- New lib/targets.ts: per-code localStorage (key `targets:<code>`) with
read/write/clear; rejects non-positive/non-finite values.
- New PriceTargets sidebar panel: 목표가/손절가 inputs, live %-from-current
preview (rose=up, sky=down), save/clear actions.
- StockChart accepts optional `targets` prop and draws dashed horizontal
price lines on the candle series (rose=target, sky=stop) with axis labels.
- Page loads saved targets on mount/code-change and re-renders chart on save.
Also fixes view-counter dedupe caveat from reviewer: split into
wasRecordedToday() + markRecorded(); the page now marks localStorage only
after POST /api/views succeeds, so a failed POST stays retryable on the
next visit instead of being silently swallowed for the day.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
