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/UITests/OnboardingTests.swift

@@ -4,12 +4,13 @@ final class OnboardingTests: XCTestCase {
     func testRejectsCleartextWithoutNetwork() {
         let app = XCUIApplication()
         app.launch()
-        let field = app.textFields["Yuvomi server URL"]
+        let field = app.textFields["server-url"]
         XCTAssertTrue(field.waitForExistence(timeout: 5))
         field.tap()
         field.typeText("http://family.example")
-        app.buttons["Connect securely"].tap()
-        XCTAssertTrue(app.staticTexts["connectionError"].waitForExistence(timeout: 3))
+        app.buttons["connect"].tap()
+        XCTAssertTrue(app.staticTexts["invalid-server"].waitForExistence(timeout: 3))
         XCTAssertTrue(field.exists)
+        XCTAssertEqual(app.webViews.count, 0)
     }
 }