feat(ios): add discovery debug logs

apps/ios/Sources/Bridge/BridgeDiscoveryDebugLogView.swift

@@ -0,0 +1,69 @@
+import SwiftUI
+import UIKit
+
+struct BridgeDiscoveryDebugLogView: View {
+    @EnvironmentObject private var bridgeController: BridgeConnectionController
+    @AppStorage("bridge.discovery.debugLogs") private var debugLogsEnabled: Bool = false
+
+    var body: some View {
+        List {
+            if !self.debugLogsEnabled {
+                Text("Enable “Discovery Debug Logs” to start collecting events.")
+                    .foregroundStyle(.secondary)
+            }
+
+            if self.bridgeController.discoveryDebugLog.isEmpty {
+                Text("No log entries yet.")
+                    .foregroundStyle(.secondary)
+            } else {
+                ForEach(self.bridgeController.discoveryDebugLog) { entry in
+                    VStack(alignment: .leading, spacing: 2) {
+                        Text(Self.formatTime(entry.ts))
+                            .font(.caption)
+                            .foregroundStyle(.secondary)
+                        Text(entry.message)
+                            .font(.callout)
+                            .textSelection(.enabled)
+                    }
+                    .padding(.vertical, 4)
+                }
+            }
+        }
+        .navigationTitle("Discovery Logs")
+        .toolbar {
+            ToolbarItem(placement: .topBarTrailing) {
+                Button("Copy") {
+                    UIPasteboard.general.string = self.formattedLog()
+                }
+                .disabled(self.bridgeController.discoveryDebugLog.isEmpty)
+            }
+        }
+    }
+
+    private func formattedLog() -> String {
+        self.bridgeController.discoveryDebugLog
+            .map { "\(Self.formatISO($0.ts)) \($0.message)" }
+            .joined(separator: "\n")
+    }
+
+    private static let timeFormatter: DateFormatter = {
+        let formatter = DateFormatter()
+        formatter.dateFormat = "HH:mm:ss"
+        return formatter
+    }()
+
+    private static let isoFormatter: ISO8601DateFormatter = {
+        let formatter = ISO8601DateFormatter()
+        formatter.formatOptions = [.withInternetDateTime, .withFractionalSeconds]
+        return formatter
+    }()
+
+    private static func formatTime(_ date: Date) -> String {
+        self.timeFormatter.string(from: date)
+    }
+
+    private static func formatISO(_ date: Date) -> String {
+        self.isoFormatter.string(from: date)
+    }
+}
+