feat(v3.0.0): unify platform architecture and introduce feature tiers

* consolidate DomainReport as canonical data model
* add feature tier system (free/pro/data+ scaffolding)
* apply clean feature gating across workflows and tracking
* refactor app structure for maintainability
* standardize navigation and settings
* add data lifecycle controls
* ensure consistency across UI, export, and CLI
* stabilize internal inspection API

1 files changed, 42 insertions, 0 deletions

diff --git a/DomainDig/RootTabView.swift b/DomainDig/RootTabView.swift
new file mode 100644
index 0000000..19ea444
--- /dev/null
+++ b/DomainDig/RootTabView.swift
@@ -0,0 +1,42 @@
+import SwiftUI
+
+struct RootTabView: View {
+    @Bindable var viewModel: DomainViewModel
+
+    var body: some View {
+        TabView {
+            ContentView(viewModel: viewModel)
+                .tabItem {
+                    Label("Inspect", systemImage: "magnifyingglass")
+                }
+
+            NavigationStack {
+                WatchlistView(viewModel: viewModel)
+            }
+            .tabItem {
+                Label("Watchlist", systemImage: "eye")
+            }
+
+            NavigationStack {
+                HistoryView(viewModel: viewModel)
+            }
+            .tabItem {
+                Label("History", systemImage: "clock.arrow.trianglehead.counterclockwise.rotate.90")
+            }
+
+            NavigationStack {
+                WorkflowsView(viewModel: viewModel)
+            }
+            .tabItem {
+                Label("Workflows", systemImage: "square.stack.3d.down.right")
+            }
+
+            NavigationStack {
+                SettingsView(viewModel: viewModel)
+            }
+            .tabItem {
+                Label("Settings", systemImage: "gearshape")
+            }
+        }
+    }
+}