fix(ui): folds tokens for ML-denoise panel + screenshare popover (native-cinny audit 3/N)

- General ML noise-suppression panel: ungated --border-color/--bg-card/--bg-input/
  --accent-orange -> color.Surface.ContainerLine/Container, SurfaceVariant.Container,
  Primary.Main. (The lotusTerminal-gated Boot button keeps its TDS --accent-orange.)
- CallControls "Share your screen?" popover: --bg-surface/--bg-surface-border ->
  color.Surface.Container / ContainerLine.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/app/features/call/CallControls.tsx

@@ -3,6 +3,7 @@ import {
   Box,
   Button,
   Chip,
+  color,
   config,
   Icon,
   IconButton,
@@ -276,8 +277,8 @@ export function CallControls({ callEmbed }: CallControlsProps) {
               bottom: '110%',
               left: '50%',
               transform: 'translateX(-50%)',
-              background: 'var(--bg-surface)',
-              border: '1px solid var(--bg-surface-border)',
+              background: color.Surface.Container,
+              border: `${config.borderWidth.B300} solid ${color.Surface.ContainerLine}`,
               borderRadius: '0.75rem',
               padding: '1rem 1.25rem',
               zIndex: 100,