feat: Phase 1 WP integration — API proxy, Store, Freebies, Blog, Tools pages

- Add WP REST API proxy (/api/wp/[...path])
- Add Store page ( from Gumroad/Stripe)
- Add Freebies page (WP content via REST API)
- Add Blog page (WP posts via REST API)
- Add Tools page (index of Islamic tools)
- Add public nav entries in BottomNav
- No WP modifications — all server-side

Docs: https://git.falahos.my/falah-os/war-room/wiki/UI-UX-Audit-mobile.falahos.my

src/app/store/loading.tsx

@@ -0,0 +1,7 @@
+export default function Loading() {
+  return (
+    <div className="min-h-dvh bg-[#0a0a0f] flex items-center justify-center">
+      <div className="w-8 h-8 rounded-full border-2 border-[#D4AF37]/30 border-t-[#D4AF37] animate-spin" />
+    </div>
+  );
+}