fix utm unicode

src/components/analytics/AnalyticsScripts.tsx

@@ -30,14 +30,16 @@ export function AnalyticsScripts({ data, externalId }: AnalyticsScriptsProps) {
   const googleAnalyticsIds = data?.google_analytics || [];
   const yandexMetrikaIds = data?.yandex_metrica || [];
   
-  // Track which pixels have been initialized with external_id
+  // Track which pixels have been initialized (basic init)
   const initializedPixelsRef = useRef<Set<string>>(new Set());
+  // Track which pixels have been enhanced with external_id
+  const enhancedPixelsRef = useRef<Set<string>>(new Set());
   
-  // Initialize FB Pixel when externalId becomes available
+  // Initialize FB Pixel immediately when SDK is ready
+  // external_id is OPTIONAL - we must not block tracking for users without fingerprint
   useEffect(() => {
-    if (!externalId || facebookPixels.length === 0) return;
+    if (facebookPixels.length === 0) return;
     
-    // Wait for fbq to be available
     const initPixels = () => {
       if (!window.fbq) {
         // SDK not loaded yet, retry in 100ms
@@ -48,20 +50,44 @@ export function AnalyticsScripts({ data, externalId }: AnalyticsScriptsProps) {
       facebookPixels.forEach((pixelId) => {
         if (initializedPixelsRef.current.has(pixelId)) return;
         
-        window.fbq!("init", pixelId, { external_id: externalId });
+        // Initialize with external_id if available, otherwise without
+        // This ensures ALL users get tracked, not just those with fingerprint
+        if (externalId) {
+          window.fbq!("init", pixelId, { external_id: externalId });
+          enhancedPixelsRef.current.add(pixelId);
+        } else {
+          window.fbq!("init", pixelId);
+        }
+        
         window.fbq!("track", "PageView");
         initializedPixelsRef.current.add(pixelId);
       });
     };
     
     initPixels();
+  }, [facebookPixels, externalId]);
+  
+  // Enhance already-initialized pixels with external_id when it becomes available later
+  // This improves matching for Conversions API deduplication
+  useEffect(() => {
+    if (!externalId || facebookPixels.length === 0) return;
+    if (!window.fbq) return;
+    
+    facebookPixels.forEach((pixelId) => {
+      // Only enhance if pixel was initialized but not yet enhanced with external_id
+      if (initializedPixelsRef.current.has(pixelId) && !enhancedPixelsRef.current.has(pixelId)) {
+        // Re-init with external_id for better matching (doesn't fire PageView again)
+        window.fbq!("init", pixelId, { external_id: externalId });
+        enhancedPixelsRef.current.add(pixelId);
+      }
+    });
   }, [externalId, facebookPixels]);
   
   if (!data) return null;
 
   return (
     <>
-      {/* Facebook Pixel SDK - loads immediately, init happens in useEffect when externalId ready */}
+      {/* Facebook Pixel SDK - loads immediately, init happens in useEffect (with or without externalId) */}
       {facebookPixels.length > 0 && (
         <Script
           id="fb-pixel-sdk"

src/shared/utils/url.ts

@@ -65,17 +65,30 @@ export const getCurrentQueryParams = (): Record<string, string> => {
   return utmParams;
 };
 
+/**
+ * Convert bytes to base64 string (handles UTF-8 properly)
+ * MDN recommended approach: https://developer.mozilla.org/en-US/docs/Web/API/Window/btoa#unicode_strings
+ */
+const bytesToBase64 = (bytes: Uint8Array): string => {
+  const binString = Array.from(bytes, (byte) =>
+    String.fromCodePoint(byte)
+  ).join("");
+  return btoa(binString);
+};
+
 /**
  * Encode params as base64 JSON for state parameter
- * Uses URL-safe base64 encoding
+ * Uses URL-safe base64 encoding with UTF-8 support
+ * Handles Unicode characters (e.g., utm_campaign=夏セール)
  */
 export const encodeStateParam = (params: Record<string, string>): string => {
   if (Object.keys(params).length === 0) return "";
 
   try {
     const json = JSON.stringify(params);
-    // Use btoa for base64, replace unsafe chars for URL
+    // Encode string as UTF-8 bytes, then convert to base64
-    const base64 = btoa(json)
+    const bytes = new TextEncoder().encode(json);
+    const base64 = bytesToBase64(bytes)
       .replace(/\+/g, "-")
       .replace(/\//g, "_")
       .replace(/=+$/, "");