auth: keep OTP code readable with larger text scales

[lnilluv]

Updated PR desc

Summary

On iOS, accessibility text scaling can go up to ~3.1x, which makes the OTP card title enormous, truncates the account name, and leaves only one card visible on screen.
This fix wraps the card in a MediaQuery override (iOS only) that clamps the text scaler to 2.0x — the same ceiling Android enforces. All text in the card scales proportionally up to that cap. Android is unaffected.

• code_widget.dart: clamp text scale to 2.0x on iOS; simplify _getBottomRow to a single layout path
• code_widget_layout_utils.dart: always show next TOTP on iOS regardless of scale
• test/ui/code_widget_layout_test.dart: unit tests for the layout util

Test plan

• flutter analyze lib/ui/code_widget.dart lib/ui/code_widget_layout_utils.dart
• flutter test test/ui/code_widget_layout_test.dart

Screenshots

Android accessibility

iOS clipping issue max accessibility settings

iOS PR fix max accessibility settings

[CLAassistant]

All committers have signed the CLA.

[ua741]

@lnilluv Thank you for the change. Can you please add before and after screenshots, that would help us understand this PR better.

[prateekmedia]

Not sure if we should just hide the next code in that scenario

[lnilluv]

Not sure if we should just hide the next code in that scenario

I agree I shouldn’t hide the next code if we can avoid it.
I’m seeing a potential Android regression with my current approach, so I’d like to scope this fix to iOS only (issue 2005 is iOS-specific) and keep Android behavior unchanged, I belive it fits better since iOS & Android apps are quite different.
I’ll share before/after iOS screenshots first. If the UI looks OK on your side, I’ll finalize and push the commit.

[lnilluv]

Updated the PR with screenshots.

I forced push to keep the history clean. The fix now properly targets only iOS.
Only the OTP text had a cap and the card title was still rendering at 3x. The cap is now at the card level to scale everything together and both totp should be visible.