Show peers immediately on discovery, before DataChannel opens

Emit peer_connected + peer_status(connecting) as soon as a PeerConn is
created, so peers appear in the sidebar even if ICE is still negotiating
or ultimately fails. The alias updates in-place once the DataChannel hello
arrives with the real nick.

Fixes: mobile/CGNAT peers being completely invisible when STUN hole
punching fails — they now show with a connecting/failed dot instead of
not appearing at all.

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

web/src/store/index.ts

@@ -235,7 +235,7 @@ export const useWaste = create<WasteState>((set, get) => ({
         if (msg.peer) {
           set(s => ({
             connectedPeers: s.connectedPeers.some(p => p.id === msg.peer!.id)
-              ? s.connectedPeers
+              ? s.connectedPeers.map(p => p.id === msg.peer!.id ? { ...p, ...msg.peer } : p)
               : [...s.connectedPeers, msg.peer!],
           }))
         }