Task 8.1: Create public layout with minimal structure (shared fonts/theme, no sidebar)

- Create src/app/(public)/layout.tsx as route group for public pages
- Inherits font variables and theme from root layout via middleware
- No sidebar, nav bar, or protected components in public layout
- Marked task 8.1 complete in tasks.md

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

src/app/(public)/layout.tsx

@@ -0,0 +1,14 @@
+import type { Metadata } from "next";
+
+export const metadata: Metadata = {
+  title: "Candle Annotator",
+  description: "Annotate candlestick charts for ML training",
+};
+
+export default function PublicLayout({
+  children,
+}: Readonly<{
+  children: React.ReactNode;
+}>) {
+  return children;
+}