ζ-3.5b: Pending-Queue-UI + NWPathMonitor-Reconnect-Flush

Pending-Queue-UI:
- AccountView.pendingQueueCard listet alle wartenden Submissions
  mit Text-Preview (120c), Author, createdAt, retryCount, lastError
- "Jetzt versuchen"-Button triggert tryFlush(api:)
- Trash-Icon pro Row löscht einzeln aus der Queue
- Pull-to-Refresh aktualisiert beide Listen
- Card-View nur sichtbar wenn Queue-Tiefe > 0

ReachabilityWatcher:
- NWPathMonitor erkennt Reconnect-Flanke (offline → online)
- Bei Reconnect: SubmissionQueue.tryFlush auf @MainActor
- Filtert reine Wifi↔Mobil-Switches raus (nur "wieder erreichbar"
  zählt)
- Lebt im App-Root, startet nach Launch via .task

Files:
- Sources/Core/Submit/ReachabilityWatcher.swift (neu)
- Sources/App/ZitareNativeApp.swift: reachability.start in .task
- Sources/Features/Account/AccountView.swift: pendingQueueCard

iOS + macOS BUILD SUCCEEDED.

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

Sources/App/ZitareNativeApp.swift

@@ -10,6 +10,7 @@ struct ZitareNativeApp: App {
     @State private var authGate: ManaAuthGate
     @State private var submissionQueue: SubmissionQueue
     private let snapshotContainer: ModelContainer?
+    private let reachability = ReachabilityWatcher()
 
     init() {
         let auth = AuthClient(config: AppConfig.manaAppConfig)
@@ -51,6 +52,7 @@ struct ZitareNativeApp: App {
                 .task {
                     await refreshSnapshot()
                     await flushPending()
+                    startReachability()
                 }
         }
     }
@@ -63,6 +65,24 @@ struct ZitareNativeApp: App {
         }
     }
 
+    /// Startet den NWPathMonitor und hooked Reconnect → Flush.
+    /// `Task.detached` + `await MainActor`, weil das Reconnect-Closure
+    /// vom Network-Framework auf einer privaten Queue feuert.
+    private func startReachability() {
+        let queue = submissionQueue
+        let auth = auth
+        reachability.start { [weak queue] in
+            guard let queue else { return }
+            Task { @MainActor in
+                let api = ZitareAPI(auth: auth)
+                let sent = await queue.tryFlush(api: api)
+                if sent > 0 {
+                    Log.app.info("Reachability-Flush: \(sent) Submission(s) nachgereicht")
+                }
+            }
+        }
+    }
+
     private func refreshSnapshot() async {
         guard let container = snapshotContainer else { return }
         let sync = SnapshotSync(container: container)