nvrsion: Add Chat: Mesh Group Reconnection, Fix Mac instances not re-joining mesh groups, and Refactor LANTransport, LANBrowser, PeerClient, and PeerDialer to ensure connections form when devices are online.

Nucleic-Promote: 1
Co-authored-by: Nucleic <[email protected]>

NucleicRemote/NucleicRemote/Views/Composer.swift

@@ -9,6 +9,9 @@ struct StartChatComposer: View {
     /// start typing a new chat immediately. Consumed (reset to false) once handled, so it never
     /// steals focus on a later Home appearance. `.constant(false)` for the iPhone/compact path.
     var focusNewChat: Binding<Bool> = .constant(false)
+    /// Called after a chat is kicked off, so a host that presents the composer modally (e.g. the
+    /// Sessions tab's floating New-chat button) can dismiss itself. Home leaves it nil and stays put.
+    var onStart: (() -> Void)? = nil
     @State private var projectID: ProjectID?
     @State private var draft = ""
     @State private var auto = false
@@ -93,6 +96,7 @@ struct StartChatComposer: View {
                             baseBranch: branch.isEmpty ? nil : branch,
                             useWorktree: useWorktree, auto: auto)
                         draft = ""
+                        onStart?()
                     }
                 } label: {
                     Image(systemName: "arrow.up.circle.fill").font(.title)

NucleicRemote/NucleicRemote/Views/SessionsView.swift

@@ -6,8 +6,13 @@ import NucleicProtocol
 struct SessionsView: View {
     @EnvironmentObject var store: RemoteStore
     @State private var showArchived = false
+    @State private var showNewChat = false
     @State private var path = NavigationPath()
 
+    /// The floating New-chat button only makes sense when this device can control a Mac and there's
+    /// at least one project to start a chat in; otherwise the composer it opens would be inert.
+    private var canStartChat: Bool { store.canControl && !store.dashboard.projects.isEmpty }
+
     private var grouped: [(title: String, rows: [WireSessionSummary])] {
         let pool = (showArchived ? store.sessions : store.liveSessions)
             .sorted(by: StatusStyle.attentionThenRecency)
@@ -84,10 +89,50 @@ struct SessionsView: View {
                     }
                 }
             }
+            // A floating "new chat" affordance in the lower-right, mirroring the Mac's per-project
+            // "New chat" button. Picks a project + prompt in a sheet, then kicks off the chat.
+            .overlay(alignment: .bottomTrailing) {
+                if canStartChat { newChatButton }
+            }
+            .sheet(isPresented: $showNewChat) {
+                NavigationStack {
+                    ScrollView {
+                        StartChatComposer(onStart: { showNewChat = false })
+                            .padding()
+                    }
+                    .navigationTitle("New chat")
+                    .navigationBarTitleDisplayMode(.inline)
+                    .toolbar {
+                        ToolbarItem(placement: .topBarLeading) {
+                            Button("Cancel") { showNewChat = false }
+                        }
+                    }
+                }
+                .presentationDetents([.medium, .large])
+            }
             .safeAreaInset(edge: .bottom) { ConnectionChip().padding(.bottom, 8) }
         }
     }
 
+    /// The circular plus button, styled to match the transcript's jump-to-bottom FAB: an accent
+    /// disc with a soft shadow, floated clear of the connection chip.
+    private var newChatButton: some View {
+        Button {
+            showNewChat = true
+        } label: {
+            Image(systemName: "plus")
+                .font(.system(size: 22, weight: .semibold))
+                .foregroundStyle(.white)
+                .frame(width: 56, height: 56)
+                .background(Palette.accent, in: .circle)
+                .shadow(color: .black.opacity(0.25), radius: 6, y: 2)
+        }
+        .buttonStyle(.plain)
+        .padding(.trailing, 20)
+        .padding(.bottom, 20)
+        .accessibilityLabel("New chat")
+    }
+
     /// Push the session a notification tap asked for, then clear the request.
     private func consumeRoute() {
         guard let route = store.pendingRoute else { return }