Fe 7725 date time numeric input behaviour fix

[ibutakova]

Proposed behaviour

Numeral Date allows standard keyboard editing commands, including copy, paste, selection, and caret navigation.
All three date fields forward unrestricted raw text without length limits. Consumers remain responsible for parsing and accepting values such as localized month names.

Time exposes numeric inputMode, so supporting devices can display a numeric virtual keyboard.

Decimal exposes decimal inputMode, so supporting devices can display a numeric virtual keyboard with a locale-appropriate decimal separator. Consumers can override inputMode property.

The following HTML inputmode attributes provided:

• Numeral Date Day and Year: numeric
• Numeral Date Month: text
• Time Hours and Minutes: numeric
• Decimal: decimal by default, with consumer inputMode overrides supported

Numeral Date retains its advisory numeric-range validation. Non-numeric and incomplete raw values do not produce numeric-range errors. When raw Month or Year values prevent calendar-specific Day validation, only the universal 1–31 Day range is applied.

Current behaviour

Numeral Date prevents most keydown events, which blocks standard keyboard copy, paste, selection, and caret-navigation commands.
Date fields also enforce character-length limits and only support short numeric values.
Time and Decimal do not provide explicit virtual-keyboard hints.

Checklist

• Commits follow our style guide
• Related issues linked in commit messages if required
• Screenshots are included in the PR if useful
• All themes are supported if required
• Unit tests added or updated if required
• Playwright automation tests added or updated if required
• Storybook added or updated if required
• Translations added or updated (including creating or amending translation keys table in storybook) if required
• Typescript d.ts file added or updated if required
• Related docs have been updated if required

QA

• Tested in provided StackBlitz sandbox/Storybook
• Add new Playwright test coverage if required
• Carbon implementation matches Design System/designs
• UI Tests GitHub check reviewed if required

Additional context

This is a behavioral and accessibility change. No visual styling or layout changes are expected.

inputmode is a virtual-keyboard hint only. It does not restrict hardware keyboard, assistive-technology, or pasted input.

Testing instructions

[Fenwick17]

Tested and passes