploadItemId').value;
+              for (const cat of this.menu.categories) {
+                const item = cat.items.find(i => i.id === itemIdVal);
+                if (item) {
+                  item.imageUrl = data.IMAGEURL + '?t=' + Date.now();
+                  break;
+                }
+              }
+              this.closeModal();
+              this.render();
+              this.toast('Photo uploaded!', 'success');
+            } else {
+              alert('Upload failed: ' + (data.MESSAGE || data.ERROR || 'Unknown error'));
+              submitBtn.disabled = false;
+              submitBtn.textContent = 'Upload Photo';
+            }
+          } catch (err) {
+            console.error('Upload error:', err);
+            alert('Upload failed: ' + err.message);
+            submitBtn.disabled = false;
+            submitBtn.textContent = 'Upload Photo';
+          }
+        });
+      },
+
       // Pending photo upload info (for mobile camera flow)
       _pendingPhotoUpload: null,
 
-      // Upload photo - mobile-friendly version
+      // Upload photo - legacy version (kept for compatibility)
       uploadPhoto(itemId) {
         // Find the item and check it has a database ID
         let targetItem = null;