Fix project reopen persistence

frontend/canvas.html

@@ -5261,11 +5261,20 @@ Organization : OptiHK Limited
             }
 
             const data = await response.json();
+            (data.warnings || []).forEach(warning => addLog(warning));
             const technology = data.technology || '';
             setProjectTechnology(technology);
             const manifest = await loadTechnologyManifest(technology);
-            const knownCompositeNames = new Set((data.cells || []).map(cell => cell.name).filter(name => name !== currentProjectName));
-            const parsedCellPages = (data.cells || []).map(cell => pageFromYaml(cell.name, cell.content, manifest, knownCompositeNames));
+            const loadedCells = data.cells || [];
+            const knownCompositeNames = new Set(loadedCells.map(cell => cell.name).filter(name => name !== currentProjectName));
+            const parsedCellPages = [];
+            loadedCells.forEach(cell => {
+              try {
+                parsedCellPages.push(pageFromYaml(cell.name, cell.content, manifest, knownCompositeNames));
+              } catch (error) {
+                addLog(`Skipped saved cell "${cell.name}": ${error.message}`);
+              }
+            });
             const compositeBoxSizes = new Map(parsedCellPages
               .filter(page => page.type === 'composite')
               .map(page => [page.name, calculateCompositeBoxSize(page)]));
@@ -5327,7 +5336,7 @@ Organization : OptiHK Limited
         };
 
         loadProject();
-      }, [library, currentProjectName, loadTechnologyManifest, toBooleanFlag, makeFreeRouteEdge, buildElementNodesFromYaml, getAvailableComponentsForLoadedComponent, resolveLoadedPinHandle]);
+      }, [library, currentProjectName, loadTechnologyManifest, toBooleanFlag, makeFreeRouteEdge, buildElementNodesFromYaml, getAvailableComponentsForLoadedComponent, resolveLoadedPinHandle, addLog]);
 
       useEffect(() => {
         if (activePage && activePage.type !== 'layoutPreview' && reactFlowInstance) {