Fix 3D model viewer to show when editing existing parts

- Add 3D model request when loading part from database
- Add console logging for debugging model extraction
- Request model for both manual footprint selection and auto-loaded parts

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

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

templates/index.html

@@ -1288,6 +1288,7 @@
             });
 
             // Request 3D model
+            console.log('Requesting 3D model for:', footprintName, 'at', selectedFootprintLibraryPath);
             socket.emit('get_footprint_model', {
                 library_path: selectedFootprintLibraryPath,
                 footprint_name: footprintName
@@ -1302,10 +1303,12 @@
         });
 
         socket.on('model_result', (data) => {
+            console.log('Received model_result:', data);
             const container = document.getElementById('modelViewerContainer');
             const messageEl = document.getElementById('modelViewerMessage');
 
             if (data.has_model) {
+                console.log('Model found, displaying viewer');
                 container.style.display = 'block';
                 messageEl.innerHTML = `<strong>3D Model Found:</strong> ${data.name}<br><br>` +
                     `<em>Note: STEP file viewing in browser requires conversion to STL/OBJ format.<br>` +
@@ -1313,6 +1316,7 @@
                     `<a href="data:application/stp;base64,${data.data}" download="${data.name}" ` +
                     `style="color: #007bff; text-decoration: underline; cursor: pointer;">Download ${data.name}</a>`;
             } else {
+                console.log('No model found');
                 container.style.display = 'none';
             }
         });
@@ -1498,6 +1502,9 @@
                     setTimeout(() => {
                         footprintSelect.value = footprintName;
                         socket.emit('render_footprint', { library_path: lib.path, footprint_name: footprintName });
+                        // Also request 3D model
+                        console.log('Requesting 3D model for loaded part:', footprintName, 'at', lib.path);
+                        socket.emit('get_footprint_model', { library_path: lib.path, footprint_name: footprintName });
                     }, 500);
                 }
             }