chore: import upstream snapshot with attribution

apps/sim/app/_shell/providers/theme-provider.tsx

@@ -0,0 +1,44 @@
+'use client'
+
+import { usePathname } from 'next/navigation'
+import type { ThemeProviderProps } from 'next-themes'
+import { ThemeProvider as NextThemesProvider } from 'next-themes'
+
+export function ThemeProvider({ children, ...props }: ThemeProviderProps) {
+  const pathname = usePathname()
+
+  // Force light mode on public/marketing pages, allow user preference elsewhere
+  const isLightModePage =
+    pathname === '/' ||
+    pathname.startsWith('/login') ||
+    pathname.startsWith('/signup') ||
+    pathname.startsWith('/reset-password') ||
+    pathname.startsWith('/sso') ||
+    pathname.startsWith('/terms') ||
+    pathname.startsWith('/privacy') ||
+    pathname.startsWith('/invite') ||
+    pathname.startsWith('/verify') ||
+    pathname.startsWith('/changelog') ||
+    pathname.startsWith('/chat') ||
+    pathname.startsWith('/blog') ||
+    pathname.startsWith('/resume') ||
+    pathname.startsWith('/oauth') ||
+    pathname.startsWith('/f/') ||
+    pathname.startsWith('/unsubscribe')
+
+  const forcedTheme = isLightModePage ? 'light' : undefined
+
+  return (
+    <NextThemesProvider
+      attribute='class'
+      defaultTheme='system'
+      enableSystem
+      disableTransitionOnChange
+      storageKey='sim-theme'
+      forcedTheme={forcedTheme}
+      {...props}
+    >
+      {children}
+    </NextThemesProvider>
+  )
+}