feat(keyboard): unify assistant voice and AI workflows

Merge dictation and AI controls into one assistant surface, preserve safe insertion and clipboard actions, and align settings and tests with the new flow.

OSGKeyboardUITests/EnglishKeyboardDeviceUITests.swift

@@ -1,11 +1,12 @@
 // EnglishKeyboardDeviceUITests.swift
 // OSGKeyboardUITests
 //
-// Physical-device pass: Notes-like host + the real keyboard extension.
-// Skips if OSGKeyboard is not enabled as the current keyboard.
+// Notes-like host + the real keyboard extension on device or simulator.
+// Skips only when OSGKeyboard is not enabled as the current keyboard.
 
 import XCTest
 
+@MainActor
 final class EnglishKeyboardDeviceUITests: XCTestCase {
     func testOSGKeyboardAppearsOnNotesHost() throws {
         let app = XCUIApplication()
@@ -26,9 +27,16 @@ final class EnglishKeyboardDeviceUITests: XCTestCase {
         }
         textView.tap()
 
+        let surfaceInHost = app.descendants(matching: .any)["assistant.surface"]
+        if surfaceInHost.waitForExistence(timeout: 8) {
+            return
+        }
+
         let keyboard = XCUIApplication(bundleIdentifier: "com.osgkeyboard.ios.keyboard")
+        let surfaceInExtension = keyboard.descendants(matching: .any)["assistant.surface"]
         let appeared = keyboard.wait(for: .runningForeground, timeout: 8)
             || keyboard.windows.firstMatch.waitForExistence(timeout: 8)
+            || surfaceInExtension.waitForExistence(timeout: 8)
         if !appeared {
             throw XCTSkip(
                 "OSGKeyboard extension is not the active keyboard on this device. Enable it in Settings ▸ Keyboard, then re-run."
@@ -36,7 +44,7 @@ final class EnglishKeyboardDeviceUITests: XCTestCase {
         }
 
         XCTAssertTrue(
-            keyboard.windows.firstMatch.exists,
+            keyboard.windows.firstMatch.exists || surfaceInExtension.exists,
             "OSGKeyboard extension window should be on screen"
         )
     }