feat(phase711): activity invite CSV & profile banner export mesh parity (v0.8.686)

Complete Phase 711 with RPC 140/141 activity invite and profile banner CSV
mesh exports. Add activity-csv-ui.js modal, platform mixin, delivery-receipts
collections, guild gossip, ui-flow IPC, agentctl journeys, smokes, and app.js
integration. Fix corrupted CSS media-query blocks for CSV modals. Document in
ACTIVITY_INVITE_CSV.md and open Phase 712 session activity + avatar decoration.

index.js

@@ -622,6 +622,12 @@ class PearcordGuild extends EventEmitter {
     if (method === RPC.GUILD_WIDGET_EXPORT_CSV_SYNC) {
       this.emit('guild-widget-export-csv-sync', payload)
     }
+    if (method === RPC.ACTIVITY_INVITE_CSV_SYNC) {
+      this.emit('activity-invite-csv-sync', payload)
+    }
+    if (method === RPC.PROFILE_BANNER_EXPORT_CSV_SYNC) {
+      this.emit('profile-banner-export-csv-sync', payload)
+    }
     if (method === RPC.MESSAGE_SEARCH_REQUEST) {
       this.emit('message-search-request', payload)
     }
@@ -982,6 +988,14 @@ class PearcordGuild extends EventEmitter {
       this.emit('guild-widget-export-csv-sync', payload)
       return
     }
+    if (method === RPC.ACTIVITY_INVITE_CSV_SYNC) {
+      this.emit('activity-invite-csv-sync', payload)
+      return
+    }
+    if (method === RPC.PROFILE_BANNER_EXPORT_CSV_SYNC) {
+      this.emit('profile-banner-export-csv-sync', payload)
+      return
+    }
     if (method === RPC.AUDIT_EXPORT_ARCHIVE) {
       this.emit('audit-export-archive', payload)
       return
@@ -1399,6 +1413,14 @@ class PearcordGuild extends EventEmitter {
     broadcastGossip(this, RPC.GUILD_WIDGET_EXPORT_CSV_SYNC, payload)
   }
 
+  gossipActivityInviteCsvSync (payload) {
+    broadcastGossip(this, RPC.ACTIVITY_INVITE_CSV_SYNC, payload)
+  }
+
+  gossipProfileBannerExportCsvSync (payload) {
+    broadcastGossip(this, RPC.PROFILE_BANNER_EXPORT_CSV_SYNC, payload)
+  }
+
   gossipAuditExportArchive (payload) {
     broadcastGossip(this, RPC.AUDIT_EXPORT_ARCHIVE, payload)
   }