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/data/remote/HermesApiService.kt

@@ -53,9 +53,6 @@ import com.m57.hermescontrol.data.model.OAuthProvidersResponse
 import com.m57.hermescontrol.data.model.OAuthStartResponse
 import com.m57.hermescontrol.data.model.OAuthSubmitRequest
 import com.m57.hermescontrol.data.model.OAuthSubmitResponse
-import com.m57.hermescontrol.data.model.PairingApproveRequest
-import com.m57.hermescontrol.data.model.PairingResponse
-import com.m57.hermescontrol.data.model.PairingRevokeRequest
 import com.m57.hermescontrol.data.model.PluginProvidersPutRequest
 import com.m57.hermescontrol.data.model.PluginsHubResponse
 import com.m57.hermescontrol.data.model.PortalResponse
@@ -353,22 +350,6 @@ interface HermesApiService {
     @GET("api/plugins/hermes-achievements/recent-unlocks")
     suspend fun getRecentUnlocks(): Response<List<RecentUnlock>>
 
-    @GET("api/pairing")
-    suspend fun getPairing(): Response<PairingResponse>
-
-    @POST("api/pairing/approve")
-    suspend fun approvePairing(
-        @Body body: PairingApproveRequest,
-    ): Response<Unit>
-
-    @POST("api/pairing/revoke")
-    suspend fun revokePairing(
-        @Body body: PairingRevokeRequest,
-    ): Response<Unit>
-
-    @POST("api/pairing/clear-pending")
-    suspend fun clearPendingPairing(): Response<Unit>
-
     @GET("api/config/raw")
     suspend fun getRawConfig(): Response<RawConfigResponse>