Design spec for the egui control panel overhaul. Addresses the
user-reported 'settings all look bad' by fixing the structural root
causes (flat 11-CollapsingHeader scroll, no styling, ragged sliders,
no presets) rather than a cosmetic reskin.
Key decisions captured:
- Chassis: right SidePanel (replaces floating Window)
- Theme: deep-space cyan/orange, hand-applied over Visuals::dark()
- Structure: 4 always-open framed cards + 6 collapsing sections
(11→10 groups; Renderer merges into Quality, fixing a latent
duplicate render_scale slider bug)
- Preset bar: Cinematic/Performance/Web/Custom with per-frame hash
detection of hand-edits
- Two-column Grid rows with unit suffixes + log scales on wide ranges
- Group-enable toggles in collapsing headers; standardized warning text
Non-goals explicit: no params/shader/physics changes, no custom font
binary, no painted toggle, no new deps.
xfy
c260b6fbfb