Sessions Integration Feature

Nucleic-Session: FC94353F-9F0D-4BCC-AD7C-0FB14E38C2E5
Co-authored-by: Nucleic <[email protected]>

NucleicRemote/NucleicRemote/Models/RemoteStore.swift

@@ -184,13 +184,57 @@ final class RemoteStore: ObservableObject {
     /// Proactive network-path awareness (shared across every host connection): flips transports the
     /// instant Wi-Fi drops or returns, instead of waiting for a dead LAN socket to time out.
     let pathMonitor = NetworkPathMonitor()
-    /// One live connection per paired Mac (mesh P3 multiplexer). All connected at once; the flat
-    /// `sessions`/`connectivity`/`capabilities`/… above mirror the *active* one (`activeHostID`), so
-    /// switching hosts is instant (no reconnect). Empty in demo mode (demo seeds state directly).
+    /// One live connection per paired Mac (mesh P3 multiplexer). All connected at once, and the flat
+    /// `sessions`/`dashboard` above are the *merged* projection across every one of them — the phone
+    /// shows all your Macs together, with no active-host selector. Intents route to the Mac that owns
+    /// the target session/project (see `send`). Empty in demo mode (demo seeds state directly).
     private var connections: [String: HostConnection] = [:]
-    /// The active connection — the Mac whose projection the flat state reflects + whose transcript
-    /// is open.
-    private var activeConnection: HostConnection? { activeHostID.flatMap { connections[$0] } }
+
+    /// The connection whose projection drives the host-specific flat values (capabilities, scope,
+    /// catalog, connectivity, host name): the open session's Mac while a transcript is open, else a
+    /// representative live host (one with a populated catalog, falling back to any live/any host).
+    private var contextConnection: HostConnection? {
+        if let id = openSessionHostID, let conn = connections[id] { return conn }
+        return connections.values.first { $0.connectivity.isLive && !$0.modelCatalog.groups.isEmpty }
+            ?? connections.values.first { $0.connectivity.isLive }
+            ?? connections.values.first
+    }
+
+    /// A live connection to fall back on for host-agnostic intents (e.g. a project-less to-do
+    /// capture, which has no owning Mac).
+    private var firstLiveConnection: HostConnection? {
+        connections.values.first { $0.connectivity.isLive } ?? connections.values.first
+    }
+
+    // MARK: Intent routing (mesh P3) — resolve the Mac that owns a session / project / to-do.
+
+    private func connection(owningSession id: SessionID) -> HostConnection? {
+        connections.values.first { $0.sessions.contains { $0.sessionID == id } }
+    }
+    private func connection(owningProject id: ProjectID) -> HostConnection? {
+        connections.values.first { $0.dashboard.projects.contains { $0.id == id } }
+    }
+    private func connection(owningTodo id: TodoID) -> HostConnection? {
+        connections.values.first { $0.dashboard.todos.contains { $0.id == id } }
+    }
+    /// Send to every live connection — for host-agnostic pulls (list sessions/dashboard) and as the
+    /// safety fallback for an approval whose owning Mac isn't known (a notification-driven decision).
+    private func broadcastLive(_ msg: ClientMsg) {
+        for conn in connections.values where conn.connectivity.isLive { conn.send(msg) }
+    }
+
+    /// How many Macs are currently connected — the Sessions list shows a per-row host tag only when
+    /// more than one, so a single-Mac view stays clean.
+    var connectedHostCount: Int {
+        if demoMode { return 1 }
+        return connections.values.filter { $0.connectivity.isLive }.count
+    }
+
+    /// The name of the Mac that owns a session, for the per-row host tag. `nil` in demo (no
+    /// connections) or when the session isn't found on any connected Mac.
+    func hostName(forSession id: SessionID) -> String? {
+        connection(owningSession: id)?.hostName
+    }
     /// The phone's embedded Tailscale node state, for Settings (nil = not running). Shared across all
     /// connections (one embedded node, many dials).
     @Published private(set) var tailnetStatus: String?