refactor: remove device Pairing feature entirely (issue #645) (#650)

* refactor: remove device Pairing feature entirely (issue #645)

- Delete Pairing.kt model + pairing API endpoints (get/approve/revoke/clear)
- Delete PairingScreen/PairingViewModel + PairingCodeEntryScreen/ViewModel
- Remove NavKeys, ScreenRegistry drawer entry, Navigation.kt entry + Landing pairing button
- Remove pairing string resources (en + ko); keep connect_* config-parse strings
- Keep Telegram onboarding pairing_id flow (separate concept, per issue)
- Fix related doc comments + remaining test reference

* test: fix racy CONNECTED read in gated-mode WS test (issue #635 test)

testGatedMode_attemptsTicketFetchWithoutBareCookie asserted CONNECTED
immediately after the server-side onOpen latch fired, racing the client
handshake (WsListenerImpl sets CONNECTED on receipt of the 101). Await the
real status transition via connectionStatus.first{==CONNECTED} like the
other connect tests do. No product behavior changed.

---------

Co-authored-by: M57 <Hy4ri@users.noreply.github.com>

app/src/main/java/com/m57/hermescontrol/Navigation.kt

@@ -67,7 +67,6 @@ import com.m57.hermescontrol.ui.settings.SettingsViewModel
 import kotlinx.coroutines.launch
 import com.m57.hermescontrol.ui.authlogin.AuthLoginScreen as AuthLoginScreenContent
 import com.m57.hermescontrol.ui.landing.LandingScreen as LandingScreenContent
-import com.m57.hermescontrol.ui.pairing.PairingCodeEntryScreen as PairingCodeEntryScreenContent
 
 // NOTE: if a new Settings drill-down screen is added, its NavKey MUST be added
 // here too, or the bottom-nav Settings highlight will drop on that sub-page.
@@ -113,9 +112,6 @@ private fun appEntryProvider(
             onAuthLogin = {
                 NavigationController.navigateTo(AuthLoginScreen)
             },
-            onPairingLogin = {
-                NavigationController.navigateTo(PairingCodeEntryScreen)
-            },
         )
         // Landing doesn't use HermesScaffold — opt out of drawer gestures explicitly (issue #619).
         DisableDrawerGestures()
@@ -133,18 +129,6 @@ private fun appEntryProvider(
         DisableDrawerGestures()
     }
 
-    entry<PairingCodeEntryScreen> {
-        PairingCodeEntryScreenContent(
-            onConnected = {
-                NavigationController.resetTo(ChatScreen)
-            },
-            onBack = {
-                NavigationController.goBack()
-            },
-        )
-        DisableDrawerGestures()
-    }
-
     ScreenRegistry.ALL_SCREENS.forEach { screen ->
         addEntryProvider(clazz = screen.key::class) {
             screen.content(sessionId, openDrawer)
@@ -231,8 +215,7 @@ fun MainNavigation(sessionId: String? = null) {
 
     val showBottomBar =
         currentScreen != LandingScreen &&
-            currentScreen != AuthLoginScreen &&
-            currentScreen != PairingCodeEntryScreen
+            currentScreen != AuthLoginScreen
 
     val openDrawer: () -> Unit = { scope.launch { drawerState.open() } }