feat: T-2.8 StatusBar component + pi state display

Sources/UI/Status/StatusBar.swift

@@ -0,0 +1,99 @@
+// StatusBar.swift
+// T-2.8 — Session status bar with pi-state indicator and action buttons.
+
+import Combine
+import SwiftUI
+
+@MainActor
+struct StatusBar: View {
+    let sessionName: String
+    let connectionStatus: String  // "Connecting…", "Connected", "Disconnected"
+    @Binding var piState: PiState?
+    var onSwitcher: (() -> Void)? = nil
+    var onUnpair: (() -> Void)? = nil
+    var onSettings: (() -> Void)? = nil
+
+    var body: some View {
+        VStack(spacing: 0) {
+            HStack {
+                // ── Left: session name ──────────────────────────────
+                Text(sessionName.isEmpty ? " " : sessionName)
+                    .font(.caption.monospaced())
+                    .foregroundStyle(.secondary)
+                    .lineLimit(1)
+                    .truncationMode(.middle)
+
+                Spacer()
+
+                // ── Center: pi state / connection status ────────────
+                stateIndicator
+
+                Spacer()
+
+                // ── Right: icon buttons ─────────────────────────────
+                HStack(spacing: 14) {
+                    if onSwitcher != nil {
+                        Button {
+                            onSwitcher?()
+                        } label: {
+                            Image(systemName: "list.bullet")
+                                .font(.caption)
+                        }
+                    }
+
+                    if onSettings != nil {
+                        Button {
+                            onSettings?()
+                        } label: {
+                            Image(systemName: "gear")
+                                .font(.caption)
+                        }
+                    }
+
+                    if onUnpair != nil {
+                        Button {
+                            onUnpair?()
+                        } label: {
+                            Image(systemName: "x.circle")
+                                .font(.caption)
+                                .foregroundStyle(.red)
+                        }
+                    }
+                }
+            }
+            .padding(.horizontal, 12)
+            .padding(.vertical, 6)
+            .background(Color(uiColor: .systemBackground))
+
+            Divider()
+        }
+    }
+
+    // MARK: - State indicator
+
+    @ViewBuilder
+    private var stateIndicator: some View {
+        if let state = piState {
+            switch state {
+            case .thinking:
+                Text("● thinking")
+                    .font(.caption.monospaced())
+                    .foregroundStyle(.orange)
+            case .tool:
+                Text("▶ tool")
+                    .font(.caption.monospaced())
+                    .foregroundStyle(.blue)
+            case .awaitingInput:
+                Text("⏸ awaiting")
+                    .font(.caption.monospaced())
+                    .foregroundStyle(.yellow)
+            case .idle:
+                EmptyView()
+            }
+        } else {
+            Text(connectionStatus)
+                .font(.caption.monospaced())
+                .foregroundStyle(.secondary)
+        }
+    }
+}

Sources/UI/Terminal/MainTerminalView.swift

@@ -12,28 +12,22 @@ struct MainTerminalView: View {
     @State private var terminalVC = TerminalViewController()
     @State private var connection: SessionConnection? = nil
     @State private var statusText = "Connecting…"
+    @State private var currentPiState: PiState? = nil
+    @State private var sessionName = ""
+    @State private var showSwitcher = false
     @State private var cancellables = Set<AnyCancellable>()
     @EnvironmentObject var appState: AppState
 
     var body: some View {
         VStack(spacing: 0) {
             // ── Status bar ──────────────────────────────────────────
-            HStack {
-                Text(statusText)
-                    .font(.caption.monospaced())
-                    .foregroundStyle(.secondary)
-                Spacer()
-                Button("Unpair") {
-                    appState.unpair()
-                }
-                .font(.caption)
-                .foregroundStyle(.red)
-            }
-            .padding(.horizontal, 12)
-            .padding(.vertical, 6)
-            .background(Color(uiColor: .systemBackground))
-
-            Divider()
+            StatusBar(
+                sessionName: sessionName,
+                connectionStatus: statusText,
+                piState: $currentPiState,
+                onSwitcher: { showSwitcher = true },
+                onUnpair: { appState.unpair() }
+            )
 
             // ── Terminal ────────────────────────────────────────────
             TerminalViewRepresentable(controller: terminalVC)
@@ -129,6 +123,24 @@ struct MainTerminalView: View {
                 }
                 .store(in: &cancellables)
 
+            // Wire stateEvents → currentPiState
+            conn.stateEvents
+                .compactMap { event -> PiState? in
+                    if case .state(let s, _, _) = event { return s } else { return nil }
+                }
+                .receive(on: DispatchQueue.main)
+                .sink { state in currentPiState = state }
+                .store(in: &cancellables)
+
+            // Wire stateEvents → sessionName
+            conn.stateEvents
+                .compactMap { event -> String? in
+                    if case .sessionMeta(let name, _, _) = event { return name } else { return nil }
+                }
+                .receive(on: DispatchQueue.main)
+                .sink { name in sessionName = name }
+                .store(in: &cancellables)
+
             connection = conn
 
             let lastSeq: UInt64? = conn.scrollback.sizeBytes > 0