feat(v0.8.672): Phase 697 invite link CSV and vanity URL mesh parity

Signed invite link CSV (listGuildInvites) and vanity URL export mesh follow
the OAuth/slash CSV pattern: invite-csv-ui, invite-csv-mixin, delivery-receipts
collections, guild gossip RPC 112/113, ui-flow IPC, deep link ?invite-csv=1,
invite-errors filter, and agentctl invite + vanity journeys.

Repairs app.js bot/slash/oauth modal corruption from prior session. Adds
test:ci-phase697, docs INVITE_LINK_CSV.md, RELEASE_v0.8.672, and Phase 698 roadmap.

index.js

@@ -2672,6 +2672,45 @@ async function dispatchUiMessage (platform, msg, hooks = {}) {
     }
     return true
   }
+  if (t === 'invite-csv-modal-open') {
+    pushState()
+    send({ type: 'invite-csv-modal-opened' })
+    return true
+  }
+  if (t === 'sync-invite-link-csv') {
+    const out = await platform.pushInviteLinkCsvToMesh()
+    pushState()
+    send({ type: 'invite-link-csv-synced', ...out })
+    if (platform.mode === 'guild' && platform.activeChannelId) {
+      send({
+        type: 'composer-focus-channel',
+        channelId: platform.activeChannelId
+      })
+    }
+    return true
+  }
+  if (t === 'clear-invite-link-csv') {
+    await platform.clearInviteLinkCsvExports()
+    pushState()
+    if (platform.mode === 'guild' && platform.activeChannelId) {
+      send({
+        type: 'composer-focus-channel',
+        channelId: platform.activeChannelId
+      })
+    }
+    return true
+  }
+  if (t === 'push-vanity-url-export-csv') {
+    await platform.pushVanityUrlExportToMesh()
+    pushState()
+    if (platform.mode === 'guild' && platform.activeChannelId) {
+      send({
+        type: 'composer-focus-channel',
+        channelId: platform.activeChannelId
+      })
+    }
+    return true
+  }
   if (t === 'clear-mod-digest-notify') {
     await platform.clearModDigestNotifyPrefs()
     pushState()