[fix] restore Windows remote keyboard shortcuts and input recovery

apps/desktop/src/gui/features/input/captured_keyboard_queue.h

@@ -0,0 +1,75 @@
+/*
+ * @Author: DI JUNKUN
+ * @Date: 2026-10-09
+ * Copyright (c) 2026 by DI JUNKUN, All Rights Reserved.
+ */
+
+#ifndef _CAPTURED_KEYBOARD_QUEUE_H_
+#define _CAPTURED_KEYBOARD_QUEUE_H_
+
+#include <array>
+#include <cstddef>
+#include <mutex>
+#include <vector>
+
+#include "keyboard_state.h"
+
+namespace crossdesk {
+
+class CapturedKeyboardQueue {
+ public:
+  struct Batch {
+    std::vector<KeyboardInput> events;
+    bool resync = false;
+    PressedKeys pressed;
+  };
+
+  void Push(const KeyboardInput& input) {
+    std::lock_guard lock(mutex_);
+    if (input.is_down)
+      pressed_[input.key_code] =
+          {input.key_code, input.scan_code, input.extended};
+    else
+      pressed_.erase(input.key_code);
+
+    if (resync_) return;
+    if (count_ == kCapacity) {
+      // The event history is incomplete. Retain the authoritative state,
+      // including releases, rather than dropping arbitrary key edges.
+      count_ = 0;
+      resync_ = true;
+      return;
+    }
+    events_[count_++] = input;
+  }
+
+  Batch Drain() {
+    std::lock_guard lock(mutex_);
+    Batch batch;
+    batch.resync = resync_;
+    if (resync_) batch.pressed = pressed_;
+    else batch.events.assign(events_.begin(), events_.begin() + count_);
+    count_ = 0;
+    resync_ = false;
+    return batch;
+  }
+
+  void Clear() {
+    std::lock_guard lock(mutex_);
+    count_ = 0;
+    resync_ = false;
+    pressed_.clear();
+  }
+
+ private:
+  static constexpr size_t kCapacity = 512;
+  std::mutex mutex_;
+  std::array<KeyboardInput, kCapacity> events_{};
+  size_t count_ = 0;
+  bool resync_ = false;
+  PressedKeys pressed_;
+};
+
+}  // namespace crossdesk
+
+#endif