Add ad blocker warning and platform labels to setup wizard

- Warning to disable ad blockers before saving pages for import
- Listed supported platforms with what each extracts (Toast, Grubhub,
  DoorDash, Uber Eats, and fallback AI extraction)

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

portal/setup-wizard.html

@@ -851,7 +851,14 @@
                     Import Menu
                   </button>
                 </div>
-                <p style="margin:16px 0 0;color:var(--gray-400);font-size:12px;">Works with most restaurant websites, Uber Eats, DoorDash, Grubhub, Toast, Square, and more</p>
+                <div style="margin:16px auto 0;max-width:440px;text-align:left;font-size:12px;color:var(--gray-400);">
+                  <p style="margin:0 0 6px;font-weight:600;color:var(--gray-500);">Supported platforms:</p>
+                  <p style="margin:0 0 2px;"><strong style="color:var(--gray-500);">Toast</strong> — full menu with modifiers &amp; images (URL or saved page)</p>
+                  <p style="margin:0 0 2px;"><strong style="color:var(--gray-500);">Grubhub</strong> — full menu with modifiers (URL only)</p>
+                  <p style="margin:0 0 2px;"><strong style="color:var(--gray-500);">DoorDash / order.online</strong> — items, categories, prices (URL or saved page)</p>
+                  <p style="margin:0 0 2px;"><strong style="color:var(--gray-500);">Uber Eats</strong> — items, categories, prices (URL or saved page)</p>
+                  <p style="margin:0;"><strong style="color:var(--gray-500);">Other sites</strong> — upload saved page, images, or PDFs for AI extraction</p>
+                </div>
 
                 <!-- Divider -->
                 <div style="display:flex;align-items:center;margin:24px 0;gap:16px;">
@@ -861,7 +868,8 @@
                 </div>
 
                 <!-- Saved Page Upload -->
-                <p style="margin:0 0 12px;color:var(--gray-500);font-size:14px;">If the website blocks our crawler, save the menu page from your browser and upload it here</p>
+                <p style="margin:0 0 8px;color:var(--gray-500);font-size:14px;">If the website blocks our crawler, save the menu page from your browser and upload it here</p>
+                <p style="margin:0 0 12px;color:#b45309;font-size:13px;font-weight:500;">Please disable ad blockers (uBlock Origin, AdBlock, etc.) before saving the page, or menu data may be missing.</p>
                 <input type="file" id="savedPageInput" accept=".html,.htm,.mhtml,.txt,.zip" style="display:none;" onchange="handleSavedPageUpload(event)">
                 <button class="btn btn-secondary" onclick="document.getElementById('savedPageInput').click()" style="min-width:180px;">
                   <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" style="margin-right:6px;">