fix(project): stabilize project deletion

- Guard renderer project list/get against stale initial loads
- Retry project zip/cache removal to handle transient Windows locks
- Surface deletion failures in UI and add regression tests

Made-with: Cursor

app/main/project/zipStore.ts

@@ -24,6 +24,7 @@ import { asAssetId, asGraphNodeId, asProjectId } from '../../shared/types/ids';
 import { getAppSemanticVersion } from '../versionInfo';
 
 import { reconcileAssetFiles } from './assetPrune';
+import { rmWithRetries } from './fsRetry';
 import { getLegacyProjectsRootDirs, getProjectsCacheRootDir, getProjectsRootDir } from './paths';
 import { readProjectJsonFromZip, unzipToDir } from './yauzlProjectZip';
 
@@ -792,8 +793,8 @@ export class ZipProjectStore {
       this.projectSession += 1;
     }
 
-    await fs.rm(zipPath, { force: true }).catch(() => undefined);
-    await fs.rm(cacheDir, { recursive: true, force: true }).catch(() => undefined);
+    await rmWithRetries(fs.rm, zipPath, { force: true });
+    await rmWithRetries(fs.rm, cacheDir, { recursive: true, force: true });
   }
 
   private randomId(): string {