feat(analytics): complete Rybbit tracking integration

- Add Rybbit server-side tracking to analytics-server.ts for order completion and revenue
- Add trackNewsletterSignup to analytics.ts and wire up NewsletterSection
- Add cart tracking to CartDrawer (cart view, remove from cart)
- All ecommerce events now track to both OpenPanel and Rybbit

src/components/cart/CartDrawer.tsx

@@ -8,6 +8,7 @@ import { X, Minus, Plus, Trash2, ShoppingBag } from "lucide-react";
 import { useTranslations, useLocale } from "next-intl";
 import { useSaleorCheckoutStore } from "@/stores/saleorCheckoutStore";
 import { formatPrice } from "@/lib/saleor";
+import { useAnalytics } from "@/lib/analytics";
 
 export default function CartDrawer() {
   const t = useTranslations("Cart");
@@ -26,11 +27,13 @@ export default function CartDrawer() {
     initCheckout,
     clearError,
   } = useSaleorCheckoutStore();
+  const { trackCartView, trackRemoveFromCart } = useAnalytics();
 
   const lines = getLines();
   const total = getTotal();
   const lineCount = getLineCount();
   const initializedRef = useRef(false);
+  const lastCartStateRef = useRef<{ count: number; total: number } | null>(null);
 
   useEffect(() => {
     if (!initializedRef.current && locale) {
@@ -52,6 +55,22 @@ export default function CartDrawer() {
     };
   }, [isOpen]);
 
+  useEffect(() => {
+    if (isOpen && lines.length > 0) {
+      const currentState = { count: lineCount, total };
+      if (!lastCartStateRef.current || 
+          lastCartStateRef.current.count !== currentState.count ||
+          lastCartStateRef.current.total !== currentState.total) {
+        trackCartView({
+          total,
+          currency: checkout?.totalPrice?.gross?.currency || "RSD",
+          item_count: lineCount,
+        });
+        lastCartStateRef.current = currentState;
+      }
+    }
+  }, [isOpen, lineCount, total]);
+
   return (
     <AnimatePresence>
       {isOpen && (
@@ -181,7 +200,14 @@ export default function CartDrawer() {
                           </div>
 
                           <button
-                            onClick={() => removeLine(line.id)}
+                            onClick={() => {
+                              trackRemoveFromCart({
+                                id: line.variant.product.id,
+                                name: line.variant.product.name,
+                                quantity: line.quantity,
+                              });
+                              removeLine(line.id);
+                            }}
                             disabled={isLoading}
                             className="p-2 text-[#999999] hover:text-red-500 transition-colors"
                             aria-label={t("removeItem")}

src/components/home/NewsletterSection.tsx

@@ -4,14 +4,17 @@ import { motion } from "framer-motion";
 import { useState } from "react";
 import { useTranslations } from "next-intl";
 import { ArrowRight } from "lucide-react";
+import { useAnalytics } from "@/lib/analytics";
 
 export default function NewsletterSection() {
   const t = useTranslations("Newsletter");
   const [email, setEmail] = useState("");
   const [status, setStatus] = useState<"idle" | "success" | "error">("idle");
+  const { trackNewsletterSignup } = useAnalytics();
 
   const handleSubmit = (e: React.FormEvent) => {
     e.preventDefault();
+    trackNewsletterSignup(email, "footer");
     setStatus("success");
     setEmail("");
   };