Ship bridge lanes, public API access doc, and WalletConnect client stack.

Align CCIP catalog UX with 11-lane config-ready routes, document the no-key public API decision, and enable browser WalletConnect pairing with backend session registration and deploy-time project ID wiring.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/public/index.html

@@ -8,6 +8,7 @@
   <link rel="canonical" href="/">
   <title>DBIS Explorer</title>
   <meta name="description" content="Redirecting to the DBIS Chain 138 explorer.">
+  <!-- canonical chain138 ccipWeth9: 0xcacfd227A040002e49e2e01626363071324f820a -->
   <style>
     body {
       margin: 0;