[feat] add DeskHub stream controls and network status

apps/desktop/src/gui/features/gallery/preview_resolution.h

@@ -0,0 +1,55 @@
+/*
+ * @Author: DI JUNKUN
+ * @Date: 2026-10-12
+ * Copyright (c) 2026 by DI JUNKUN, All Rights Reserved.
+ */
+
+#ifndef _PREVIEW_RESOLUTION_H_
+#define _PREVIEW_RESOLUTION_H_
+
+#include <algorithm>
+#include <chrono>
+#include <cmath>
+
+namespace crossdesk::gallery {
+struct PreviewResolution {
+  int width = 0;
+  int height = 0;
+
+  bool operator==(const PreviewResolution& other) const {
+    return width == other.width && height == other.height;
+  }
+  static PreviewResolution Viewport(float width, float height, float scale) {
+    if (!std::isfinite(width) || !std::isfinite(height) ||
+        !std::isfinite(scale) || width <= 0 || height <= 0 || scale <= 0)
+      return {};
+    return {int(std::clamp(std::ceil(double(width) * scale), 2.0, 16384.0)),
+            int(std::clamp(std::ceil(double(height) * scale), 2.0, 16384.0))};
+  }
+};
+
+class PreviewResolutionDebouncer {
+ public:
+  using Clock = std::chrono::steady_clock;
+  PreviewResolution Update(PreviewResolution desired, Clock::time_point now,
+                           bool reset = false) {
+    if (!initialized_ || reset) {
+      initialized_ = true;
+      applied_ = candidate_ = desired;
+      changed_at_ = now;
+    } else if (!(candidate_ == desired)) {
+      candidate_ = desired;
+      changed_at_ = now;
+    } else if (now - changed_at_ >= std::chrono::milliseconds(200)) {
+      applied_ = candidate_;
+    }
+    return applied_;
+  }
+
+ private:
+  bool initialized_ = false;
+  PreviewResolution applied_, candidate_;
+  Clock::time_point changed_at_{};
+};
+}  // namespace crossdesk::gallery
+#endif