fix: TruncatedText line-clamp class not applying

[wackerow]

Summary

• Fix line-clamp not working in TruncatedText component
• Tailwind cannot use string-interpolated classes because they are not included in the compiled CSS
• Replace with explicit class mapping object
• Remove redundant maxLines={2} props (2 is already the default)

Test plan

• Verify text truncation works on /apps page cards
• Verify Show more expansion still works

Generated with Claude Code

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