Fix project card timestamp overflow on iPad portrait

[Copilot]

On narrow viewports (iPad portrait), the "a few seconds ago" timestamp in My Projects cards overflows the card boundary. The .ui.card.file .meta element in pxt-core has a fixed height: 4rem but at tablet widths (200px cards), the timestamp text wraps to multiple lines and spills out.

• Reduce .meta font-size to 0.7rem and padding to 0.5rem at the tablet breakpoint (max-width: @largestTabletScreen) in the target theme override (theme/style.less), matching the approach already used at the mobile breakpoint in pxt-core. This ensures the timestamp text wraps properly and fits within the card rather than being cut off.

[srietkerk]

@copilot This isn't the desired behavior. We do not want any content to be cutoff, which is what adding an overflow: hidden rule will do. It would be better to wrap the text content, so it fits within the dimensions of the card.

[Copilot]

@copilot This isn't the desired behavior. We do not want any content to be cutoff, which is what adding an overflow: hidden rule will do. It would be better to wrap the text content, so it fits with...

Replaced overflow: hidden with a font-size and padding reduction at the tablet breakpoint (max-width: @largestTabletScreen). This matches the approach already used at the mobile breakpoint in pxt-core's home.less (line 1094), so the timestamp text wraps properly and fits within the card instead of being cut off. See commit b3d3316.