refactor: remove category colors from units app

lib/units/units.ts

@@ -167,74 +167,6 @@ export function convertToAll(
   }
 }
 
-/**
- * Get category color for a measure (Tailwind class name)
- */
-export function getCategoryColor(measure: Measure): string {
-  const colorMap: Record<Measure, string> = {
-    angle: 'category-angle',
-    apparentPower: 'category-apparent-power',
-    area: 'category-area',
-    current: 'category-current',
-    digital: 'category-digital',
-    each: 'category-each',
-    energy: 'category-energy',
-    frequency: 'category-frequency',
-    illuminance: 'category-illuminance',
-    length: 'category-length',
-    mass: 'category-mass',
-    pace: 'category-pace',
-    partsPer: 'category-parts-per',
-    power: 'category-power',
-    pressure: 'category-pressure',
-    reactiveEnergy: 'category-reactive-energy',
-    reactivePower: 'category-reactive-power',
-    speed: 'category-speed',
-    temperature: 'category-temperature',
-    tempo: 'category-tempo',
-    time: 'category-time',
-    voltage: 'category-voltage',
-    volume: 'category-volume',
-    volumeFlowRate: 'category-volume-flow-rate',
-  };
-
-  return colorMap[measure];
-}
-
-/**
- * Get category color hex value for a measure
- */
-export function getCategoryColorHex(measure: Measure): string {
-  const colorMap: Record<Measure, string> = {
-    angle: '#f43f5e',          // Rose 500
-    apparentPower: '#8b5cf6',  // Violet 500
-    area: '#10b981',           // Emerald 500
-    current: '#f59e0b',        // Amber 500
-    digital: '#3b82f6',        // Blue 500
-    each: '#64748b',           // Slate 500
-    energy: '#f59e0b',         // Amber 500
-    frequency: '#8b5cf6',      // Violet 500
-    illuminance: '#eab308',    // Yellow 500
-    length: '#3b82f6',         // Blue 500
-    mass: '#10b981',           // Emerald 500
-    pace: '#14b8a6',           // Teal 500
-    partsPer: '#94a3b8',       // Slate 400
-    power: '#8b5cf6',          // Violet 500
-    pressure: '#6366f1',       // Indigo 500
-    reactiveEnergy: '#f59e0b', // Amber 500
-    reactivePower: '#8b5cf6',  // Violet 500
-    speed: '#14b8a6',          // Teal 500
-    temperature: '#ef4444',    // Red 500
-    tempo: '#f97316',          // Orange 500
-    time: '#6366f1',           // Indigo 500
-    voltage: '#f59e0b',        // Amber 500
-    volume: '#10b981',         // Emerald 500
-    volumeFlowRate: '#10b981', // Emerald 500
-  };
-
-  return colorMap[measure];
-}
-
 /**
  * Format measure name for display
  */