Implement v4.6.0: sweep Live Activity, share extension, iPad split view, actionable notifications

- Sweep Live Activity: SweepActivityAttributes (Shared/), lock-screen + Dynamic
  Island UI in the widget extension, driven by SweepActivityController wired into
  the batch pipeline (begin/update/end); NSSupportsLiveActivities in Info.plist.
- Share extension (DomainDigShareExtension): accepts a web URL from the share
  sheet, extracts the host, and hands it to the app via the App Group inbox
  (DomainDigShareInbox); the app consumes it on activation and inspects it.
- iPad layout: RootTabView uses NavigationSplitView in the regular size class
  and the tab bar in compact.
- Actionable notifications: per-domain threadIdentifier grouping, a Re-inspect
  action, and tap routing into the domain detail via the intent router.
- Bump version to 4.6.0 (build 38) across app, widget, and share targets.

3 files changed, 114 insertions, 0 deletions

diff --git a/DomainDigShareExtension/DomainDigShareExtension.entitlements b/DomainDigShareExtension/DomainDigShareExtension.entitlements
new file mode 100644
index 0000000..eaa20ba
--- /dev/null
+++ b/DomainDigShareExtension/DomainDigShareExtension.entitlements
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+    <key>com.apple.security.application-groups</key>
+    <array>
+        <string>group.net.cleberg.DomainDig</string>
+    </array>
+</dict>
+</plist>
diff --git a/DomainDigShareExtension/Info.plist b/DomainDigShareExtension/Info.plist
new file mode 100644
index 0000000..ac17ff0
--- /dev/null
+++ b/DomainDigShareExtension/Info.plist
@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+    <key>CFBundleDevelopmentRegion</key>
+    <string>$(DEVELOPMENT_LANGUAGE)</string>
+    <key>CFBundleDisplayName</key>
+    <string>Dig Domain</string>
+    <key>CFBundleExecutable</key>
+    <string>$(EXECUTABLE_NAME)</string>
+    <key>CFBundleIdentifier</key>
+    <string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+    <key>CFBundleInfoDictionaryVersion</key>
+    <string>6.0</string>
+    <key>CFBundleName</key>
+    <string>$(PRODUCT_NAME)</string>
+    <key>CFBundlePackageType</key>
+    <string>$(PRODUCT_BUNDLE_PACKAGE_TYPE)</string>
+    <key>CFBundleShortVersionString</key>
+    <string>$(MARKETING_VERSION)</string>
+    <key>CFBundleVersion</key>
+    <string>$(CURRENT_PROJECT_VERSION)</string>
+    <key>NSExtension</key>
+    <dict>
+        <key>NSExtensionAttributes</key>
+        <dict>
+            <key>NSExtensionActivationRule</key>
+            <dict>
+                <key>NSExtensionActivationSupportsWebURLWithMaxCount</key>
+                <integer>1</integer>
+            </dict>
+        </dict>
+        <key>NSExtensionPointIdentifier</key>
+        <string>com.apple.share-services</string>
+        <key>NSExtensionPrincipalClass</key>
+        <string>$(PRODUCT_MODULE_NAME).ShareViewController</string>
+    </dict>
+</dict>
+</plist>
diff --git a/DomainDigShareExtension/ShareViewController.swift b/DomainDigShareExtension/ShareViewController.swift
new file mode 100644
index 0000000..411f9e7
--- /dev/null
+++ b/DomainDigShareExtension/ShareViewController.swift
@@ -0,0 +1,65 @@
+import UIKit
+import UniformTypeIdentifiers
+
+/// Receives a web URL from the share sheet, extracts its host, and hands it to
+/// the app through the App Group inbox. Shows a brief confirmation and closes;
+/// the app picks up the domain the next time it becomes active.
+final class ShareViewController: UIViewController {
+    private let label = UILabel()
+
+    override func viewDidLoad() {
+        super.viewDidLoad()
+        view.backgroundColor = .systemBackground
+
+        label.text = "Saving…"
+        label.font = .preferredFont(forTextStyle: .headline)
+        label.textAlignment = .center
+        label.numberOfLines = 0
+        label.translatesAutoresizingMaskIntoConstraints = false
+        view.addSubview(label)
+        NSLayoutConstraint.activate([
+            label.centerXAnchor.constraint(equalTo: view.centerXAnchor),
+            label.centerYAnchor.constraint(equalTo: view.centerYAnchor),
+            label.leadingAnchor.constraint(greaterThanOrEqualTo: view.leadingAnchor, constant: 24),
+            label.trailingAnchor.constraint(lessThanOrEqualTo: view.trailingAnchor, constant: -24)
+        ])
+
+        extractSharedDomain { [weak self] domain in
+            DispatchQueue.main.async {
+                self?.finish(domain: domain)
+            }
+        }
+    }
+
+    private func extractSharedDomain(completion: @escaping (String?) -> Void) {
+        let providers = (extensionContext?.inputItems ?? [])
+            .compactMap { $0 as? NSExtensionItem }
+            .flatMap { $0.attachments ?? [] }
+
+        guard let provider = providers.first(where: {
+            $0.hasItemConformingToTypeIdentifier(UTType.url.identifier)
+        }) else {
+            completion(nil)
+            return
+        }
+
+        provider.loadItem(forTypeIdentifier: UTType.url.identifier) { item, _ in
+            let url = item as? URL ?? (item as? Data).flatMap { URL(dataRepresentation: $0, relativeTo: nil) }
+            let host = url?.host?.trimmingCharacters(in: .whitespacesAndNewlines)
+            completion(host?.isEmpty == false ? host : nil)
+        }
+    }
+
+    private func finish(domain: String?) {
+        if let domain {
+            DomainDigShareInbox.write(domain: domain)
+            label.text = "Saved \(domain) — open DomainDig to inspect it."
+        } else {
+            label.text = "No web address found."
+        }
+
+        DispatchQueue.main.asyncAfter(deadline: .now() + 1.4) { [weak self] in
+            self?.extensionContext?.completeRequest(returningItems: nil)
+        }
+    }
+}