Bug: sessionStorage operations (getItem, setItem, removeItem) could fail
if storage is unavailable (private mode, quota exceeded, etc.), causing
form draft recovery to break.
Fix: Wrap all sessionStorage operations in try/catch via safeStorage helper.
- safeStorage.getItem() - returns null on error
- safeStorage.setItem() - silently ignores errors
- safeStorage.removeItem() - silently ignores errors
This ensures:
- Draft recovery works even if storage is partially unavailable
- Form submission doesn't crash if storage is full
- Cleanup on success doesn't crash
- File input values are not saved (already handled by FormData filter)
Verification:
- Astro build: 0 errors
- All existing A05 behavior preserved
- Error handling added for read, write, and cleanup
ik
1d403883a0