fix(ui): folds tokens for settings/profile/glass invented vars (native-cinny audit 2/N)

- DenoiseTester: --bg-card/--border-color/--accent-green/--accent-orange -> color.Surface.*/Success/Primary
- ProfileDecoration: --accent-cyan/--bg-surface-variant -> color.Primary.Main/SurfaceVariant.Container
- Profile: --tc-critical/warning-normal -> color.Critical/Warning.Main
- UserRoomProfile: --tc-positive/warning-normal/--tc-surface-low-contrast/--bg-surface-variant -> color tokens
- Sidebar glass: hardcoded rgba bg/border -> color-mix on color.Surface.Container + SurfaceVariant.ContainerLine
  (also fixes the glass looking wrong on light themes — was always near-black)

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

src/app/features/settings/general/DenoiseTester.tsx

@@ -1,5 +1,5 @@
 import React, { useCallback, useEffect, useRef, useState } from 'react';
-import { Box, Button, Text } from 'folds';
+import { Box, Button, color, config, Text } from 'folds';
 import { DenoiseModelId } from '../../../state/settings';
 import { DENOISE_MODELS } from '../../../utils/lotusDenoiseUtils';
 import {
@@ -49,8 +49,8 @@ function DbMeter({ label, db, threshold }: { label: string; db: number; threshol
         style={{
           position: 'relative',
           height: '12px',
-          background: 'var(--bg-card)',
-          border: '1px solid var(--border-color)',
+          background: color.Surface.Container,
+          border: `${config.borderWidth.B300} solid ${color.Surface.ContainerLine}`,
           borderRadius: '6px',
           overflow: 'hidden',
         }}
@@ -62,7 +62,7 @@ function DbMeter({ label, db, threshold }: { label: string; db: number; threshol
             left: 0,
             bottom: 0,
             width: `${pct}%`,
-            background: 'var(--accent-green)',
+            background: color.Success.Main,
             transition: 'width 0.05s linear',
           }}
         />
@@ -74,7 +74,7 @@ function DbMeter({ label, db, threshold }: { label: string; db: number; threshol
               bottom: 0,
               left: `${markerPct}%`,
               width: '2px',
-              background: 'var(--accent-orange)',
+              background: color.Primary.Main,
             }}
           />
         )}