Add support for PiKVM Switch and related features

This commit introduces several new components and improvements:
- Added Switch module with firmware update and configuration support
- Implemented new media streaming capabilities
- Updated various UI elements and CSS styles
- Enhanced keyboard and mouse event handling
- Added new validators and configuration options
- Updated Python version support to 3.13
- Improved error handling and logging

kvmd/plugins/hid/otg/events.py

@@ -27,6 +27,7 @@ from ....keyboard.mappings import UsbKey
 from ....keyboard.mappings import KEYMAP
 
 from ....mouse import MouseRange
+from ....mouse import MouseDelta
 
 
 # =====
@@ -144,8 +145,8 @@ class MouseRelativeEvent(BaseEvent):
     delta_y: int
 
     def __post_init__(self) -> None:
-        assert -127 <= self.delta_x <= 127
-        assert -127 <= self.delta_y <= 127
+        assert MouseDelta.MIN <= self.delta_x <= MouseDelta.MAX
+        assert MouseDelta.MIN <= self.delta_y <= MouseDelta.MAX
 
 
 @dataclasses.dataclass(frozen=True)
@@ -154,8 +155,8 @@ class MouseWheelEvent(BaseEvent):
     delta_y: int
 
     def __post_init__(self) -> None:
-        assert -127 <= self.delta_x <= 127
-        assert -127 <= self.delta_y <= 127
+        assert MouseDelta.MIN <= self.delta_x <= MouseDelta.MAX
+        assert MouseDelta.MIN <= self.delta_y <= MouseDelta.MAX
 
 
 def make_mouse_report(

kvmd/plugins/hid/otg/mouse.py

@@ -153,7 +153,6 @@ class MouseProcess(BaseDeviceProcess):
             move_x = self.__x
             move_y = self.__y
         else:
-            assert self.__x == self.__y == 0
             if relative_event is not None:
                 move_x = relative_event.delta_x
                 move_y = relative_event.delta_y
@@ -177,5 +176,3 @@ class MouseProcess(BaseDeviceProcess):
 
     def __clear_state(self) -> None:
         self.__pressed_buttons = 0
-        self.__x = 0
-        self.__y = 0