✨ feat: add dark/light theme toggle

apps/web/app/bootstrap/page.tsx

@@ -7,6 +7,7 @@ import { Button } from "@/components/ui/button";
 import { AuthFormCard, FormError } from "@/components/auth/auth-form-card";
 import { BrandMark } from "@/components/brand";
 import { FullScreenLoader } from "@/components/page-layout";
+import { ThemeToggle } from "@/components/theme-toggle";
 import { Input } from "@/components/ui/input";
 import { Label } from "@/components/ui/label";
 import { api } from "@/lib/api-client";
@@ -82,7 +83,8 @@ export default function BootstrapPage() {
   if (checkingStatus) return <FullScreenLoader label="Checking setup" />;
 
   return (
-    <main className="auth-grid flex min-h-screen items-center justify-center bg-sidebar p-5 sm:p-10">
+    <main className="auth-grid relative flex min-h-screen items-center justify-center bg-sidebar p-5 sm:p-10">
+      <ThemeToggle className="absolute top-5 right-5 sm:top-8 sm:right-8" />
       <div className="grid w-full max-w-5xl overflow-hidden border border-sidebar-border bg-background text-foreground shadow-[12px_12px_0_color-mix(in_oklch,var(--sidebar-primary)_18%,transparent)] lg:grid-cols-[0.8fr_1.2fr]">
         <section className="flex flex-col justify-between bg-primary p-8 text-primary-foreground sm:p-10">
           <BrandMark inverted />

apps/web/app/globals.css

@@ -89,40 +89,46 @@
   --sidebar-accent-foreground: oklch(0.96 0.01 95);
   --sidebar-border: oklch(0.31 0.025 80);
   --sidebar-ring: oklch(0.75 0.205 125);
+  color-scheme: light;
 }
 
 .dark {
-  --background: oklch(0.145 0 0);
-  --foreground: oklch(0.985 0 0);
-  --card: oklch(0.205 0 0);
-  --card-foreground: oklch(0.985 0 0);
-  --popover: oklch(0.205 0 0);
-  --popover-foreground: oklch(0.985 0 0);
-  --primary: oklch(0.922 0 0);
-  --primary-foreground: oklch(0.205 0 0);
-  --secondary: oklch(0.269 0 0);
-  --secondary-foreground: oklch(0.985 0 0);
-  --muted: oklch(0.269 0 0);
-  --muted-foreground: oklch(0.708 0 0);
-  --accent: oklch(0.269 0 0);
-  --accent-foreground: oklch(0.985 0 0);
-  --destructive: oklch(0.704 0.191 22.216);
-  --border: oklch(1 0 0 / 10%);
-  --input: oklch(1 0 0 / 15%);
-  --ring: oklch(0.556 0 0);
-  --chart-1: oklch(0.488 0.243 264.376);
-  --chart-2: oklch(0.696 0.17 162.48);
-  --chart-3: oklch(0.769 0.188 70.08);
-  --chart-4: oklch(0.627 0.265 303.9);
-  --chart-5: oklch(0.645 0.246 16.439);
-  --sidebar: oklch(0.205 0 0);
-  --sidebar-foreground: oklch(0.985 0 0);
-  --sidebar-primary: oklch(0.488 0.243 264.376);
-  --sidebar-primary-foreground: oklch(0.985 0 0);
-  --sidebar-accent: oklch(0.269 0 0);
-  --sidebar-accent-foreground: oklch(0.985 0 0);
-  --sidebar-border: oklch(1 0 0 / 10%);
-  --sidebar-ring: oklch(0.556 0 0);
+  --background: oklch(0.16 0.018 75);
+  --foreground: oklch(0.94 0.012 95);
+  --card: oklch(0.21 0.018 75);
+  --card-foreground: oklch(0.94 0.012 95);
+  --popover: oklch(0.19 0.018 75);
+  --popover-foreground: oklch(0.94 0.012 95);
+  --primary: oklch(0.75 0.205 125);
+  --primary-foreground: oklch(0.15 0.025 125);
+  --secondary: oklch(0.26 0.02 80);
+  --secondary-foreground: oklch(0.94 0.012 95);
+  --muted: oklch(0.24 0.016 80);
+  --muted-foreground: oklch(0.72 0.018 90);
+  --accent: oklch(0.28 0.04 112);
+  --accent-foreground: oklch(0.92 0.03 110);
+  --destructive: oklch(0.68 0.19 28);
+  --success: oklch(0.72 0.155 132);
+  --success-foreground: oklch(0.22 0.06 132);
+  --warning: oklch(0.78 0.14 76);
+  --warning-foreground: oklch(0.28 0.08 66);
+  --border: oklch(0.35 0.02 80);
+  --input: oklch(0.32 0.02 80);
+  --ring: oklch(0.75 0.205 125);
+  --chart-1: oklch(0.75 0.205 125);
+  --chart-2: oklch(0.66 0.16 205);
+  --chart-3: oklch(0.72 0.17 80);
+  --chart-4: oklch(0.62 0.16 50);
+  --chart-5: oklch(0.58 0.14 300);
+  --sidebar: oklch(0.13 0.018 75);
+  --sidebar-foreground: oklch(0.91 0.015 95);
+  --sidebar-primary: oklch(0.75 0.205 125);
+  --sidebar-primary-foreground: oklch(0.15 0.025 125);
+  --sidebar-accent: oklch(0.22 0.022 80);
+  --sidebar-accent-foreground: oklch(0.96 0.01 95);
+  --sidebar-border: oklch(0.28 0.022 80);
+  --sidebar-ring: oklch(0.75 0.205 125);
+  color-scheme: dark;
 }
 
 @layer base {
@@ -174,8 +180,8 @@
 
   .auth-grid {
     background-image:
-      linear-gradient(to right, color-mix(in oklch, white 9%, transparent) 1px, transparent 1px),
-      linear-gradient(to bottom, color-mix(in oklch, white 9%, transparent) 1px, transparent 1px);
+      linear-gradient(to right, color-mix(in oklch, var(--sidebar-foreground) 9%, transparent) 1px, transparent 1px),
+      linear-gradient(to bottom, color-mix(in oklch, var(--sidebar-foreground) 9%, transparent) 1px, transparent 1px);
     background-size: 36px 36px;
   }
 

apps/web/app/layout.tsx

@@ -1,4 +1,5 @@
 import type { Metadata } from "next";
+import { ThemeProvider } from "@/components/theme-provider";
 import "./globals.css";
 
 export const metadata: Metadata = {
@@ -8,8 +9,17 @@ export const metadata: Metadata = {
 
 export default function RootLayout({ children }: { children: React.ReactNode }) {
   return (
-    <html lang="en">
-      <body>{children}</body>
+    <html lang="en" suppressHydrationWarning>
+      <body>
+        <ThemeProvider
+          attribute="class"
+          defaultTheme="system"
+          enableSystem
+          disableTransitionOnChange
+        >
+          {children}
+        </ThemeProvider>
+      </body>
     </html>
   );
 }

apps/web/app/login/page.tsx

@@ -7,6 +7,7 @@ import { Button } from "@/components/ui/button";
 import { AuthFormCard, FormError } from "@/components/auth/auth-form-card";
 import { BrandLockup } from "@/components/brand";
 import { FullScreenLoader } from "@/components/page-layout";
+import { ThemeToggle } from "@/components/theme-toggle";
 import { Input } from "@/components/ui/input";
 import { Label } from "@/components/ui/label";
 import { authClient, signIn, useSession } from "@/lib/auth-client";
@@ -87,7 +88,8 @@ export default function LoginPage() {
         </p>
       </section>
 
-      <section className="flex items-center justify-center bg-background p-5 text-foreground sm:p-10">
+      <section className="relative flex items-center justify-center bg-background p-5 text-foreground sm:p-10">
+        <ThemeToggle className="absolute top-5 right-5 sm:top-8 sm:right-8" />
         <AuthFormCard
           title="Sign In"
           description="Use your administrator account to access Minikura."

apps/web/components/dashboard-layout.tsx

@@ -6,6 +6,7 @@ import { usePathname, useRouter } from "next/navigation";
 import { useEffect } from "react";
 import { BrandLockup } from "@/components/brand";
 import { FullScreenLoader } from "@/components/page-layout";
+import { ThemeToggle } from "@/components/theme-toggle";
 import { Avatar, AvatarFallback } from "@/components/ui/avatar";
 import { Button } from "@/components/ui/button";
 import {
@@ -161,6 +162,7 @@ export function DashboardLayout({ children }: { children: React.ReactNode }) {
           <span className="truncate font-mono text-[10px] font-bold uppercase tracking-[0.15em] text-muted-foreground">
             {currentPage ? `${currentPage.context} / ${currentPage.label}` : "Control plane"}
           </span>
+          <ThemeToggle className="ml-auto" />
         </header>
         <main className="min-w-0 flex-1 overflow-auto p-4 sm:p-6 lg:p-8">{children}</main>
       </SidebarInset>

apps/web/components/theme-provider.tsx

@@ -0,0 +1,11 @@
+"use client";
+
+import { ThemeProvider as NextThemesProvider } from "next-themes";
+import type * as React from "react";
+
+export function ThemeProvider({
+  children,
+  ...props
+}: React.ComponentProps<typeof NextThemesProvider>) {
+  return <NextThemesProvider {...props}>{children}</NextThemesProvider>;
+}

apps/web/components/theme-toggle.tsx

@@ -0,0 +1,59 @@
+"use client";
+
+import { Monitor, Moon, Sun } from "lucide-react";
+import { useTheme } from "next-themes";
+import { useEffect, useState } from "react";
+import { Button } from "@/components/ui/button";
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuRadioGroup,
+  DropdownMenuRadioItem,
+  DropdownMenuTrigger,
+} from "@/components/ui/dropdown-menu";
+import { cn } from "@/lib/cn";
+
+type ThemeToggleProps = {
+  className?: string;
+};
+
+export function ThemeToggle({ className }: ThemeToggleProps) {
+  const { theme, setTheme } = useTheme();
+  const [mounted, setMounted] = useState(false);
+
+  useEffect(() => {
+    setMounted(true);
+  }, []);
+
+  return (
+    <DropdownMenu>
+      <DropdownMenuTrigger asChild>
+        <Button
+          variant="outline"
+          size="icon-sm"
+          className={cn("relative", className)}
+          aria-label="Toggle theme"
+        >
+          <Sun className="size-4 scale-100 rotate-0 transition-transform dark:scale-0 dark:-rotate-90" />
+          <Moon className="absolute size-4 scale-0 rotate-90 transition-transform dark:scale-100 dark:rotate-0" />
+        </Button>
+      </DropdownMenuTrigger>
+      <DropdownMenuContent align="end" className="min-w-36">
+        <DropdownMenuRadioGroup value={mounted ? theme : undefined} onValueChange={setTheme}>
+          <DropdownMenuRadioItem value="light">
+            <Sun />
+            Light
+          </DropdownMenuRadioItem>
+          <DropdownMenuRadioItem value="dark">
+            <Moon />
+            Dark
+          </DropdownMenuRadioItem>
+          <DropdownMenuRadioItem value="system">
+            <Monitor />
+            System
+          </DropdownMenuRadioItem>
+        </DropdownMenuRadioGroup>
+      </DropdownMenuContent>
+    </DropdownMenu>
+  );
+}

apps/web/components/topology/topology-canvas.tsx

@@ -1,6 +1,7 @@
 "use client";
 
 import { Background, BackgroundVariant, Controls, MiniMap, Panel, ReactFlow } from "@xyflow/react";
+import { useTheme } from "next-themes";
 import { useCallback, useMemo, useState } from "react";
 import "@xyflow/react/dist/style.css";
 import { useGraphLayout } from "@/hooks/use-graph-layout";
@@ -15,6 +16,7 @@ interface TopologyCanvasProps {
 }
 
 export function TopologyCanvas({ graph }: TopologyCanvasProps) {
+  const { resolvedTheme } = useTheme();
   const [selectedNode, setSelectedNode] = useState<TopologyNodeData | null>(null);
   const [filters, setFilters] = useState<TopologyFilters>({
     showServers: true,
@@ -68,24 +70,25 @@ export function TopologyCanvas({ graph }: TopologyCanvasProps) {
         }}
         minZoom={0.1}
         maxZoom={1.5}
+        colorMode={resolvedTheme === "dark" ? "dark" : "light"}
         defaultEdgeOptions={{
           animated: false,
           type: "smoothstep",
           style: {
-            stroke: "#6f7565",
+            stroke: "var(--muted-foreground)",
             strokeWidth: 2,
             strokeDasharray: "5 5",
           },
           markerEnd: {
             type: "arrowclosed",
-            color: "#6f7565",
+            color: "var(--muted-foreground)",
             width: 20,
             height: 20,
           },
         }}
         proOptions={{ hideAttribution: true }}
       >
-        <Background variant={BackgroundVariant.Lines} color="#d2d0c5" gap={32} size={1} />
+        <Background variant={BackgroundVariant.Lines} color="var(--border)" gap={32} size={1} />
         <Controls
           showZoom
           showFitView
@@ -103,7 +106,7 @@ export function TopologyCanvas({ graph }: TopologyCanvasProps) {
             };
             return colors[data.status] || "#94a3b8";
           }}
-          maskColor="rgba(29, 31, 26, 0.08)"
+          maskColor="color-mix(in oklch, var(--foreground) 8%, transparent)"
           className="border bg-card/95 shadow-md backdrop-blur-sm"
         />
 

apps/web/components/topology/topology-primitives.tsx

@@ -42,7 +42,7 @@ export function HealthBadge({
       healthy: "bg-green-500",
       degraded: "bg-yellow-500",
       unhealthy: "bg-red-500",
-      unknown: "bg-gray-400",
+      unknown: "bg-muted-foreground",
     }[status];
 
     return (
@@ -100,10 +100,10 @@ export function TopologyNodeCard({
     <div
       className={cn(
         "rounded-lg border bg-card p-3 shadow-md hover:shadow-lg transition-all w-[300px]",
-        selected && "ring-2 ring-primary ring-offset-2 shadow-xl"
+        selected && "ring-2 ring-primary ring-offset-2 ring-offset-background shadow-xl"
       )}
     >
-      <Handle type="target" position={Position.Top} className="w-3 h-3 !bg-gray-400" />
+      <Handle type="target" position={Position.Top} className="h-3 w-3 !bg-muted-foreground" />
       <div className="space-y-2.5">
         <div className="flex items-start justify-between gap-2">
           <div className="flex items-center gap-2 flex-1 min-w-0">
@@ -119,7 +119,7 @@ export function TopologyNodeCard({
         </div>
         {children}
       </div>
-      <Handle type="source" position={Position.Bottom} className="w-3 h-3 !bg-gray-400" />
+      <Handle type="source" position={Position.Bottom} className="h-3 w-3 !bg-muted-foreground" />
     </div>
   );
 }

apps/web/package.json

@@ -55,6 +55,7 @@
     "elysia": "^1.4.29",
     "lucide-react": "^1.31.0",
     "next": "^16.3.0",
+    "next-themes": "^0.4.6",
     "postcss": "^8.5.26",
     "react": "^19.2.8",
     "react-dom": "^19.2.8",

bun.lock

@@ -81,6 +81,7 @@
         "elysia": "^1.4.29",
         "lucide-react": "^1.31.0",
         "next": "^16.3.0",
+        "next-themes": "^0.4.6",
         "postcss": "^8.5.26",
         "react": "^19.2.8",
         "react-dom": "^19.2.8",
@@ -1103,6 +1104,8 @@
 
     "next": ["next@16.3.0", "", { "dependencies": { "@next/env": "16.3.0", "@swc/helpers": "0.5.15", "baseline-browser-mapping": "^2.9.19", "caniuse-lite": "^1.0.30001579", "postcss": "8.5.23", "styled-jsx": "5.1.6" }, "optionalDependencies": { "@next/swc-darwin-arm64": "16.3.0", "@next/swc-darwin-x64": "16.3.0", "@next/swc-linux-arm64-gnu": "16.3.0", "@next/swc-linux-arm64-musl": "16.3.0", "@next/swc-linux-x64-gnu": "16.3.0", "@next/swc-linux-x64-musl": "16.3.0", "@next/swc-win32-arm64-msvc": "16.3.0", "@next/swc-win32-x64-msvc": "16.3.0", "sharp": "^0.35.3" }, "peerDependencies": { "@opentelemetry/api": "^1.1.0", "@playwright/test": "^1.51.1", "babel-plugin-react-compiler": "*", "react": "^18.2.0 || 19.0.0-rc-de68d2f4-20241204 || ^19.0.0", "react-dom": "^18.2.0 || 19.0.0-rc-de68d2f4-20241204 || ^19.0.0", "sass": "^1.3.0" }, "optionalPeers": ["@opentelemetry/api", "@playwright/test", "babel-plugin-react-compiler", "sass"], "bin": { "next": "dist/bin/next" } }, "sha512-NEdGOzH+08eTXMUp9UYkA99Nhi5N6Thrhc1jgFOQgfgnGK/dA2hRwBpXep+exdFQrnwlRf/3Wixyp8lLBUpE2A=="],
 
+    "next-themes": ["next-themes@0.4.6", "", { "peerDependencies": { "react": "^16.8 || ^17 || ^18 || ^19 || ^19.0.0-rc", "react-dom": "^16.8 || ^17 || ^18 || ^19 || ^19.0.0-rc" } }, "sha512-pZvgD5L0IEvX5/9GWyHMf3m8BKiVQwsCMHfoFosXtXBMnaS0ZnIJ9ST4b4NqLVKDEm8QBxoNNGNaBv2JNF6XNA=="],
+
     "node-fetch": ["node-fetch@2.7.0", "", { "dependencies": { "whatwg-url": "^5.0.0" }, "peerDependencies": { "encoding": "^0.1.0" }, "optionalPeers": ["encoding"] }, "sha512-c4FRfUm/dbcWZ7U+1Wq0AwCyFL+3nt2bEw05wfxSz+DWpWsitgmSgYmy2dQdWyKC1694ELPqMs/YzUSNozLt8A=="],
 
     "node-releases": ["node-releases@2.0.53", "", {}, "sha512-D9UOmYG3UH1V+ENW56t5QXBwJw1YEY18ruVeus89Rw+SyIgjPkCO84bRzO3uNIYosJbNwiabWVn48o3uJLjxFQ=="],