- New ShareButton in the page header tries navigator.share() first
(native sheet on mobile), then falls back to navigator.clipboard, then
to a hidden textarea + execCommand("copy") for non-secure-context LAN.
Shows a brief "링크 복사됨" / "복사 안됨" toast; native share success
shows none (the OS sheet is the feedback).
- Mounted between ⇄ 비교 and the Star button.
Fixes reviewer concern on 442cc38: writeNote() used to return null for
both "user emptied the textarea (intentional delete)" and "localStorage
quota failure," so clearing a note showed "저장 안됨." It now returns a
discriminated { status: "saved" | "deleted" | "failed" } and the panel
shows "저장됨" / "삭제됨" / "저장 안됨" accordingly. Failure keeps the
user's text so they can retry or shorten it.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
