chore(ui): format ProvisioningChatView + add Cerebras API key note to wrangler.toml

- ProvisioningChatView.tsx: destructure useProvisioningChat return inline (prettier)
- useProvisioningChat.ts: collapse multi-line string literal
- wrangler.toml: add CEREBRAS_API_KEY comment for ultra-fast provisioning inference

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: lalalune

cloud/apps/api/wrangler.toml

@@ -154,6 +154,7 @@ TUNNEL_AUTH_KEY_COST_USD = "0.01"
 #   OPENAI_API_KEY                     OpenAI direct
 #   AI_GATEWAY_API_KEY
 #   GROQ_API_KEY                       Groq
+#   CEREBRAS_API_KEY                   Cerebras — ultra-fast inference for provisioning placeholder agent
 #   FAL_KEY                            Fal.ai video gen
 #   ELEVENLABS_API_KEY                 ElevenLabs TTS
 #   VAST_API_KEY                       Vast.ai Serverless endpoint API token (Bearer)

packages/ui/src/components/shell/ProvisioningChatView.tsx

@@ -42,7 +42,8 @@ export function ProvisioningChatView({
   const onContainerReadyRef = React.useRef(onContainerReady);
   onContainerReadyRef.current = onContainerReady;
 
-  // Scroll to bottom whenever messages change.
+  // Scroll to bottom whenever messages change. `messages` is a trigger dep.
+  // biome-ignore lint/correctness/useExhaustiveDependencies: messages triggers scroll-to-bottom
   React.useEffect(() => {
     messagesEndRef.current?.scrollIntoView({ behavior: "smooth" });
   }, [messages]);