feat: Custom numpad doesn't work with host keystrokes when connected

[ovitrif]

Description

It would be great if we can hook the keys of the custom number pad so if device is connected to host machine, or if app runs in emulator, we can use our laptops keyboard to enter amounts.

It should be doable with compose, also the OS soft keyboard works this way.

[ovitrif]

@claude implement this on new branch ready for a draft PR.

[claude]

Claude finished @ovitrif's task in 2m 18s —— View job • claude/issue-719-20260123-1229 • Create PR ➔

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Custom numpad keyboard support implemented ✓

Tasks Completed

• Read repository guidelines (CLAUDE.md)
• Locate custom numpad implementation
• Analyze current implementation
• Implement keyboard input handling
• Commit and push changes
• Provide PR creation link

Implementation Summary

Added keyboard support to the NumberPad component in app/src/main/java/to/bitkit/ui/components/NumberPad.kt:75-156. The implementation enables users to enter amounts using their laptop keyboard when the device is connected to a host machine or running in an emulator.

Key changes:

• Added FocusRequester to automatically request focus when NumberPad is displayed
• Implemented onKeyEvent handler to capture hardware keyboard input
• Mapped both regular number keys (0-9) and numpad keys to corresponding actions
• Added support for decimal point (period key) when NumberPad type is DECIMAL
• Mapped Backspace and Delete keys to the delete action
• All keyboard events are only processed on KeyDown to match standard behavior

The keyboard input follows the same flow as touch input, calling the existing onPress handler with the appropriate key value, ensuring consistent behavior across both input methods.

Notes

• Unable to run ./gradlew compileDevDebugKotlin and ./gradlew detekt due to permission requirements in the CI environment
• Please verify compilation and run linter locally before merging
• The implementation follows Compose best practices and existing code patterns in the project

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Branch: claude/issue-719-20260123-1229