chore: Archive-Polish — Versions-Sync + Orientations + Mac-Icon

- CFBundleShortVersionString 0.1.0 + CFBundleVersion 1 in beiden
  Extensions (Widget + Share), damit sie mit dem Main-Bundle matchen
  (Apple-Validation-Warning bei Embedded-Binary)
- UISupportedInterfaceOrientations (iPhone Portrait/Landscape +
  iPad alle vier), behebt Validation-Warning
- AppIcon mac-Slot auf size 1024x1024 (Asset-Catalog akzeptiert)
- xcodeVersion: 16.0 im XcodeGen-Manifest gegen "Update to
  recommended settings"-Hint
- ShareViewController: DispatchQueue.main.async für State-Updates
  aus NSItemProvider-Callbacks (Swift-6-Concurrency-Sauberkeit)
- PendingShareStore.append: guard url != nil statt unused-let

Archive verifiziert via xcodebuild archive -allowProvisioningUpdates:
ARCHIVE SUCCEEDED, alle drei Provisioning Profiles (cardecky,
cardecky.widget, cardecky.share) automatisch geholt + signiert.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

ShareExtension/ShareViewController.swift

@@ -31,16 +31,27 @@ final class ShareViewController: UIViewController {
                 group.enter()
                 provider.loadItem(forTypeIdentifier: UTType.url.identifier, options: nil) { item, _ in
                     if let url = item as? URL {
-                        self.sharedURL = url.absoluteString
-                        if self.sharedText.isEmpty { self.sharedText = url.absoluteString }
+                        let absolute = url.absoluteString
+                        DispatchQueue.main.async {
+                            self.sharedURL = absolute
+                            if self.sharedText.isEmpty { self.sharedText = absolute }
+                            group.leave()
+                        }
+                    } else {
+                        group.leave()
                     }
-                    group.leave()
                 }
             } else if provider.hasItemConformingToTypeIdentifier(UTType.plainText.identifier) {
                 group.enter()
                 provider.loadItem(forTypeIdentifier: UTType.plainText.identifier, options: nil) { item, _ in
-                    if let text = item as? String { self.sharedText = text }
-                    group.leave()
+                    if let text = item as? String {
+                        DispatchQueue.main.async {
+                            self.sharedText = text
+                            group.leave()
+                        }
+                    } else {
+                        group.leave()
+                    }
                 }
             }
         }