feat: add midnight theme (#5288)

web/src/components/ThemeSelect.tsx

-import { Monitor, Moon, Palette, Sun, Wallpaper } from "lucide-react";
+import { Monitor, Moon, MoonStar, Palette, Sun, Wallpaper } from "lucide-react";
 import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
 import { instanceStore } from "@/store";
 import { THEME_OPTIONS } from "@/utils/theme";
@@ -13,6 +13,7 @@ const THEME_ICONS: Record<string, JSX.Element> = {
   system: <Monitor className="w-4 h-4" />,
   default: <Sun className="w-4 h-4" />,
   "default-dark": <Moon className="w-4 h-4" />,
+  midnight: <MoonStar className="w-4 h-4" />,
   paper: <Palette className="w-4 h-4" />,
   whitewall: <Wallpaper className="w-4 h-4" />,
 };

web/src/store/instance.ts

@@ -22,7 +22,7 @@ import { createRequestKey } from "./store-utils";
 /**
  * Valid theme options
  */
-const VALID_THEMES = ["system", "default", "default-dark", "paper", "whitewall"] as const;
+const VALID_THEMES = ["system", "default", "default-dark", "midnight", "paper", "whitewall"] as const;
 export type Theme = (typeof VALID_THEMES)[number];
 
 /**

web/src/themes/midnight.css

+:root {
+  --background: oklch(0.14 0.003 270);
+  --foreground: oklch(0.92 0.003 270);
+  --card: oklch(0.18 0.003 270);
+  --card-foreground: oklch(0.92 0.003 270);
+  --popover: oklch(0.18 0.003 270);
+  --popover-foreground: oklch(0.9 0.003 270);
+  --primary: oklch(0.7 0.08 290);
+  --primary-foreground: oklch(0.14 0.003 270);
+  --secondary: oklch(0.2 0.005 290);
+  --secondary-foreground: oklch(0.88 0.003 270);
+  --muted: oklch(0.18 0.005 270);
+  --muted-foreground: oklch(0.7 0.003 270);
+  --accent: oklch(0.22 0.008 295);
+  --accent-foreground: oklch(0.92 0.003 270);
+  --destructive: oklch(0.55 0.1 25);
+  --destructive-foreground: oklch(0.95 0.005 270);
+  --border: oklch(0.25 0.005 270);
+  --input: oklch(0.3 0.008 270);
+  --ring: oklch(0.7 0.08 290);
+  --chart-1: oklch(0.7 0.12 295);
+  --chart-2: oklch(0.7 0.12 285);
+  --chart-3: oklch(0.64 0.1 300);
+  --chart-4: oklch(0.68 0.12 295);
+  --chart-5: oklch(0.75 0.15 305);
+  --sidebar: oklch(0.13 0.002 270);
+  --sidebar-foreground: oklch(0.92 0.003 270);
+  --sidebar-primary: oklch(0.7 0.08 290);
+  --sidebar-primary-foreground: oklch(0.14 0.003 270);
+  --sidebar-accent: oklch(0.22 0.008 295);
+  --sidebar-accent-foreground: oklch(0.92 0.003 270);
+  --sidebar-border: oklch(0.25 0.005 270);
+  --sidebar-ring: oklch(0.7 0.08 290);
+  --font-sans:
+    ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif,
+    "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
+  --font-serif: ui-serif, Georgia, Cambria, "Times New Roman", Times, serif;
+  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
+  --radius: 0.5rem;
+  --shadow-2xs: 0 1px 3px 0px hsl(0 0% 0% / 0.05);
+  --shadow-xs: 0 1px 3px 0px hsl(0 0% 0% / 0.05);
+  --shadow-sm: 0 1px 3px 0px hsl(0 0% 0% / 0.1), 0 1px 2px -1px hsl(0 0% 0% / 0.1);
+  --shadow: 0 1px 3px 0px hsl(0 0% 0% / 0.1), 0 1px 2px -1px hsl(0 0% 0% / 0.1);
+  --shadow-md: 0 1px 3px 0px hsl(0 0% 0% / 0.1), 0 2px 4px -1px hsl(0 0% 0% / 0.1);
+  --shadow-lg: 0 1px 3px 0px hsl(0 0% 0% / 0.1), 0 4px 6px -1px hsl(0 0% 0% / 0.1);
+  --shadow-xl: 0 1px 3px 0px hsl(0 0% 0% / 0.1), 0 8px 10px -1px hsl(0 0% 0% / 0.1);
+  --shadow-2xl: 0 1px 3px 0px hsl(0 0% 0% / 0.25);
+  --tracking-normal: 0em;
+  --spacing: 0.25rem;
+}
+
+@theme inline {
+  --color-background: var(--background);
+  --color-foreground: var(--foreground);
+  --color-card: var(--card);
+  --color-card-foreground: var(--card-foreground);
+  --color-popover: var(--popover);
+  --color-popover-foreground: var(--popover-foreground);
+  --color-primary: var(--primary);
+  --color-primary-foreground: var(--primary-foreground);
+  --color-secondary: var(--secondary);
+  --color-secondary-foreground: var(--secondary-foreground);
+  --color-muted: var(--muted);
+  --color-muted-foreground: var(--muted-foreground);
+  --color-accent: var(--accent);
+  --color-accent-foreground: var(--accent-foreground);
+  --color-destructive: var(--destructive);
+  --color-destructive-foreground: var(--destructive-foreground);
+  --color-border: var(--border);
+  --color-input: var(--input);
+  --color-ring: var(--ring);
+  --color-chart-1: var(--chart-1);
+  --color-chart-2: var(--chart-2);
+  --color-chart-3: var(--chart-3);
+  --color-chart-4: var(--chart-4);
+  --color-chart-5: var(--chart-5);
+  --color-sidebar: var(--sidebar);
+  --color-sidebar-foreground: var(--sidebar-foreground);
+  --color-sidebar-primary: var(--sidebar-primary);
+  --color-sidebar-primary-foreground: var(--sidebar-primary-foreground);
+  --color-sidebar-accent: var(--sidebar-accent);
+  --color-sidebar-accent-foreground: var(--sidebar-accent-foreground);
+  --color-sidebar-border: var(--sidebar-border);
+  --color-sidebar-ring: var(--sidebar-ring);
+  --font-sans: var(--font-sans);
+  --font-mono: var(--font-mono);
+  --font-serif: var(--font-serif);
+  --radius-sm: calc(var(--radius) - 4px);
+  --radius-md: calc(var(--radius) - 2px);
+  --radius-lg: var(--radius);
+  --radius-xl: calc(var(--radius) + 4px);
+  --shadow-2xs: var(--shadow-2xs);
+  --shadow-xs: var(--shadow-xs);
+  --shadow-sm: var(--shadow-sm);
+  --shadow: var(--shadow);
+  --shadow-md: var(--shadow-md);
+  --shadow-lg: var(--shadow-lg);
+  --shadow-xl: var(--shadow-xl);
+  --shadow-2xl: var(--shadow-2xl);
+}

web/src/types/modules/setting.d.ts

-type Theme = "system" | "default" | "default-dark" | "paper" | "whitewall";
+type Theme = "system" | "default" | "default-dark" | "midnight" | "paper" | "whitewall";

web/src/utils/theme.ts

 import defaultDarkThemeContent from "../themes/default-dark.css?raw";
+import midnightThemeContent from "../themes/midnight.css?raw";
 import paperThemeContent from "../themes/paper.css?raw";
 import whitewallThemeContent from "../themes/whitewall.css?raw";
 
-const VALID_THEMES = ["system", "default", "default-dark", "paper", "whitewall"] as const;
+const VALID_THEMES = ["system", "default", "default-dark", "midnight", "paper", "whitewall"] as const;
 type ValidTheme = (typeof VALID_THEMES)[number];
 
 const THEME_CONTENT: Record<ValidTheme, string | null> = {
   system: null, // System theme dynamically chooses between default and default-dark
   default: null,
   "default-dark": defaultDarkThemeContent,
+  midnight: midnightThemeContent,
   paper: paperThemeContent,
   whitewall: whitewallThemeContent,
 };
@@ -22,6 +24,7 @@ export const THEME_OPTIONS: ThemeOption[] = [
   { value: "system", label: "Sync with system" },
   { value: "default", label: "Light" },
   { value: "default-dark", label: "Dark" },
+  { value: "midnight", label: "Midnight" },
   { value: "paper", label: "Paper" },
   { value: "whitewall", label: "Whitewall" },
 ];
@@ -44,7 +47,7 @@ export const getSystemTheme = (): "default" | "default-dark" => {
  * Resolves the actual theme to apply based on user preference
  * If theme is "system", returns the system preference, otherwise returns the theme as-is
  */
-export const resolveTheme = (theme: string): "default" | "default-dark" | "paper" | "whitewall" => {
+export const resolveTheme = (theme: string): "default" | "default-dark" | "midnight" | "paper" | "whitewall" => {
   if (theme === "system") {
     return getSystemTheme();
   }