Chams: exact material styles, GUI dropdown, viewmodel hookup

- world_find_material now tries the exact requested style first (resident,
  then FindMaterial) before falling back to debugwhite/vgui white. The old
  candidate scan returned vgui/white for every style, so all materials looked
  flat.
- Add a real CK_DROPDOWN control (overlay list, outside-click close, config
  save) and use it for the Chams material selector.
- Chams viewmodel toggle included in config/UI.

1 files changed, 9 insertions, 6 deletions

diff --git a/CONTEXT.md b/CONTEXT.md
index c95095b..9233517 100644
--- a/CONTEXT.md
+++ b/CONTEXT.md
@@ -111,6 +111,10 @@ vocabulary / decisions.
 - **Category**: sidebar group. Movement, Combat, Visuals, Weapons, System.
 - **Card**: per-feature panel. Header always shows Active + Bind; body is a
   collapsible set of settings.
+- **Dropdown**: `CK_DROPDOWN` row with a value button; clicking opens an
+  overlay list below the row (above it near the window bottom). Clicking an
+  option sets the value and saves the config; clicking elsewhere closes it.
+  One dropdown is open at a time; it is not clipped by the card/content rect.
 - **Text layout**: measured with `ISurface::GetTextSize` and wrapped to the
   available width. Card headers, control rows, info rows, tooltips and toasts
   grow/wrap instead of truncating; there is no ellipsis truncation. The config
@@ -293,16 +297,15 @@ vocabulary / decisions.
   materials ignore ColorModulate. The shared material's flag and colour are
   restored to (false, white) after the draw.
 - Material lookup walks the `IMaterialSystem` list (`world_find_material`), with
-  `FindMaterial` (slot 71) as the fallback. The style index selects:
-  0 `models/debug/debugwhite`, 1 `debug/debugwireframevertexcolorignorez`,
-  2 `vgui/white_additive`, 3 `debug/debugtranslucentsinglecolor`,
-  4 `vgui/white`; if the requested style is unavailable it falls back to the
-  first available debugwhite candidate. The chosen material name is logged.
+  `FindMaterial` (slot 71) as the fallback. The **exact requested style** is
+  tried first (resident, then loaded on demand), and only if that fails does it
+  fall back to `models/debug/debugwhite`/`vgui/white`. Styles: Flat, Wireframe,
+  Additive glow, Solid, White. The chosen material name is logged.
 - `Viewmodel (hands/weapon)` also applies the override to entities whose class
   contains `viewmodel` or whose model path is `.../v_...`. The viewmodel gets
   only the normal-depth pass (no ignorez).
 - Feature is off by default; `[chams] active/bind/walls/viewmodel/material/r/g/b`,
-  with Through walls, Viewmodel, Material (0..4) and colour in the Visuals
+  with Through walls, Viewmodel, a Material dropdown and colour in the Visuals
   card.
 - This is a flat material override, not stencil outlines; depth handling is
   the simple ignorez/normal two-pass.