Phase 992: add read receipt sync agentctl journey stub (v0.8.959)

Non-breaking headless journey for mesh stability UI read receipt sync
keys snapshot and settings panel embed HTML verification.

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

headless.js

@@ -1847,6 +1847,27 @@ class HeadlessSession {
     }
   }
 
+  /** Journey stub: mesh stability UI read receipt sync keys + embed snapshot (Phase 992). */
+  async runMeshStabilityUiReadReceiptSyncJourney (guildId) {
+    if (!this.platform) throw new Error('headless not started')
+    const gid = guildId || this.platform.guild?.guild?.id
+    if (!gid) throw new Error('no guild')
+    const path = require('bare-path')
+    const {
+      listMeshStabilityUiReadReceiptSyncRowFieldKeys,
+      buildMeshStabilityReadReceiptSyncSnapshot
+    } = require('pearcord-platform/mesh-stability-ui-read-receipt-sync-keys')
+    const uiPath = path.join(__dirname, '..', '..', 'apps', 'pearcord', 'ui', 'mesh-stability-ui-read-receipt-sync.js')
+    const { buildMeshStabilityReadReceiptSyncDiagnosticsEmbedHtml } = await import(uiPath)
+    const view = await this.refreshView()
+    const fields = listMeshStabilityUiReadReceiptSyncRowFieldKeys()
+    const snapshot = buildMeshStabilityReadReceiptSyncSnapshot(view)
+    const embedHtml = buildMeshStabilityReadReceiptSyncDiagnosticsEmbedHtml({
+      readReceiptSyncRows: [{ channelName: 'general', channelId: 'abc123def456', lastReadAt: Date.now() }]
+    }, (s) => String(s))
+    return { guildId: gid, fields, snapshot, embedHtml, view }
+  }
+
   /** Journey stub: mesh stability UI partition heal diagnostics keys + embed snapshot (Phase 991). */
   async runMeshStabilityUiPartitionHealDiagnosticsJourney (guildId) {
     if (!this.platform) throw new Error('headless not started')