Add quick resume

src/activities/boot_sleep/SleepActivity.h

@@ -16,8 +16,8 @@ struct BookOverlayInfo {
 
 class SleepActivity final : public Activity {
  public:
-  explicit SleepActivity(GfxRenderer& renderer, MappedInputManager& mappedInput)
-      : Activity("Sleep", renderer, mappedInput) {}
+  explicit SleepActivity(GfxRenderer& renderer, MappedInputManager& mappedInput, bool fromTimeout = false)
+      : Activity("Sleep", renderer, mappedInput), fromTimeout(fromTimeout) {}
   void onEnter() override;
 
  private:
@@ -28,5 +28,9 @@ class SleepActivity final : public Activity {
                                bool topAlignForCoverFit = false) const;
   void renderBlankSleepScreen() const;
   void renderOverlaySleepScreen() const;
+  // Quick Resume: leaves the framebuffer (reader page) intact and overlays a small moon icon.
+  void renderLastScreenSleepScreen() const;
   BookOverlayInfo getBookOverlayInfo(const std::string& bookPath) const;
+
+  const bool fromTimeout = false;
 };