feat(KAN-70): integrate native workspace and update settings

native/src-tauri/gen/apple/Sources/kanbangit-native/WorkspaceViewController.swift

@@ -40,6 +40,8 @@ final class WorkspaceViewController: UIViewController, WKNavigationDelegate, WKU
     private let connectButton = UIButton(type: .system)
     private let resumeButton = UIButton(type: .system)
     private let toolbar = UIToolbar()
+    private var settingsAvailable = false
+    private var toolbarHeight: NSLayoutConstraint!
     private var appearance: UISegmentedControl!
 
     init(defaults: UserDefaults = .standard) {
@@ -165,7 +167,9 @@ final class WorkspaceViewController: UIViewController, WKNavigationDelegate, WKU
         let settings = UIBarButtonItem(title: text("serverSettings"), style: .plain, target: self, action: #selector(showSettings))
         settings.accessibilityIdentifier = "showServerSettings"
         toolbar.items = [UIBarButtonItem(systemItem: .flexibleSpace), settings]
+        toolbarHeight = toolbar.heightAnchor.constraint(equalToConstant: 44)
         NSLayoutConstraint.activate([
+            toolbarHeight,
             toolbar.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor),
             toolbar.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor),
             toolbar.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor),
@@ -201,6 +205,7 @@ final class WorkspaceViewController: UIViewController, WKNavigationDelegate, WKU
         timeout?.cancel()
         workspace?.stopLoading()
         workspace?.navigationDelegate = nil
+        workspace?.configuration.userContentController.removeScriptMessageHandler(forName: "kanbanSettings", contentWorld: .page)
         workspace?.removeFromSuperview()
         connection = WorkspaceConnection()
         server = selected
@@ -209,7 +214,11 @@ final class WorkspaceViewController: UIViewController, WKNavigationDelegate, WKU
         let scriptURL = Bundle(for: WorkspaceViewController.self).url(forResource: "workspace-navigation", withExtension: "js")!
         let script = try! String(contentsOf: scriptURL, encoding: .utf8)
         configuration.userContentController.addUserScript(WKUserScript(source: script, injectionTime: .atDocumentStart, forMainFrameOnly: true))
-        // Remote content receives no native message handlers or Tauri bridge.
+        let settingsURL = Bundle(for: WorkspaceViewController.self).url(forResource: "workspace-settings", withExtension: "js")!
+        let settingsScript = try! String(contentsOf: settingsURL, encoding: .utf8)
+        configuration.userContentController.addUserScript(WKUserScript(source: settingsScript, injectionTime: .atDocumentStart, forMainFrameOnly: true))
+        configuration.userContentController.addScriptMessageHandler(NativeSettingsHandler(controller: self), contentWorld: .page, name: "kanbanSettings")
+        setSettingsAvailable(false)
         let webview = WKWebView(frame: .zero, configuration: configuration)
         webview.navigationDelegate = self
         webview.uiDelegate = self
@@ -269,10 +278,48 @@ final class WorkspaceViewController: UIViewController, WKNavigationDelegate, WKU
         loading.stopAnimating()
         view.endEditing(true)
         launcher.isHidden = true
-        toolbar.isHidden = false
+        toolbar.isHidden = settingsAvailable
         workspace?.isHidden = false
     }
 
+    private func setSettingsAvailable(_ available: Bool) {
+        settingsAvailable = available
+        toolbarHeight.constant = available ? 0 : 44
+        toolbar.isHidden = available || !launcher.isHidden || !connection.ready
+    }
+
+    func handleSettings(_ message: WKScriptMessage, reply: @escaping (Any?, String?) -> Void) {
+        guard message.webView === workspace, message.frameInfo.isMainFrame,
+              let source = message.frameInfo.request.url, server?.allows(source) == true,
+              let current = workspace?.url, server?.allows(current) == true,
+              let body = message.body as? String else { reply(nil, "untrustedFrame"); return }
+        do {
+            let request = try NativeSettingsRequest.parse(body)
+            var result: Any = NSNull()
+            switch request.action {
+            case "getState":
+                result = ["apiVersion": 1, "platform": "ios", "workspace": server!.url.absoluteString,
+                          "version": Bundle.main.object(forInfoDictionaryKey: "CFBundleShortVersionString") as? String ?? "unknown",
+                          "capabilities": ["workspace"]] as [String: Any]
+            case "settingsReady": setSettingsAvailable(true)
+            case "openSettings": showSettings()
+            case "setWorkspace":
+                guard let address = request.payload["server"] as? String,
+                      let url = WorkspaceServer.normalize(address) else { throw NativeSettingsError.invalidServer }
+                let owner = workspace
+                DispatchQueue.main.async { [weak self] in
+                    guard let self, self.workspace === owner else { return }
+                    self.open(url)
+                }
+            default: throw NativeSettingsError.invalidRequest
+            }
+            let data = try JSONSerialization.data(withJSONObject: ["id": request.id, "result": result])
+            reply(String(decoding: data, as: UTF8.self), nil)
+        } catch {
+            reply(nil, String(describing: error))
+        }
+    }
+
     func webView(_ webView: WKWebView, decidePolicyFor action: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {
         guard webView === workspace, let url = action.request.url else { decisionHandler(.cancel); return }
         guard server?.allows(url) == true else {
@@ -299,6 +346,7 @@ final class WorkspaceViewController: UIViewController, WKNavigationDelegate, WKU
 
     func webView(_ webView: WKWebView, didStartProvisionalNavigation navigation: WKNavigation!) {
         guard webView === workspace else { return }
+        setSettingsAvailable(false)
         pendingNavigation = navigation
         beginNavigation()
     }
@@ -338,3 +386,13 @@ final class WorkspaceViewController: UIViewController, WKNavigationDelegate, WKU
         showSettings()
     }
 }
+
+private final class NativeSettingsHandler: NSObject, WKScriptMessageHandlerWithReply {
+    weak var controller: WorkspaceViewController?
+    init(controller: WorkspaceViewController) { self.controller = controller }
+    func userContentController(_ userContentController: WKUserContentController, didReceive message: WKScriptMessage,
+                               replyHandler: @escaping (Any?, String?) -> Void) {
+        guard let controller else { replyHandler(nil, "bridgeUnavailable"); return }
+        controller.handleSettings(message, reply: replyHandler)
+    }
+}