feat(Footer): add footer with 3px divider, logo, social handle, and legal links

Dark bg (#111). Top divider is a 3px div in #30302c (not a CSS border).
Three justify-between columns: Lora SemiBold logo with gold period (#fdb705),
Lora Regular @handle centered (added weight 400 to Lora config), Inter 14px
legal links with gap-6. Footer sits outside <main> so mt-auto pushes it down.

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

app/layout.tsx

@@ -28,7 +28,7 @@ const caveat = Caveat({
 const lora = Lora({
   variable: "--font-lora",
   subsets: ["latin"],
-  weight: ["600"],
+  weight: ["400", "600"],
 });
 
 export const metadata: Metadata = {