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/page.tsx

@@ -4,16 +4,20 @@ import { Tools } from "./components/Tools";
 import { Blog } from "./components/Blog";
 import { About } from "./components/About";
 import { Newsletter } from "./components/Newsletter";
+import { Footer } from "./components/Footer";
 
 export default function Home() {
   return (
-    <main className="flex flex-col flex-1">
-      <Hero />
-      <Divider />
-      <Tools />
-      <Blog />
-      <About />
-      <Newsletter />
-    </main>
+    <>
+      <main className="flex flex-col flex-1">
+        <Hero />
+        <Divider />
+        <Tools />
+        <Blog />
+        <About />
+        <Newsletter />
+      </main>
+      <Footer />
+    </>
   );
 }