Markdown conceal: named links still paint as label (url) when OSC 8 is available #1435

Summary

When conceal is on, named markdown links always paint as:

label (https://example.com/path)

even if the terminal already has OSC 8 hyperlinks. The url field on those chunks is set correctly, so the whole span is clickable — the href is just still visible.

Expected when OSC 8 / hyperlinks capability is on: visible text is only label, with { url: href } on the label chunks.

Expected when OSC 8 is off: keep today’s label (url) so the target is still readable.

Not the same as

• MarkdownRenderable: bare URLs duplicated as 'url (url)' in concealed mode #1050 — bare URLs duplicated as url (url). That issue treats named [click here](https://…) → click here (https://…) as intended. This issue is the opposite product call for named links when OSC 8 is available.
• [Bug] OSC 8 hyperlink labels are not clickable #869 — label vs URL-suffix clickability (Windows Terminal). Here OSC 8 already covers the span; the bug is visible href duplication.

Where

packages/core/src/renderables/Markdown.ts, case "link" in renderInlineToken:

case "link": {
  const linkHref = { url: token.href }
  if (this._conceal) {
    for (const child of token.tokens) {
      this.renderInlineTokenWithStyle(child as MarkedToken, chunks, "markup.link.label", linkHref)
    }
    chunks.push(this.createChunk(" (", "markup.link", linkHref))
    chunks.push(this.createChunk(token.href, "markup.link.url", linkHref))
    chunks.push(this.createChunk(")", "markup.link", linkHref))
  }
  // ...
}

createChunk already attaches OSC 8 via the link field. Conceal still appends " (" + href + ")" unconditionally.

Contrast: case "image" in the same function already omits the href when conceal is on (label-only + { url }).

Suggested fix

When conceal is on and hyperlinks are enabled (setHyperlinksCapability / OSC 8), emit only the label tokens with { url: token.href }. Skip the " (", href, ")" chunks.

When hyperlinks are off, keep the expanded label (url) fallback.

Optional extra (orthogonal, #1050): if link text === href, never append the suffix.

Why it matters

Consumers (OpenCode TUI) tell agents to write [short-label](long-url) so tables/lists stay narrow. Painting the full URL next to the label undoes that. Agents cannot emit raw OSC 8 (pipeline strips/mangles it); markdown → conceal paint is the only path.

Consumer

anomalyco/opencode#45001 (Warp, OpenCode 1.18.23: OSC 8 works, href still visible).