Initial release: Scarf — macOS GUI for the Hermes AI agent

Native SwiftUI app providing full visibility into the Hermes AI agent:
- Dashboard with system health, token usage, and cost tracking
- Sessions browser with conversation detail and FTS5 search
- Activity feed with tool call inspector (read/edit/execute/fetch/browser)
- Embedded terminal chat via SwiftTerm with full ANSI/Rich rendering
- Memory viewer/editor with live file-watching refresh
- Skills browser by category with file content viewer
- Cron job viewer with output display
- Real-time log tailing with level filtering
- Settings display with raw config and Finder path links
- Menu bar status icon with quick actions

Architecture: MVVM-Feature, zero dependencies beyond SwiftTerm,
read-only SQLite access, Swift 6 strict concurrency.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

scarf/scarf/Navigation/AppCoordinator.swift

@@ -0,0 +1,35 @@
+import Foundation
+
+enum SidebarSection: String, CaseIterable, Identifiable {
+    case dashboard = "Dashboard"
+    case sessions = "Sessions"
+    case activity = "Activity"
+    case chat = "Chat"
+    case memory = "Memory"
+    case skills = "Skills"
+    case cron = "Cron"
+    case logs = "Logs"
+    case settings = "Settings"
+
+    var id: String { rawValue }
+
+    var icon: String {
+        switch self {
+        case .dashboard: return "gauge.with.dots.needle.33percent"
+        case .sessions: return "bubble.left.and.bubble.right"
+        case .activity: return "bolt.horizontal"
+        case .chat: return "text.bubble"
+        case .memory: return "brain"
+        case .skills: return "lightbulb"
+        case .cron: return "clock.arrow.2.circlepath"
+        case .logs: return "doc.text"
+        case .settings: return "gearshape"
+        }
+    }
+}
+
+@Observable
+final class AppCoordinator {
+    var selectedSection: SidebarSection = .dashboard
+    var selectedSessionId: String?
+}