responsivita: výšky grafů přes tailwind chart-*, viewport-fit=cover

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

frontend/tailwind.config.ts

@@ -1,10 +1,22 @@
 import type { Config } from 'tailwindcss'
 
+/** Responsivní výšky grafů: mobil chart-sm, tablet chart-md, desktop chart-lg (ekonomika chart-xl). */
+const chartHeights = {
+  'chart-sm': '140px',
+  'chart-md': '200px',
+  'chart-lg': '260px',
+  'chart-xl': '280px',
+} as const
+
 export default {
   darkMode: 'class',
   content: ['./index.html', './src/**/*.{js,ts,jsx,tsx}'],
   theme: {
-    extend: {},
+    extend: {
+      height: chartHeights,
+      maxHeight: chartHeights,
+      minHeight: chartHeights,
+    },
   },
   plugins: [],
 } satisfies Config