Wire remove-guild-emoji and remove-guild-sticker IPC handlers.

Completes Phase 431 delete path from UI and agentctl scenarios.

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

index.js

@@ -1076,6 +1076,11 @@ async function dispatchUiMessage (platform, msg, hooks = {}) {
     pushState()
     return true
   }
+  if (t === 'remove-guild-emoji') {
+    await platform.removeGuildEmoji(msg.name)
+    pushState()
+    return true
+  }
   if (t === 'upsert-guild-sticker') {
     await platform.upsertGuildSticker({
       name: msg.name,
@@ -1104,6 +1109,11 @@ async function dispatchUiMessage (platform, msg, hooks = {}) {
     pushState()
     return true
   }
+  if (t === 'remove-guild-sticker') {
+    await platform.removeGuildSticker(msg.name)
+    pushState()
+    return true
+  }
   if (t === 'upsert-guild-sound') {
     await platform.upsertGuildSound({
       name: msg.name,