feat(ios): replace embedded website with initial native SwiftUI API client

Introduce real SwiftUI auth/dashboard/task/note/shopping screens, a bounded origin-bound URLSession transport and Keychain-backed native sessions. Archive the rejected WebKit renderer rather than embedding it for unfinished modules. Sixteen portable URL/contract/transport tests and Swift format/parsing pass on Linux; Apple SDK application and UI validation remains mandatory. This is an incomplete native slice, not full PWA parity or a release.

ios/Package.swift

@@ -9,10 +9,10 @@ let package = Package(
         .target(
             name: "Yuvomi", path: "Sources",
             exclude: [
-                "AuthenticationView.swift", "BrowserModel.swift", "ContentView.swift",
+                "NativeStore.swift", "NativeRootView.swift", "NativeSessionVault.swift",
                 "ServerProbe.swift", "YuvomiApp.swift", "PrivacyInfo.xcprivacy", "Assets.xcassets",
-            ], sources: ["ServerAddress.swift", "ServerMetadata.swift"]),
+            ], sources: ["ServerAddress.swift", "ServerMetadata.swift", "NativeContracts.swift", "NativeAPI.swift"]),
         .testTarget(
-            name: "YuvomiPolicyTests", dependencies: ["Yuvomi"], path: "Tests", exclude: ["BrowserModelTests.swift"]),
+            name: "YuvomiPolicyTests", dependencies: ["Yuvomi"], path: "Tests"),
     ]
 )