Random password app opt

[zxkmm]

Brief description of what you did

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Proof that your changes work

🖥️ Proof it compiles

📱 Proof of testing on a real device

📡 Proof against a real emitter/receiver (if applicable)

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📚 Wiki documentation commitment

• I will (or already) create(d) wiki document for my newly added feature

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Checklist

• Kept changes minimal and limited to necessary files
• Verified functionality remains intact and code compiles
• Attached proof that the code compiles successfully (or marked N/A as a trusted contributor)
• Attached proof of testing on real PortaPack hardware (or marked N/A as a trusted contributor)
• Attached proof of testing against a real emitter/receiver (if RF-related), or marked N/A with justification
• I understand that by getting this PR merged, I am implicitly agreeing to create or update the corresponding wiki page (including a main-screen screenshot, description, controls, and limitations)
• I own all rights to this code (i.e., all code contained in this PR), including compliant usage rights for third-party libraries, and I agree that this code is licensed under the license of this project (GPL-3.0).
• If any third-party libraries are used, I confirm that their licenses comply with the requirements for contributing to this repository.
• Reviewed the Contributing Guidelines