Consider changing Card default Width from Size.Full() to Size.Fraction(1)

[nielsbosma]

Problem

Card defaults to Width = Size.Full() (100% width) in its constructor (src/Ivy/Widgets/Card.cs:27). When multiple Cards are placed inside Layout.Horizontal(), they each take 100% width and stack vertically instead of appearing side-by-side.

This is a common pitfall — agents and new users frequently place Cards in horizontal layouts and get unexpected stacking behavior.

Screenshots

See session 55e7f454-675e-4e7f-b29e-e93134530200 for visual evidence.

Possible Solutions

1. Change default to Size.Fraction(1) — Cards in horizontal layouts would share space equally by default. This better matches flex-item behavior but is a breaking change for any layout relying on Cards being full-width by default.

2. Keep current default, improve docs — Add FAQ entries explaining the workaround (Width(Size.Fraction(1))). Already done in StackLayout docs.

3. Context-aware default — Card could detect its parent layout orientation and adjust, but this adds complexity.

Questions for Review

• Is Size.Full() the right default for Card, given that horizontal layouts are a common use case?
• Would changing to Size.Fraction(1) cause significant breakage?
• Should other widgets with Size.Full() defaults be reviewed similarly?

[ArtemKhvorostianyi]

In current implementation without any changes in API
For layout horizontal placing multiplce cards place them with width.fit() so they are placed in one row as expected:

For layout vertical cards take width and are placed "one card for row"

Please describe issue with more details or screenshots, because now cards LGTM.
The only thing that can cause pure UX is that when user use layout horizontal and manually set width to full or fraction (1), cards are still being fit in one row. I think this behaviour should give same result as placing cards in layout vertical. But this issue is about layouts or width rather then about cards