fix: namespace rate limit buckets per endpoint, remove custom analytics

- Add `prefix` param to checkRateLimit/getRateLimitHeaders so each endpoint
  has its own bucket (previously all shared `admin_${ip}`, causing 429s when
  analytics/track incremented past n8n endpoints' lower limits)
- n8n/hardcover/currently-reading → prefix 'n8n-reading'
- n8n/status → prefix 'n8n-status'
- analytics/track → prefix 'analytics-track'
- Remove custom analytics system (AnalyticsProvider, lib/analytics,
  lib/useWebVitals, all /api/analytics/* routes) — was causing 500s in
  production due to missing PostgreSQL PageView table
- Remove analytics consent toggle from ConsentBanner/ConsentProvider

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/components/ClientProviders.tsx

@@ -5,8 +5,7 @@ import { usePathname } from "next/navigation";
 import dynamic from "next/dynamic";
 import { ToastProvider } from "@/components/Toast";
 import ErrorBoundary from "@/components/ErrorBoundary";
-import { AnalyticsProvider } from "@/components/AnalyticsProvider";
-import { ConsentProvider, useConsent } from "./ConsentProvider";
+import { ConsentProvider } from "./ConsentProvider";
 import { ThemeProvider } from "./ThemeProvider";
 import { motion, AnimatePresence } from "framer-motion";
 
@@ -97,12 +96,7 @@ function GatedProviders({
   mounted: boolean;
   is404Page: boolean;
 }) {
-  const { consent } = useConsent();
-
-  // If consent is not decided yet, treat optional features as off
-  const analyticsEnabled = !!consent?.analytics;
-
-  const content = (
+  return (
     <ErrorBoundary>
       <ToastProvider>
         {mounted && <BackgroundBlobs />}
@@ -110,6 +104,4 @@ function GatedProviders({
       </ToastProvider>
     </ErrorBoundary>
   );
-
-  return analyticsEnabled ? <AnalyticsProvider>{content}</AnalyticsProvider> : content;
 }

app/components/ConsentBanner.tsx

@@ -6,7 +6,7 @@ import { useTranslations } from "next-intl";
 
 export default function ConsentBanner() {
   const { consent, ready, setConsent } = useConsent();
-  const [draft, setDraft] = useState<ConsentState>({ analytics: false, chat: false });
+  const [draft, setDraft] = useState<ConsentState>({ chat: false });
   const [minimized, setMinimized] = useState(false);
   const t = useTranslations("consent");
 
@@ -19,7 +19,6 @@ export default function ConsentBanner() {
     title: t("title"),
     description: t("description"),
     essential: t("essential"),
-    analytics: t("analytics"),
     chat: t("chat"),
     alwaysOn: t("alwaysOn"),
     acceptAll: t("acceptAll"),
@@ -68,16 +67,6 @@ export default function ConsentBanner() {
             <div className="text-[11px] text-stone-500">{s.alwaysOn}</div>
           </div>
 
-          <label className="flex items-center justify-between gap-3 py-1">
-            <span className="text-sm font-semibold text-stone-800">{s.analytics}</span>
-            <input
-              type="checkbox"
-              checked={draft.analytics}
-              onChange={(e) => setDraft((p) => ({ ...p, analytics: e.target.checked }))}
-              className="w-4 h-4 accent-stone-900"
-            />
-          </label>
-
           <label className="flex items-center justify-between gap-3 py-1">
             <span className="text-sm font-semibold text-stone-800">{s.chat}</span>
             <input
@@ -91,7 +80,7 @@ export default function ConsentBanner() {
 
         <div className="mt-3 flex flex-col gap-2">
           <button
-            onClick={() => setConsent({ analytics: true, chat: true })}
+            onClick={() => setConsent({ chat: true })}
             className="px-4 py-2 rounded-xl bg-stone-900 text-stone-50 font-semibold hover:bg-stone-800 transition-colors"
           >
             {s.acceptAll}
@@ -103,7 +92,7 @@ export default function ConsentBanner() {
             {s.acceptSelected}
           </button>
           <button
-            onClick={() => setConsent({ analytics: false, chat: false })}
+            onClick={() => setConsent({ chat: false })}
             className="px-4 py-2 rounded-xl bg-transparent text-stone-600 font-semibold hover:text-stone-900 transition-colors"
           >
             {s.rejectAll}

app/components/ConsentProvider.tsx

@@ -3,7 +3,6 @@
 import React, { createContext, useCallback, useContext, useEffect, useMemo, useState } from "react";
 
 export type ConsentState = {
-  analytics: boolean;
   chat: boolean;
 };
 
@@ -20,7 +19,6 @@ function readConsentFromCookie(): ConsentState | null {
   try {
     const parsed = JSON.parse(value) as Partial<ConsentState>;
     return {
-      analytics: !!parsed.analytics,
       chat: !!parsed.chat,
     };
   } catch {

app/components/RootProviders.tsx

@@ -2,13 +2,6 @@
 
 import React, { useEffect, useState } from "react";
 
-// Lazy load providers to avoid webpack module resolution issues
-const AnalyticsProvider = React.lazy(() =>
-  import("@/components/AnalyticsProvider").then((mod) => ({
-    default: mod.AnalyticsProvider,
-  }))
-);
-
 const ToastProvider = React.lazy(() =>
   import("@/components/Toast").then((mod) => ({
     default: mod.ToastProvider,
@@ -38,14 +31,11 @@ export default function RootProviders({
 
   return (
     <React.Suspense fallback={<div className="relative z-10">{children}</div>}>
-      <AnalyticsProvider>
-        <ToastProvider>
-          <BackgroundBlobs />
-          <div className="relative z-10">{children}</div>
-          <ChatWidget />
-        </ToastProvider>
-      </AnalyticsProvider>
+      <ToastProvider>
+        <BackgroundBlobs />
+        <div className="relative z-10">{children}</div>
+        <ChatWidget />
+      </ToastProvider>
     </React.Suspense>
   );
 }
-