Consistent 44px mobile touch targets + shift-free…

Details

Gate all touch-target growth behind @media (pointer: coarse) so desktop is
unchanged. Location popover close, TPP + EDCR option chips, "show all
publications", hero/contact CTAs, per-paper link pills and command-palette
result rows all now clear the 44px minimum hit area on touch — matching the
existing 44px seed stepper. Compensate the classic desktop scrollbar's width
with padding-right while the command palette locks background scroll, so
opening it no longer shifts page content ~15px sideways (mobile overlay
scrollbars take no layout width, so it's a no-op there).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YB1axhX3kbHCFJbX7LhfH8

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