Alexander Whitestone db2eb7faa7 fix: remove dead export/import code from utils.js, improve render.js file-based export/import ...

- Remove duplicate clipboard/prompt-based exportSave/importSave from utils.js
  (render.js file-based versions were already overriding them)
- Add toast notifications for export success and import errors
- Add isValidSaveData() with robust validation (checks totalCode, code, buildings, phase)
- Prevent duplicate file dialogs on rapid E key presses
- Clean up file input element when user cancels dialog
- Add toast for JSON parse errors on import

2026-04-11 18:48:25 -04:00

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