Add a dark mode toggle to the settings page

Worked for 46s

Readsrc/app/settings/page.tsx

Readsrc/lib/theme.ts

Createsrc/components/theme-toggle.tsx

Editsrc/lib/theme.ts

Editsrc/app/settings/page.tsx

Runbun test42 passed

Added a theme toggle under Settings → Appearance. It follows the system theme by default and remembers an explicit choice in localStorage.

3 files changed+84−6

src/app/settings/page.tsx+41−4src/components/theme-toggle.tsx+25src/lib/theme.ts+18−2

Want a keyboard shortcut for it too?