fix: Resolve bcrypt architecture and duplicate resource creation issues

Backend fixes:
- Fix bcrypt exec format error for ARM64 architecture
- Add architecture detection for MinIO client download
- Install build tools and rebuild bcrypt from source
- Add postinstall script to automatically rebuild bcrypt
- Rebuild bcrypt after copying files to ensure correct binary

Frontend fixes:
- Handle duplicate resource creation in QuickStartWizard
- Add error handling for "already exists" scenarios
- Prevent multiple executions with isCreating flag
- Allow wizard to complete even if resources already exist

These changes fix:
1. Backend crash on ARM64 due to bcrypt binary mismatch
2. 500 errors when resources already exist in QuickStartWizard
3. Race conditions when clicking Complete button multiple times

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

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

backend/package.json

@@ -11,7 +11,8 @@
     "lint": "eslint src/",
     "lint:fix": "eslint src/ --fix",
     "hash-password": "node scripts/hash-password.js",
-    "generate-password": "node generate-password.js"
+    "generate-password": "node generate-password.js",
+    "postinstall": "npm rebuild bcrypt --build-from-source"
   },
   "keywords": ["minio", "api", "backend"],
   "author": "",