feat(ios): share extension ile Ratebubble iOS istemcisini ekle ve paylaşım akışını düzelt

ios/Ratebubble/App/MainViewModel.swift

@@ -0,0 +1,36 @@
+import Foundation
+
+@MainActor
+final class MainViewModel: ObservableObject {
+    @Published var sharedURL: String = ""
+    @Published var isLoading: Bool = false
+    @Published var result: GetInfoResponse?
+    @Published var errorMessage: String?
+
+    func consumeSharedURLIfAny() {
+        guard let incoming = SharedPayloadStore.consumeIncomingURL(), !incoming.isEmpty else {
+            return
+        }
+        sharedURL = incoming
+        Task { await fetch() }
+    }
+
+    func fetch() async {
+        guard !sharedURL.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty else {
+            errorMessage = "Paylaşılan URL boş olamaz."
+            return
+        }
+
+        isLoading = true
+        errorMessage = nil
+        result = nil
+
+        do {
+            result = try await APIClient.shared.getInfo(url: sharedURL)
+        } catch {
+            errorMessage = error.localizedDescription
+        }
+
+        isLoading = false
+    }
+}