feat: add browser AI connection guide and calculator instructions

offline/OfflineApp.svelte

@@ -1,6 +1,8 @@
 <script lang="ts">
   import { onMount } from 'svelte';
   import AnalyticsConsent from '../src/lib/components/AnalyticsConsent.svelte';
+  import AssistantConnection from '../src/lib/components/AssistantConnection.svelte';
+  import AiPage from '../src/routes/tools/ai/+page.svelte';
   import HomePage from '../src/routes/+page.svelte';
   import CardsPage from '../src/routes/cards/+page.svelte';
   import AnalysisPage from '../src/routes/analysis/+page.svelte';
@@ -26,6 +28,7 @@
     ['/rating', RatingPage],
     ['/combination', CombinationPage],
     ['/tools', ToolsPage],
+    ['/tools/ai', AiPage],
     ['/compare', ComparePage],
     ['/tools/random', ToolsPage],
     ['/tools/holo-work', HoloWorkPage],
@@ -63,13 +66,14 @@
     const eventTimer = window.setInterval(() => eventNow = Date.now(), 1_000);
     const rewriteInternalLinks = () => {
       for (const anchor of document.querySelectorAll<HTMLAnchorElement>('a[href^="/"]')) {
+        if (anchor.hasAttribute('download') || anchor.target === '_blank') continue;
         anchor.href = `#${anchor.getAttribute('href')}`;
       }
     };
     const handleClick = (event: MouseEvent) => {
       const target = event.target instanceof Element ? event.target.closest<HTMLAnchorElement>('a[href]') : null;
       const href = target?.getAttribute('href');
-      if (!href?.startsWith('/') || target?.target === '_blank') return;
+      if (!href?.startsWith('/') || target?.target === '_blank' || target?.hasAttribute('download')) return;
       event.preventDefault();
       window.location.hash = `#${href}`;
     };
@@ -119,6 +123,7 @@
   </div>
 </header>
 
+<AssistantConnection />
 <svelte:component this={CurrentPage} />
 
 <AnalyticsConsent pagePath={currentPath} />