Feature/peer colors (#476)

* Feature: assign stable per-peer colors (non-self) across mesh/geohash/DM; keep self orange and mentions-to-me orange; cache colors

* Fix compile warnings: remove unused primaryColor in formatMessageAsText; remove unused CryptoKit import; mark peerColor/formatMessageAsText @MainActor to call main-actor helpers

* Fix: re-import CryptoKit for SHA256 usage in ChatViewModel

* Peer lists: apply same per-peer colors as chat (self orange); suffix uses lighter variant; geohash uses Nostr pubkey, mesh uses Noise key

* Fix warning: remove unused peerNicknames in MeshPeerList

* UI: add 'mention' action in message actions to prefill input with @nick#abcd and focus input

* UX: long-press a message to prefill @mention with sender's full nick#abcd and focus input

* UX: remove long-press mention; add context menu 'Copy message' that copies only the message body (no nick/timestamp)

* Geo teleported: robust tag detection (accept 't', 'teleport', and boolean-like values); mark self on send when tagging; should fix peer list icons

* Logs: add GeoTeleport diagnostics (incoming tags, self/peer marking, counts) to debug peer list dashed icon behavior

* Teleport persistence: store per-geohash teleported state in UserDefaults; initialize on startup; OR with location-derived status; sheet writes persisted flag on select/teleport

---------

Co-authored-by: jack <jackjackbits@users.noreply.github.com>

bitchat/Views/MeshPeerList.swift

@@ -7,6 +7,7 @@ struct MeshPeerList: View {
     let onTapPeer: (String) -> Void
     let onToggleFavorite: (String) -> Void
     let onShowFingerprint: (String) -> Void
+    @Environment(\.colorScheme) var colorScheme
 
     var body: some View {
         Group {
@@ -17,7 +18,6 @@ struct MeshPeerList: View {
                     .padding(.horizontal)
                     .padding(.top, 12)
             } else {
-                let peerNicknames = viewModel.meshService.getPeerNicknames()
                 let myPeerID = viewModel.meshService.myPeerID
                 let mapped: [(peer: BitchatPeer, isMe: Bool, hasUnread: Bool, enc: EncryptionStatus)] = viewModel.allPeers.map { peer in
                     let isMe = peer.id == myPeerID
@@ -61,7 +61,8 @@ struct MeshPeerList: View {
 
                         let displayName = isMe ? viewModel.nickname : peer.nickname
                         let (base, suffix) = splitSuffix(from: displayName)
-                        let baseColor = ((peer.favoriteStatus?.isFavorite ?? false) || peerNicknames[peer.id] != nil) ? textColor : secondaryTextColor
+                        let assigned = viewModel.colorForMeshPeer(id: peer.id, isDark: colorScheme == .dark)
+                        let baseColor = isMe ? Color.orange : assigned
                         HStack(spacing: 0) {
                             Text(base)
                                 .font(.system(size: 14, design: .monospaced))