Revert "fix(mifare): handle readable Key B fields correctly"

[GameTec-live]

Reverts #973

Didnt test enough. My bad.

closes #976

[greptile-apps]

Greptile Summary

This PR deliberately reverts the recently added handling and UI representation for readable MIFARE Classic Key B fields after the fix proved insufficiently tested.

• Removes the readable Key B checkmark state, tooltip, and associated data storage.
• Restores the previous key checking, propagation, and sector-completion behavior.
• Updates the MIFARE Classic UI and widget test for the restored constructor contract.

Confidence Score: 5/5

The PR appears safe to merge as the reviewed changes consistently perform the explicitly requested revert without leaving broken references or incompatible persisted state.

The readable Key B state, storage, UI handling, constructor arguments, and test setup are removed consistently, and no unacknowledged actionable defect remains.

Important Files Changed

Filename	Overview
chameleonultragui/lib/helpers/mifare_classic/recovery.dart	Restores the previous MIFARE Classic key-recovery behavior by removing readable Key B classification and memory-access verification.
chameleonultragui/lib/gui/component/key_check_marks.dart	Removes the readable-data input and blue visibility indicator associated with readable Key B fields.
chameleonultragui/lib/gui/component/mifare/classic.dart	Updates the sole production KeyCheckMarks call site to match the reverted widget API.
chameleonultragui/test/key_check_marks_test.dart	Updates the widget test setup to match the reverted KeyCheckMarks constructor.

_{Reviews (1): Last reviewed commit: "Revert "fix(mifare): handle readable Key..." | Re-trigger Greptile}