Tweak light theme, high contrast themes, and fix env null reference

plugins/themes-yaak/src/index.ts

@@ -2,6 +2,49 @@ import type { PluginDefinition } from '@yaakapp/api';
 
 export const plugin: PluginDefinition = {
   themes: [
+    {
+      id: 'high-contrast',
+      label: 'High Contrast Light',
+      dark: false,
+      base: {
+        surface: 'white',
+        surfaceHighlight: 'hsl(218,24%,93%)',
+        text: 'black',
+        textSubtle: 'hsl(217,24%,40%)',
+        textSubtlest: 'hsl(217,24%,40%)',
+        border: 'hsl(217,22%,50%)',
+        borderSubtle: 'hsl(217,22%,60%)',
+        primary: 'hsl(267,67%,47%)',
+        secondary: 'hsl(218,18%,53%)',
+        info: 'hsl(206,100%,36%)',
+        success: 'hsl(155,100%,26%)',
+        notice: 'hsl(45,100%,31%)',
+        warning: 'hsl(30,99%,34%)',
+        danger: 'hsl(334,100%,35%)',
+      },
+    },
+    {
+      id: 'high-contrast-dark',
+      label: 'High Contrast Dark',
+      dark: true,
+      base: {
+        surface: 'hsl(0,0%,0%)',
+        surfaceHighlight: 'hsl(0,0%,20%)',
+        text: 'hsl(0,0%,100%)',
+        textSubtle: 'hsl(0,0%,90%)',
+        textSubtlest: 'hsl(0,0%,80%)',
+        selection: 'hsl(276,100%,30%)',
+        surfaceActive: 'hsl(276,100%,30%)',
+        border: 'hsl(0,0%,60%)',
+        primary: 'hsl(266,100%,85%)',
+        secondary: 'hsl(242,20%,72%)',
+        info: 'hsl(208,100%,83%)',
+        success: 'hsl(150,100%,63%)',
+        notice: 'hsl(49,100%,77%)',
+        warning: 'hsl(28,100%,73%)',
+        danger: 'hsl(343,100%,79%)',
+      },
+    },
     {
       id: 'catppuccin-frappe',
       label: 'Catppuccin Frappé',