Replace the multi-row wizard-style form (Ticker / Qty on row 1, mode
radios on row 2, Date+Cost on row 3) with a single horizontal strip
that sits unobtrusively above the portfolio table. The radio toggle is
gone; a small calendar icon next to the Cost input pops out a date
picker that auto-fills cost on selection and then hides itself.
Same input IDs, so the existing validate/Add/× handlers work unchanged.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
