[fix] correct Windows remote control session routing and key mapping

apps/desktop/src/platform/windows/screen_capturer/screen_capturer_win.cpp

@@ -18,6 +18,7 @@
 #include "captured_nv12_frame.h"
 #include "captured_cursor_state.h"
 #include "dxgi_cursor_state.h"
+#include "interactive_desktop.h"
 #include "interactive_state.h"
 #include "named_pipe_deadline.h"
 #include "rd_log.h"
@@ -269,7 +270,7 @@ bool ParseSecureDesktopFrameResponse(const std::vector<uint8_t>& response,
   return true;
 }
 
-SecureDesktopServiceStatus QuerySecureDesktopServiceStatus() {
+SecureDesktopServiceStatus ReadSecureDesktopServiceStatus() {
   SecureDesktopServiceStatus status;
   std::vector<uint8_t> response;
   DWORD error_code = 0;
@@ -289,6 +290,14 @@ SecureDesktopServiceStatus QuerySecureDesktopServiceStatus() {
   if (!status.service_available) {
     status.error = json.value("error", std::string("service_unavailable"));
     status.error_code = json.value("code", 0u);
+    status.desktop_state_known = status.error == "service_session_mismatch";
+    return status;
+  }
+
+  if (!IsCurrentProcessSession(json.value("active_session_id", 0xFFFFFFFFu))) {
+    status.service_available = false;
+    status.desktop_state_known = true;
+    status.error = "service_session_mismatch";
     return status;
   }
 
@@ -326,6 +335,16 @@ SecureDesktopServiceStatus QuerySecureDesktopServiceStatus() {
   return status;
 }
 
+SecureDesktopServiceStatus QuerySecureDesktopServiceStatus() {
+  auto status = ReadSecureDesktopServiceStatus();
+  if (!status.service_available && IsCurrentSessionUserDesktopActive()) {
+    status.desktop_state_known = true;
+    status.capture_active = false;
+    status.interactive_stage = "user-desktop";
+  }
+  return status;
+}
+
 bool QuerySecureDesktopHelperCommand(DWORD session_id,
                                      const std::string& command,
                                      std::vector<uint8_t>* response_out,
@@ -1262,9 +1281,8 @@ void ScreenCapturerWin::SecureDesktopCaptureLoop() {
         } else if (IsTransientWindowsServiceStatusError(status.error)) {
           LOG_INFO(
               "Windows capturer secure desktop service temporarily "
-              "unavailable; "
-              "keeping last capture state: error={}, code={}",
-              status.error, status.error_code);
+              "unavailable: error={}, code={}, capture_active={}",
+              status.error, status.error_code, status.capture_active);
         } else {
           LOG_WARN(
               "Windows capturer secure desktop service unavailable: "

apps/desktop/src/platform/windows/screen_capturer/secure_desktop_status_poller.h

@@ -21,6 +21,7 @@ namespace crossdesk {
 
 struct SecureDesktopServiceStatus {
   bool service_available = false;
+  bool desktop_state_known = false;
   bool capture_active = false;
   bool helper_running = false;
   uint32_t helper_process_id = 0;
@@ -31,7 +32,7 @@ struct SecureDesktopServiceStatus {
   std::string error;
 
   void UpdateFrom(SecureDesktopServiceStatus latest) {
-    if (latest.service_available) {
+    if (latest.service_available || latest.desktop_state_known) {
       *this = std::move(latest);
     } else {
       // Failed IPC says nothing about the desktop. Retain the last confirmed