Kaia Counter Test v0.5.7 — mask persistence fix

Source generation:
- v0.5.6 was copied as the predecessor.
- v0.5.6 remains untouched.

Fix:
- The stored issued number is no longer rendered by PHP on page reload.
- Initial/reloaded display is always the 8-cell KaiaSpec mask.
- The number can still appear immediately after a successful GET NUMBER action via the existing front-end behavior.
- Existing issuance history, one-per-donation control, and cooldown logic are retained.

Validation:
- PHP syntax check passed.
