feat(themes): add Midnight theme (#41)

Graphite variant with pure black terminal and panel backgrounds.

Co-authored-by: maskar <Maskar@users.noreply.github.com>

Author: maskar

src/lib/look.ts

@@ -1,6 +1,7 @@
 export type LookPreset =
   | 'classic'
   | 'graphite'
+  | 'midnight'
   | 'indigo'
   | 'ember'
   | 'glacier'
@@ -24,6 +25,11 @@ export const LOOK_PRESETS: LookPresetOption[] = [
     label: 'Graphite',
     description: 'Cool neon blue with subtle glow',
   },
+  {
+    id: 'midnight',
+    label: 'Midnight',
+    description: 'Graphite with pure black terminals',
+  },
   {
     id: 'classic',
     label: 'Classic',

src/lib/monaco-theme.ts

@@ -29,6 +29,14 @@ const presetColors: Record<LookPreset, PresetColors> = {
     border: '#2e3e50',
     accent: '#2ec8ff',
   },
+  midnight: {
+    bgElevated: '#000000',
+    fg: '#d7e4f0',
+    fgMuted: '#9bb0c3',
+    fgSubtle: '#678197',
+    border: '#2e3e50',
+    accent: '#2ec8ff',
+  },
   indigo: {
     bgElevated: '#1c2038',
     fg: '#deddff',

src/lib/theme.ts

@@ -43,6 +43,7 @@ export const theme = {
 const terminalBackground: Record<LookPreset, string> = {
   classic: '#2d2e32',
   graphite: '#1c2630',
+  midnight: '#000000',
   indigo: '#1c2038',
   ember: '#211918',
   glacier: '#232e3a',

src/styles.css

@@ -171,6 +171,29 @@ html[data-look='graphite'] {
   --task-panel-bg: #1c2630;
 }
 
+html[data-look='midnight'] {
+  --bg: radial-gradient(130% 120% at 15% 0%, #253848 0%, #141c26 60%, #101418 100%);
+  --bg-elevated: #1c2630;
+  --bg-input: #19232e;
+  --bg-hover: #253240;
+  --bg-selected: #1c3e55;
+  --bg-selected-subtle: #1c3e5540;
+  --border: #2e3e50;
+  --border-subtle: #222e3a;
+  --border-focus: #2ec8ff;
+  --fg: #d7e4f0;
+  --fg-muted: #9bb0c3;
+  --fg-subtle: #678197;
+  --accent: #2ec8ff;
+  --accent-hover: #59d7ff;
+  --accent-text: #031018;
+  --link: #73dfff;
+  --island-bg: #192028;
+  --island-border: #2e3e50;
+  --task-container-bg: #161e28;
+  --task-panel-bg: #000000;
+}
+
 html[data-look='indigo'] {
   --bg: radial-gradient(130% 120% at 18% 0%, #202044 0%, #171c30 58%, #12151f 100%);
   --bg-elevated: #1c2038;