refactor: extract frustration tracking into separate add-on script

Move rage click and dead click detection (35% of script.js) into
script.frustration.js as an optional add-on. Core script drops from
8.1KB to 5.7KB gzipped. Add-on auto-discovers core via window.pulse
polling and supports opt-out via data-no-rage/data-no-dead attributes.

- Expose cleanPath on window.pulse for add-on consumption
- Add script.frustration.js to middleware PUBLIC_ROUTES
- Update integration guides, ScriptSetupBlock, and FrustrationTable
  empty state to reference the add-on script

components/IntegrationGuide.tsx

@@ -67,6 +67,18 @@ export function IntegrationGuide({ integration, children }: IntegrationGuideProp
 
         <div className="prose prose-neutral dark:prose-invert max-w-none">
           {children}
+
+          <hr className="my-8 border-neutral-200 dark:border-neutral-800" />
+          <h3>Optional: Frustration Tracking</h3>
+          <p>
+            Detect rage clicks and dead clicks by adding the frustration tracking
+            add-on after the core script:
+          </p>
+          <pre><code>{`<script defer src="https://pulse.ciphera.net/script.frustration.js"></script>`}</code></pre>
+          <p>
+            No extra configuration needed. Add <code>data-no-rage</code> or{' '}
+            <code>data-no-dead</code> to disable individual signals.
+          </p>
         </div>
 
         {/* * --- Related Integrations --- */}

components/behavior/FrustrationTable.tsx

@@ -184,8 +184,11 @@ export default function FrustrationTable({
                 No {title.toLowerCase()} detected
               </h4>
               <p className="text-sm text-neutral-500 dark:text-neutral-400 max-w-md">
-                {description}. Data will appear here once frustration signals are detected on your site.
+                Frustration tracking requires the add-on script. Add it after your core Pulse script:
               </p>
+              <code className="text-xs bg-neutral-100 dark:bg-neutral-800 text-neutral-700 dark:text-neutral-300 px-3 py-2 rounded-lg font-mono break-all">
+                {'<script defer src="https://pulse.ciphera.net/script.frustration.js"></script>'}
+              </code>
             </div>
           )}
         </div>

components/sites/ScriptSetupBlock.tsx

@@ -92,6 +92,9 @@ export default function ScriptSetupBlock({
         <p className="mt-2 text-xs text-neutral-500 dark:text-neutral-400">
           Default: cross-tab (localStorage). Optional: <code className="rounded px-1 bg-neutral-200 dark:bg-neutral-700">data-storage=&quot;session&quot;</code> to opt out (per-tab, ephemeral). Optional: <code className="rounded px-1 bg-neutral-200 dark:bg-neutral-700">data-storage-ttl=&quot;48&quot;</code> to set expiry in hours (default: 24).
         </p>
+        <p className="mt-1.5 text-xs text-neutral-500 dark:text-neutral-400">
+          Optional: add <code className="rounded px-1 bg-neutral-200 dark:bg-neutral-700">{`<script defer src="${APP_URL}/script.frustration.js"></script>`}</code> for rage click and dead click detection.
+        </p>
         <button
           type="button"
           onClick={copyScript}