feat: complete Week 1 frontend setup (#9 #10 #11 #12)

- Install and configure Tailwind CSS (#9)
- Install Nuxt UI component library (#10)
- Create app layout with header/footer components (#11)
- Implement Supabase client composable (#12)
- Add TypeScript database types
- Create placeholder pages (index, scan, settings)
- Setup responsive navigation with mobile menu
- Configure auth state management

All Week 1 frontend foundation tasks complete.

app/components/AppFooter.vue

@@ -0,0 +1,40 @@
+<template>
+  <footer class="bg-white border-t border-gray-200 mt-auto">
+    <div class="container mx-auto px-4 py-6 max-w-7xl">
+      <div class="flex flex-col md:flex-row items-center justify-between gap-4">
+        <!-- Copyright -->
+        <p class="text-sm text-gray-600">
+          © {{ currentYear }} Pantry. Self-hosted inventory management.
+        </p>
+
+        <!-- Links -->
+        <div class="flex items-center space-x-6">
+          <a 
+            href="https://github.com/pantry-app/pantry" 
+            target="_blank" 
+            rel="noopener noreferrer"
+            class="text-sm text-gray-600 hover:text-primary transition-colors"
+          >
+            GitHub
+          </a>
+          <NuxtLink 
+            to="/about" 
+            class="text-sm text-gray-600 hover:text-primary transition-colors"
+          >
+            About
+          </NuxtLink>
+          <NuxtLink 
+            to="/privacy" 
+            class="text-sm text-gray-600 hover:text-primary transition-colors"
+          >
+            Privacy
+          </NuxtLink>
+        </div>
+      </div>
+    </div>
+  </footer>
+</template>
+
+<script setup lang="ts">
+const currentYear = new Date().getFullYear()
+</script>