Fix web client: gracefully handle CLI members in groups

- fetchPeerKey: catch JSON parse error for CLI bincode bundles,
  show clear "CLI client — needs WASM bridge" message
- Group send: silently skip CLI members instead of showing
  error per member (mixed groups work, web members get messages,
  CLI members are skipped without noise)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

warzone/crates/warzone-server/src/routes/web.rs

@@ -250,9 +250,15 @@ async function fetchPeerKey(peerFP) {
   const data = await resp.json();
   const bundleBytes = Uint8Array.from(atob(data.bundle), c => c.charCodeAt(0));
   const bundleStr = new TextDecoder().decode(bundleBytes);
-  const bundle = JSON.parse(bundleStr);
 
-  if (bundle.type !== 'web') throw new Error('Peer is CLI client (incompatible crypto). Use CLI to chat with them.');
+  let bundle;
+  try {
+    bundle = JSON.parse(bundleStr);
+  } catch(e) {
+    throw new Error('CLI client — cannot encrypt (different crypto, needs WASM bridge)');
+  }
+
+  if (bundle.type !== 'web') throw new Error('CLI client — cannot encrypt (different crypto)');
 
   const aesKey = await deriveAESKey(bundle.jwk);
   derivedKeys[fp] = aesKey;
@@ -459,11 +465,11 @@ async function sendToGroup(groupName, text) {
         message: Array.from(new TextEncoder().encode(envelope))
       });
     } catch(e) {
-      addSys('Failed to encrypt for ' + memberFP.slice(0,8) + ': ' + e.message);
+      // Silently skip CLI members (different crypto)
     }
   }
 
-  if (messages.length === 0) return;
+  if (messages.length === 0) { addSys('No compatible web members to send to'); return; }
 
   await fetch(SERVER + '/v1/groups/' + groupName + '/send', {
     method: 'POST',