Mobile wallet deep links on the join page: no injected wallet -> offer Open-in-MetaMask/Trust buttons that reopen this URL (ref included) inside the wallet's dApp browser

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

public/join-now.js

@@ -81,7 +81,7 @@
   async function connect(){
     try{
       eth=await window.RMCWallet.pick();
-      if(!eth){ log('No wallet selected or detected. Install/unlock MetaMask, Trust, or SafePal and try again.','err'); return; }
+      if(!eth){ showWalletHelp(); log('No wallet detected in this browser. On a phone, use the "Open in your wallet" buttons above — on a computer, install/unlock MetaMask and refresh.','err'); return; }
       attachWalletEvents();
       log('Requesting wallet connection…');
       var accs=await req('eth_requestAccounts'); account=accs[0];
@@ -143,6 +143,17 @@
     }catch(e){}
   }
 
+  // Mobile browsers have no injected wallet — offer deep links that reopen
+  // THIS page (query string included, so ?ref= survives) inside the wallet
+  // app's own browser, where window.ethereum exists.
+  function showWalletHelp(){
+    var box=$('walletHelp'); if(!box) return;
+    var here=location.host+location.pathname+location.search;
+    var mm=$('mmDeep'); if(mm) mm.href='https://metamask.app.link/dapp/'+here;
+    var tw=$('twDeep'); if(tw) tw.href='https://link.trustwallet.com/open_url?url='+encodeURIComponent(location.href);
+    box.style.display='block';
+  }
+
   function attachWalletEvents(){
     if(!eth||!eth.on||eth.__rmcBound) return; eth.__rmcBound=true;
     eth.on('accountsChanged',function(accs){ account=(accs&&accs[0])||null; if(!account){ $('connected').style.display='none'; $('connectBtn').style.display=''; } else { $('wallet').textContent=account.slice(0,6)+'…'+account.slice(-4); refreshBalance(); } });