Fix/light mode

[mikeboe]

No description provided.

[Copilot]

Pull request overview

Updates theme handling and branding assets to improve light/dark mode behavior and surface theme switching on the login screen.

Changes:

• Add a dark/light mode toggle to the login page.
• Align global CSS variables with MUI’s data-mui-color-scheme attribute and add a theme “synchronizer” in the MUI provider.
• Add favicon/app icon assets and wire them into Next.js metadata.icons.

Reviewed changes

Copilot reviewed 4 out of 11 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/app/login/page.tsx	Adds a bottom-right theme toggle to the login page.
src/app/layout.tsx	Adds metadata.icons entries for favicon + Apple touch icon.
src/app/globals.css	Maps CSS variables to MUI’s data-mui-color-scheme attribute.
src/app/context/theme-provider.tsx	Adds a theme synchronization effect using useColorScheme().
public/maskable-icon.png	Adds a new maskable icon asset.
public/logo.svg	Adds a new logo asset.
public/icon-192x192.png	Adds a 192×192 app icon asset.
public/favicon-32x32.png	Adds a 32×32 favicon asset.
public/favicon-16x16.png	Adds a 16×16 favicon asset.
public/apple-touch-icon-180x180.png	Adds an Apple touch icon asset.
package.json	Adds SWC-related dev dependencies.
package-lock.json	Lockfile updates to reflect dependency changes.

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[Copilot]

ThemeSynchronizer sets an explicit mode ("dark"/"light") when there is no stored mode, even though the provider is configured with defaultMode="system". This overrides system-following behavior for new users and won’t react to later OS theme changes. Prefer leaving mode as "system" when nothing is stored (or explicitly calling setMode("system")), and avoid overriding it based on a one-time matchMedia read.

Suggested change

	const systemPrefersDark = window.matchMedia(
	"(prefers-color-scheme: dark)",
	).matches;
	setMode(systemPrefersDark ? "dark" : "light");
	setMode("system");