MOVE: Theme to quick settings

frontend/src/context/ThemeContext.tsx

@@ -0,0 +1,27 @@
+import React, { createContext, useContext, useState, ReactNode } from "react";
+
+// Theme context and types
+interface ThemeContextType {
+  theme: string;
+  setTheme: (theme: string) => void;
+}
+
+const ThemeContext = createContext<ThemeContextType | undefined>(undefined);
+
+export const ThemeProvider = ({ children }: { children: ReactNode }) => {
+  const [theme, setTheme] = useState<string>("light");
+
+  return (
+    <ThemeContext.Provider value={{ theme, setTheme }}>
+      {children}
+    </ThemeContext.Provider>
+  );
+};
+
+export const useTheme = () => {
+  const context = useContext(ThemeContext);
+  if (!context) {
+    throw new Error("useTheme must be used within a ThemeProvider");
+  }
+  return context;
+};