fix: CI test failures - headless stdin EOF handling on Linux and Windows, WM_APP_REQUEST_CLOSE handling on Windows

Author: 989tqT

plug.app/src/linux/api/intf/main_l.cpp

@@ -690,9 +690,10 @@ void main_l_cleanup(void) {
     if (g_cmd_thread.joinable()) {
         g_cmd_thread.join();
     }
-    // stdin worker blocks on getline; detach so it doesn't prevent exit
+    // stdin worker blocks on getline; close stdin to unblock it, then join
     if (g_headless_stdin_thread.joinable()) {
-        g_headless_stdin_thread.detach();
+        fclose(stdin);
+        g_headless_stdin_thread.join();
     }
     if (g_app) {
         g_object_unref(g_app);

plug.app/src/windows/api/intf/main_w.cpp

@@ -633,6 +633,11 @@ static LRESULT CALLBACK MainWndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM l
         std::cout << "---STATE_DUMP_END---\n" << std::endl;
         return 0;
     }
+    case WM_APP_REQUEST_CLOSE: { // WM_APP_REQUEST_CLOSE
+        g_running_ui = false;
+        DestroyWindow(hwnd);
+        return 0;
+    }
 #endif
     case WM_APP + 100: {
         std::lock_guard<std::mutex> lk(g_mutex);
@@ -1201,6 +1206,14 @@ static LRESULT CALLBACK MainWndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM l
         caret_cleanup();
         PostQuitMessage(0);
         break;
+#ifdef PLUG_ENABLE_HEADLESS_MODE
+    case WM_APP_REQUEST_CLOSE:
+        if (g_hwnd) {
+            g_running_ui = false;
+            DestroyWindow(g_hwnd);
+        }
+        break;
+#endif
     default:
         return DefWindowProc(hwnd, msg, wParam, lParam);
     }
@@ -1286,7 +1299,9 @@ extern "C" void main_w_cleanup(void) {
 
 #ifdef PLUG_ENABLE_HEADLESS_MODE
     if (g_headless_stdin_thread.joinable()) {
-        g_headless_stdin_thread.detach();
+        // Close stdin to unblock getline() in headless_stdin_worker
+        fclose(stdin);
+        g_headless_stdin_thread.join();
     }
 #endif
 }