fix: let calendar use container width (#10209)

[aakarsh12x]

What's the problem?

The Calendar component used w-fit on its root class, which caused it to shrink-wrap its content instead of filling the available container width. This made it impossible to use the calendar in full-width layouts (e.g., dashboard cards, sidebars, date range pickers).

Reported in #10209.

What changed?

Changed w-fit -> w-full on the root class across all calendar variants and style themes.

Files updated:

• apps/v4/registry/new-york-v4/ui/calendar.tsx
• • apps/v4/registry/bases/radix/ui/calendar.tsx
• • apps/v4/registry/bases/base/ui/calendar.tsx
• • All apps/v4/styles/*/ui/calendar.tsx variants (radix-nova, radix-luma, radix-vega, radix-mira, radix-maia, radix-lyra, base-nova, base-luma, base-vega, base-mira, base-maia, base-lyra, including RTL)
• • apps/v4/examples/base/calendar-hijri.tsx
• • apps/v4/examples/radix/calendar-hijri.tsx

Before / After

Before	After
root: cn("w-fit", defaultClassNames.root)	root: cn("w-full", defaultClassNames.root)

The calendar now fills its container width, consistent with how month, week, table, and weekday already use w-full.

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