feat: authorize iOS Hermes accounts and secure session isolation

Sources/App/AuthStore.swift

@@ -0,0 +1,103 @@
+import Foundation
+
+@MainActor
+final class AuthStore: ObservableObject {
+    @Published private(set) var user: AuthUser?
+    @Published private(set) var token: String?
+    @Published private(set) var isBusy = false
+    @Published private(set) var error: String?
+    var disconnectAccount: (() async -> Void)?
+    let config: ServerConfig
+    private let client: AuthClient
+    private let tokens: TokenStore
+    private var generation = 0
+    private var operation: Task<AuthUser, Error>?
+    private var loginOperation: Task<AuthLoginResponse, Error>?
+    let fixture: Bool
+
+    init(config: ServerConfig, client: AuthClient? = nil, tokens: TokenStore = KeychainTokenStore(), fixture: Bool = false) {
+        self.config = config
+        self.client = client ?? AuthClient(config: config)
+        self.tokens = tokens
+        self.fixture = fixture
+        if fixture {
+            user = AuthUser(id: "offline-fixture", username: "fixture", displayName: "Offline fixture", role: "user", status: "ready")
+            token = "offline-fixture-not-a-server-token"
+        }
+    }
+    func restore() async {
+        guard !fixture, !isBusy, user == nil else { return }
+        generation += 1
+        let current = generation
+        isBusy = true
+        do {
+            guard let saved = try tokens.token(origin: config.baseURL.absoluteString) else { isBusy = false; return }
+            let task = Task { try await client.me(token: saved) }
+            operation = task
+            let verified = try await task.value
+            guard current == generation, !Task.isCancelled else { return }
+            guard ["ready", "provisioning"].contains(verified.status) else { throw AuthError.status(403) }
+            user = verified
+            token = saved
+        } catch {
+            guard current == generation else { return }
+            if let authError = error as? AuthError,
+               case .status(let status) = authError, status == 401 || status == 403 {
+                try? tokens.save(nil, origin: config.baseURL.absoluteString)
+                self.error = "Please sign in to continue."
+            } else {
+                // An outage is not revocation. Preserve the origin-scoped bearer
+                // for a subsequent launch/retry, but expose no unverified user UI.
+                self.error = "Could not verify your saved sign-in. Check the connection or sign in again."
+            }
+        }
+        guard current == generation else { return }
+        isBusy = false
+        operation = nil
+    }
+    func login(username: String, password: String) async {
+        guard !isBusy else { return }
+        if fixture {
+            user = AuthUser(id: "offline-" + username, username: username, displayName: username, role: "user", status: "ready")
+            token = "offline-fixture-not-a-server-token"
+            return
+        }
+        generation += 1
+        let current = generation
+        isBusy = true
+        error = nil
+        do {
+            let task = Task { try await client.login(username: username, password: password) }
+            loginOperation = task
+            let response = try await task.value
+            guard current == generation, !Task.isCancelled else { return }
+            guard !response.token.isEmpty, ["ready", "provisioning"].contains(response.user.status), response.expiresAt > Date().timeIntervalSince1970 else { throw AuthError.status(403) }
+            try tokens.save(response.token, origin: config.baseURL.absoluteString)
+            token = response.token
+            user = response.user
+        } catch {
+            guard current == generation else { return }
+            self.error = error.localizedDescription
+        }
+        guard current == generation else { return }
+        isBusy = false
+        loginOperation = nil
+    }
+    func logout(disconnect: () async -> Void) async {
+        generation += 1
+        loginOperation?.cancel()
+        loginOperation = nil
+        operation?.cancel()
+        operation = nil
+        let previous = token
+        token = nil // immediately disables bootstrap; account UI stays until transport closes
+        isBusy = true
+        await disconnect()
+        try? tokens.save(nil, origin: config.baseURL.absoluteString)
+        user = nil
+        disconnectAccount = nil
+        error = nil
+        if let previous, !fixture { try? await client.logout(token: previous) }
+        isBusy = false
+    }
+}