Integrate markdown unfurl policy into embed queue and edit flows.

Skips hub and emoji-only layouts, refreshes embeds when edit changes URL,
filters linkEmbedsByMessage by layout, and logs markdown-embed suppressions.

Co-authored-by: Cursor <[email protected]>

index.js

@@ -259,6 +259,7 @@ const {
   contentHasChannelMention,
   extractFirstUrl,
   extractUrls,
+  shouldUnfurlMessageLayout,
   parsePearcordDeepLink,
   ALLOWED_DEEP_LINK_KINDS,
   validatePastedNavigationInput,
@@ -17429,9 +17430,20 @@ class PearcordPlatform extends EventEmitter {
     if (prefs && (prefs.showLinkPreviews === false || prefs.linkPreviewsEnabled === false)) return
     if (opts.composerPrefetch && this._composerImeComposing) return
     if (this._readOnly) return
+    if (enrichMessageHubMirror(msg).hubMirror) return
+    if (!shouldUnfurlMessageLayout(messageLayoutKind(enrichMessageStickerNames(msg)))) return
     const plain = this._messagePlaintext(msg)
     const url = extractFirstUrl(plain)
-    if (!url) return
+    if (!url) {
+      if (/https?:\/\//i.test(plain)) {
+        this.log.debug('markdown-embed suppressed', {
+          spanKind: 'markdown-embed',
+          messageId: msg.id,
+          channelId: msg.channelId || this.activeChannelId || null
+        })
+      }
+      return
+    }
     if (this._embedPrefetchCoalesce.has(url)) {
       return this._embedPrefetchCoalesce.get(url)
     }
@@ -21573,9 +21585,9 @@ class PearcordPlatform extends EventEmitter {
       const priorLength = String(prior?.content || '').length
       const msg = await this.messages.edit(messageId, content)
       const nextPlain = this._messagePlaintext(msg)
-      const hadUrl = !!extractFirstUrl(priorPlain)
-      const hasUrl = !!extractFirstUrl(nextPlain)
-      if (hadUrl && !hasUrl && this.embeds?.clearForMessageContent) {
+      const priorUrl = extractFirstUrl(priorPlain)
+      const nextUrl = extractFirstUrl(nextPlain)
+      if (priorUrl && !nextUrl && this.embeds?.clearForMessageContent) {
         const cleared = await this.embeds.clearForMessageContent(priorPlain).catch(() => null)
         if (cleared?.hadUrl) {
           this.log.debug('embed.clear on edit', {
@@ -21584,7 +21596,12 @@ class PearcordPlatform extends EventEmitter {
             url: cleared.url
           })
         }
-      } else if (hasUrl && !hadUrl) {
+      } else if (nextUrl && priorUrl !== nextUrl) {
+        if (priorUrl && this.embeds?.clearForMessageContent) {
+          await this.embeds.clearForMessageContent(priorPlain).catch(() => null)
+        }
+        this._queueLinkEmbed(msg, { force: true }).catch(() => {})
+      } else if (nextUrl && !priorUrl) {
         this._queueLinkEmbed(msg).catch(() => {})
       }
       if (this.mode === 'dm' && this.dm) this.dm.gossipMessageUpdate(msg)
@@ -23148,7 +23165,10 @@ class PearcordPlatform extends EventEmitter {
     const linkEmbedsByMessage = {}
     const embedResolveLatencyByMessage = {}
     for (const m of messages) {
-      const plain = this._messagePlaintext(m)
+      const enrichedRow = enrichMessageRow(m)
+      if (!shouldUnfurlMessageLayout(messageLayoutKind(enrichedRow))) continue
+      if (enrichedRow.hubMirror) continue
+      const plain = this._messagePlaintext(enrichedRow)
       const urls = extractUrls(plain, 3)
       if (!urls.length || !this.embeds) continue
       const rows = []