feat(01-02): portal layout with header, sidebar, theme toggle, locale switcher

- Zustand sidebar store with persist middleware (collapse/expand, mobile open) - Sticky header with logo, breadcrumb, theme toggle, locale switcher, user avatar - Collapsible sidebar with Dashboard/Marketplace nav, accordion categories, footer - Mobile responsive: hamburger menu with overlay sidebar on small screens - Theme toggle cycling light/dark/system with mounted guard - Locale switcher setting NEXT_LOCALE cookie with router.refresh - Empty dashboard state with grid icon, "Keine Widgets aktiv" text, add button - AppShell composing header + sidebar + responsive main content area - All user-visible strings via useTranslations (UI-03 compliance)
2026-06-18 10:27:46 +02:00
parent f3791c6cdd
commit 6039387857
12 changed files with 577 additions and 9 deletions
@@ -0,0 +1,98 @@
+'use client';
+
+import { useTheme } from 'next-themes';
+import { useTranslations } from 'next-intl';
+import { useEffect, useState } from 'react';
+
+export function ThemeToggle() {
+  const { theme, setTheme } = useTheme();
+  const t = useTranslations('theme');
+  const [mounted, setMounted] = useState(false);
+
+  useEffect(() => {
+    setMounted(true);
+  }, []);
+
+  function cycleTheme() {
+    if (theme === 'light') {
+      setTheme('dark');
+    } else if (theme === 'dark') {
+      setTheme('system');
+    } else {
+      setTheme('light');
+    }
+  }
+
+  const label = mounted
+    ? theme === 'light'
+      ? t('light')
+      : theme === 'dark'
+        ? t('dark')
+        : t('system')
+    : '';
+
+  return (
+    <button
+      onClick={cycleTheme}
+      className="inline-flex items-center justify-center rounded-md p-2 text-muted-foreground hover:bg-muted hover:text-foreground transition-colors"
+      aria-label={label}
+      title={label}
+    >
+      {!mounted ? (
+        <span className="h-5 w-5" />
+      ) : theme === 'light' ? (
+        <svg
+          xmlns="http://www.w3.org/2000/svg"
+          width="20"
+          height="20"
+          viewBox="0 0 24 24"
+          fill="none"
+          stroke="currentColor"
+          strokeWidth="2"
+          strokeLinecap="round"
+          strokeLinejoin="round"
+        >
+          <circle cx="12" cy="12" r="5" />
+          <line x1="12" y1="1" x2="12" y2="3" />
+          <line x1="12" y1="21" x2="12" y2="23" />
+          <line x1="4.22" y1="4.22" x2="5.64" y2="5.64" />
+          <line x1="18.36" y1="18.36" x2="19.78" y2="19.78" />
+          <line x1="1" y1="12" x2="3" y2="12" />
+          <line x1="21" y1="12" x2="23" y2="12" />
+          <line x1="4.22" y1="19.78" x2="5.64" y2="18.36" />
+          <line x1="18.36" y1="5.64" x2="19.78" y2="4.22" />
+        </svg>
+      ) : theme === 'dark' ? (
+        <svg
+          xmlns="http://www.w3.org/2000/svg"
+          width="20"
+          height="20"
+          viewBox="0 0 24 24"
+          fill="none"
+          stroke="currentColor"
+          strokeWidth="2"
+          strokeLinecap="round"
+          strokeLinejoin="round"
+        >
+          <path d="M21 12.79A9 9 0 1 1 11.21 3 7 7 0 0 0 21 12.79z" />
+        </svg>
+      ) : (
+        <svg
+          xmlns="http://www.w3.org/2000/svg"
+          width="20"
+          height="20"
+          viewBox="0 0 24 24"
+          fill="none"
+          stroke="currentColor"
+          strokeWidth="2"
+          strokeLinecap="round"
+          strokeLinejoin="round"
+        >
+          <rect x="2" y="3" width="20" height="14" rx="2" ry="2" />
+          <line x1="8" y1="21" x2="16" y2="21" />
+          <line x1="12" y1="17" x2="12" y2="21" />
+        </svg>
+      )}
+    </button>
+  );
+}