fix: show full command in tooltip on truncated tool rows

[MattPua]

Problem

When a tool's terminal command is longer than the row width it gets truncated with an ellipsis, and there was no tooltip to reveal what actually ran. It relied on the native title attribute, which is unreliable/absent in-app.

Changes

• Replaced native title={command} on the truncated command row with the Tooltip primitive
• Tooltip renders the full command in a wrapping mono block on hover, so a truncated row always surfaces exactly what ran
• Applied to both chrome paths (new chat thread + legacy thread)

How did you test this?

• pnpm --filter @posthog/ui typecheck passes
• biome check passes on the changed file

Automatic notifications

• Publish to changelog?
• Alert Sales and Marketing teams?

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[github-actions]

React Doctor found no issues in the changed files. 🎉

_{Reviewed by React Doctor for commit 1dbbab4.}