fix(ui): remove fixed width constraint on AppSwitcher text to prevent clipping (#3161)

* fix(ui): remove fixed width constraint on AppSwitcher text to prevent clipping

App names like "Claude Desktop" were being clipped by the max-w-[90px]
constraint on the text label. Changed to max-w-none so text adapts to
content width. Also removed overflow-x-hidden from the parent toolbar
container to prevent clipping of the wider content.

Fixes text truncation in the top-right app switcher segmented control.

* - fix(ui): preserve AppSwitcher compact overflow behavior

- Restore toolbar overflow clipping required by useAutoCompact.

- Cap expanded AppSwitcher labels at 120px so Claude Desktop fits while compact animation remains smooth.

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Co-authored-by: Jason <farion1231@gmail.com>