feat(v0.8.670): slash registry CSV and invoke audit mesh parity

Implement Phase 695 signed slash command registry CSV and slash invoke
audit export across delivery-receipts, platform gossip (RPC 108/109),
slash-csv-ui modal, agentctl journeys, and test:ci-phase695 regression.

Also backfill relay/worker CSV styles missing from pearcord.css and bump
phase687 boot gate to 0.8.670 for RELEASE_CI continuity.

index.js

@@ -2594,6 +2594,45 @@ async function dispatchUiMessage (platform, msg, hooks = {}) {
     }
     return true
   }
+  if (t === 'slash-csv-modal-open') {
+    pushState()
+    send({ type: 'slash-csv-modal-opened' })
+    return true
+  }
+  if (t === 'sync-slash-registry-csv') {
+    const out = await platform.pushSlashRegistryCsvToMesh()
+    pushState()
+    send({ type: 'slash-registry-csv-synced', ...out })
+    if (platform.mode === 'guild' && platform.activeChannelId) {
+      send({
+        type: 'composer-focus-channel',
+        channelId: platform.activeChannelId
+      })
+    }
+    return true
+  }
+  if (t === 'clear-slash-registry-csv') {
+    await platform.clearSlashRegistryCsvExports()
+    pushState()
+    if (platform.mode === 'guild' && platform.activeChannelId) {
+      send({
+        type: 'composer-focus-channel',
+        channelId: platform.activeChannelId
+      })
+    }
+    return true
+  }
+  if (t === 'push-slash-invoke-audit-export-csv') {
+    await platform.pushSlashInvokeAuditExportToMesh()
+    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()