refactor(analytics): abstract analytics into provider pattern

- Add type-safe AnalyticsEvent union types
- Create AnalyticsProvider interface for pluggable analytics backends
- Implement OpenPanelProvider and RybbitProvider adapters
- Create AnalyticsTracker that fans out events to all providers
- Simplifies adding new analytics platforms in the future

src/lib/analytics/hooks/useAnalytics.ts

@@ -0,0 +1,28 @@
+"use client";
+
+import { useEffect, useRef, useState } from "react";
+import { useOpenPanel } from "@openpanel/nextjs";
+import { getTracker, AnalyticsTracker } from "../core/AnalyticsTracker";
+import { OpenPanelProvider } from "../providers/OpenPanelProvider";
+import { RybbitProvider } from "../providers/RybbitProvider";
+
+let initialized = false;
+
+export function useAnalytics(): AnalyticsTracker {
+  const op = useOpenPanel();
+  const [isReady, setIsReady] = useState(false);
+  const trackerRef = useRef<AnalyticsTracker | null>(null);
+
+  useEffect(() => {
+    if (!initialized) {
+      const tracker = getTracker();
+      tracker.addProvider(new OpenPanelProvider(op));
+      tracker.addProvider(new RybbitProvider());
+      trackerRef.current = tracker;
+      initialized = true;
+      setIsReady(true);
+    }
+  }, [op]);
+
+  return trackerRef.current || getTracker();
+}