AI-assisted PR validation: Fix stale HDR metadata on initial SDR

[DmitriiPetukhov]

GitHub username: DmitriiPetukhov
Target repository: hyprwm/Hyprland
Target branch: main
Source branch: fix/clear-stale-hdr-metadata
Modified files:

• src/render/Renderer.cpp
  Nature of change: bugfix

Summary: Fix the initial SDR path in handleFullscreenSettings so Hyprland clears stale HDR metadata left on an external monitor at startup. The patch preserves the existing HDR transition, surface metadata, and changed metadata paths. The change was reproduced on CachyOS with an LG UltraGear HDR monitor and verified with the complete CTest suite.

[fxzzi]

ladies and gentlemen we got him

[DmitriiPetukhov]

OMG I'm very sorry, I haven't even noticed the agent opened this. I was working in my own fork.
I had oversaturated colors on my LG UltraGear, and used Codex to investigate and fix it. Just wanted to test it for a week or two before opening a PR to the upstream. But, if you don't mind, could you check and let me know what you think?
DmitriiPetukhov#1