Tello4Quest2 v0.5

The colour path was rebuilt from the ground up after tracing a washed-out, undersaturated image back to two concrete bugs: chroma was never range-expanded (12% of saturation silently lost), and the shader output gamma-encoded RGB into a Linear-colour-space project, so the hardware sRGB-encoded it a second time. The shader also had no stereo instancing boilerplate at all, meaning both eyes were rendering the left eye's projection. Alongside that: the decoder now drains its full output queue (latency was climbing monotonically through a flight), waits for a keyframe before feeding, and restarts itself if it stalls; the UI panels no longer rebuild their canvases every frame (framerate used to degrade steadily as a flight went on, and dynamic resolution followed it down); and Settings became two gamepad-navigable pages — Video and Flight — with proper graduated sliders and toggle switches instead of the old fill-bar.