Story 18: Token-by-token streaming responses

- Backend: Added OllamaProvider::chat_stream() with newline-delimited JSON parsing
- Backend: Emit chat:token events for each token received from Ollama
- Backend: Added futures dependency and stream feature for reqwest
- Frontend: Added streamingContent state and chat:token event listener
- Frontend: Real-time token display with auto-scroll
- Frontend: Markdown and syntax highlighting support for streaming content
- Fixed all TypeScript errors (tsc --noEmit)
- Fixed all Biome warnings and errors
- Fixed all Clippy warnings
- Added comprehensive code quality documentation
- Added tsc --noEmit to verification checklist

Tested and verified:
- Tokens stream in real-time
- Auto-scroll works during streaming
- Tool calls interrupt streaming correctly
- Multi-turn conversations work
- Smooth performance with no lag

src/main.tsx

@@ -3,7 +3,7 @@ import ReactDOM from "react-dom/client";
 import App from "./App";
 
 ReactDOM.createRoot(document.getElementById("root") as HTMLElement).render(
-  <React.StrictMode>
-    <App />
-  </React.StrictMode>,
+	<React.StrictMode>
+		<App />
+	</React.StrictMode>,
 );