GiteaPR: native iOS app to manage Gitea pull requests

Multi-repo PR inbox, review (approve/request changes/comment), merge with
gating toggle, read-only diff viewer, and Gitea Actions check status with
one-tap re-run. Ships unsigned via the iMac runner to the SideStore source.

GiteaPR/Settings/SettingsStore.swift

@@ -0,0 +1,54 @@
+import Foundation
+import SwiftUI
+
+enum MergeGateMode: String, CaseIterable, Identifiable {
+    case warn   = "Warn on red (allow merge with confirm)"
+    case block  = "Block merge when CI is red"
+
+    var id: String { rawValue }
+}
+
+/// Central settings: instance + token (Keychain) and app preferences.
+@MainActor
+final class SettingsStore: ObservableObject {
+    static let shared = SettingsStore()
+
+    @Published var instanceURL: String {
+        didSet { KeychainHelper.set(instanceURL, key: "instanceURL") }
+    }
+    @Published var token: String {
+        didSet { KeychainHelper.set(token, key: "token") }
+    }
+    @Published var mergeGateMode: MergeGateMode {
+        didSet { UserDefaults.standard.set(mergeGateMode.rawValue,
+                                           forKey: "mergeGateMode") }
+    }
+
+    private init() {
+        instanceURL = KeychainHelper.get("instanceURL") ?? "https://gitea.bueso.eu"
+        token = KeychainHelper.get("token") ?? ""
+        let raw = UserDefaults.standard.string(forKey: "mergeGateMode")
+        mergeGateMode = MergeGateMode(rawValue: raw ?? "") ?? .warn
+    }
+
+    var isConfigured: Bool {
+        !token.isEmpty && !instanceURL.isEmpty
+    }
+
+    var baseURL: URL? {
+        URL(string: instanceURL.hasSuffix("/") ?
+            String(instanceURL.dropLast()) : instanceURL)
+    }
+
+    func client() -> GiteaClient? {
+        guard let base = baseURL else { return nil }
+        return GiteaClient(instanceURL: base, token: token)
+    }
+
+    func logout() {
+        KeychainHelper.delete("instanceURL")
+        KeychainHelper.delete("token")
+        instanceURL = "https://gitea.bueso.eu"
+        token = ""
+    }
+}