fix: improve many-apps UX and record content interaction
- fix icon movement when selected by using absolute positioning for labels
- add pulsing animation on selected state to invite second-click interaction
- remove parentheses from "what is a PDS?" link for cleaner appearance
- add text cursor on record content to indicate text is selectable
- prevent collection content clicks from closing the expanded section
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>