feat: add performance insights feature with toggle in settings and conditional rendering in dashboard pages

app/share/[id]/page.tsx

@@ -271,8 +271,8 @@ export default function PublicDashboardPage() {
           />
         </div>
 
-         {/* Performance Stats */}
-        {performance && (
+         {/* Performance Stats - Only show if enabled */}
+        {performance && data.site?.enable_performance_insights && (
            <div className="mb-8">
             <PerformanceStats stats={performance} />
           </div>

app/sites/[id]/page.tsx

@@ -228,10 +228,12 @@ export default function SiteDashboardPage() {
         />
       </div>
 
-      {/* Performance Stats */}
-      <div className="mb-8">
-        <PerformanceStats stats={performance} />
-      </div>
+      {/* Performance Stats - Only show if enabled */}
+      {site.enable_performance_insights && (
+        <div className="mb-8">
+          <PerformanceStats stats={performance} />
+        </div>
+      )}
 
       <div className="grid gap-6 lg:grid-cols-2 mb-8">
         <ContentStats

app/sites/[id]/settings/page.tsx

@@ -71,6 +71,8 @@ export default function SiteSettingsPage() {
     collect_device_info: true,
     collect_geo_data: 'full' as GeoDataLevel,
     collect_screen_resolution: true,
+    // Performance insights setting
+    enable_performance_insights: false,
     // Session replay settings
     replay_mode: 'disabled' as ReplayMode,
     replay_sampling_rate: 100,
@@ -104,6 +106,8 @@ export default function SiteSettingsPage() {
         collect_device_info: data.collect_device_info ?? true,
         collect_geo_data: data.collect_geo_data || 'full',
         collect_screen_resolution: data.collect_screen_resolution ?? true,
+        // Performance insights setting (default to false)
+        enable_performance_insights: data.enable_performance_insights ?? false,
         // Session replay settings (legacy consent_required from API mapped to anonymous_skeleton)
         replay_mode: ((data as { replay_mode?: string }).replay_mode === 'consent_required' ? 'anonymous_skeleton' : data.replay_mode) || 'disabled',
         replay_sampling_rate: snapSamplingRate(data.replay_sampling_rate ?? 100),
@@ -146,6 +150,8 @@ export default function SiteSettingsPage() {
         collect_device_info: formData.collect_device_info,
         collect_geo_data: formData.collect_geo_data,
         collect_screen_resolution: formData.collect_screen_resolution,
+        // Performance insights setting
+        enable_performance_insights: formData.enable_performance_insights,
         // Session replay settings
         replay_mode: formData.replay_mode,
         replay_sampling_rate: formData.replay_sampling_rate,
@@ -685,6 +691,30 @@ export default function SiteSettingsPage() {
                     </div>
                   </div>
 
+                  {/* Performance Insights Toggle */}
+                  <div className="space-y-4 pt-6 border-t border-neutral-100 dark:border-neutral-800">
+                    <h3 className="text-sm font-medium text-neutral-700 dark:text-neutral-300">Performance Insights</h3>
+                    <div className="p-4 bg-neutral-50 dark:bg-neutral-900/50 rounded-xl border border-neutral-100 dark:border-neutral-800">
+                      <div className="flex items-center justify-between">
+                        <div>
+                          <h4 className="font-medium text-neutral-900 dark:text-white">Performance Insights (Add-on)</h4>
+                          <p className="text-sm text-neutral-500 dark:text-neutral-400 mt-0.5">
+                            Track Core Web Vitals (LCP, CLS, INP) to monitor site performance
+                          </p>
+                        </div>
+                        <label className="relative inline-flex items-center cursor-pointer">
+                          <input
+                            type="checkbox"
+                            checked={formData.enable_performance_insights}
+                            onChange={(e) => setFormData({ ...formData, enable_performance_insights: e.target.checked })}
+                            className="sr-only peer"
+                          />
+                          <div className="w-11 h-6 bg-neutral-200 peer-focus:outline-none peer-focus:ring-4 peer-focus:ring-brand-orange/20 dark:peer-focus:ring-brand-orange/20 rounded-full peer dark:bg-neutral-700 peer-checked:after:translate-x-full peer-checked:after:border-white after:content-[''] after:absolute after:top-[2px] after:left-[2px] after:bg-white after:border-gray-300 after:border after:rounded-full after:h-5 after:w-5 after:transition-all dark:border-gray-600 peer-checked:bg-brand-orange"></div>
+                        </label>
+                      </div>
+                    </div>
+                  </div>
+
                   {/* Excluded Paths */}
                   <div className="space-y-4 pt-6 border-t border-neutral-100 dark:border-neutral-800">
                     <h3 className="text-sm font-medium text-neutral-700 dark:text-neutral-300">Path Filtering</h3>

lib/api/sites.ts

@@ -18,6 +18,8 @@ export interface Site {
   collect_device_info?: boolean
   collect_geo_data?: GeoDataLevel
   collect_screen_resolution?: boolean
+  // Performance insights setting
+  enable_performance_insights?: boolean
   // Session replay settings
   replay_mode?: ReplayMode
   replay_sampling_rate?: number
@@ -46,6 +48,8 @@ export interface UpdateSiteRequest {
   collect_device_info?: boolean
   collect_geo_data?: GeoDataLevel
   collect_screen_resolution?: boolean
+  // Performance insights setting
+  enable_performance_insights?: boolean
   // Session replay settings
   replay_mode?: ReplayMode
   replay_sampling_rate?: number

public/script.js

@@ -24,6 +24,7 @@
   // * Performance Monitoring (Core Web Vitals) State
   let currentEventId = null;
   let metrics = { lcp: 0, cls: 0, inp: 0 };
+  let performanceInsightsEnabled = false;
 
   // * Session Replay State
   let replayEnabled = false;
@@ -74,7 +75,8 @@
   }
 
   function sendMetrics() {
-    if (!currentEventId || (metrics.lcp === 0 && metrics.cls === 0 && metrics.inp === 0)) return;
+    // * Only send metrics if performance insights are enabled
+    if (!performanceInsightsEnabled || !currentEventId || (metrics.lcp === 0 && metrics.cls === 0 && metrics.inp === 0)) return;
 
     // * Use sendBeacon if available for reliability on unload
     const data = JSON.stringify({
@@ -96,7 +98,8 @@
     }
   }
 
-  // * Start observing immediately
+  // * Start observing metrics immediately (buffered observers will capture early metrics)
+  // * Metrics will only be sent if performance insights are enabled (checked in sendMetrics)
   observeMetrics();
 
   // * Send metrics when user leaves or hides the page
@@ -214,6 +217,9 @@
       if (res.ok) {
         replaySettings = await res.json();
         replayMode = replaySettings.replay_mode;
+        
+        // * Set performance insights enabled flag
+        performanceInsightsEnabled = replaySettings.enable_performance_insights === true;
 
         // Check sampling rate
         if (replayMode !== 'disabled') {