First commit

src/context/SidebarContext.tsx

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+"use client";
+import React, { createContext, useContext, useState, useEffect } from "react";
+
+type SidebarContextType = {
+  isExpanded: boolean;
+  isMobileOpen: boolean;
+  isHovered: boolean;
+  activeItem: string | null;
+  openSubmenu: string | null;
+  toggleSidebar: () => void;
+  toggleMobileSidebar: () => void;
+  setIsHovered: (isHovered: boolean) => void;
+  setActiveItem: (item: string | null) => void;
+  toggleSubmenu: (item: string) => void;
+};
+
+const SidebarContext = createContext<SidebarContextType | undefined>(undefined);
+
+export const useSidebar = () => {
+  const context = useContext(SidebarContext);
+  if (!context) {
+    throw new Error("useSidebar must be used within a SidebarProvider");
+  }
+  return context;
+};
+
+export const SidebarProvider: React.FC<{ children: React.ReactNode }> = ({
+  children,
+}) => {
+  const [isExpanded, setIsExpanded] = useState(true);
+  const [isMobileOpen, setIsMobileOpen] = useState(false);
+  const [isMobile, setIsMobile] = useState(false);
+  const [isHovered, setIsHovered] = useState(false);
+  const [activeItem, setActiveItem] = useState<string | null>(null);
+  const [openSubmenu, setOpenSubmenu] = useState<string | null>(null);
+
+  useEffect(() => {
+    const handleResize = () => {
+      const mobile = window.innerWidth < 768;
+      setIsMobile(mobile);
+      if (!mobile) {
+        setIsMobileOpen(false);
+      }
+    };
+
+    handleResize();
+    window.addEventListener("resize", handleResize);
+
+    return () => {
+      window.removeEventListener("resize", handleResize);
+    };
+  }, []);
+
+  const toggleSidebar = () => {
+    setIsExpanded((prev) => !prev);
+  };
+
+  const toggleMobileSidebar = () => {
+    setIsMobileOpen((prev) => !prev);
+  };
+
+  const toggleSubmenu = (item: string) => {
+    setOpenSubmenu((prev) => (prev === item ? null : item));
+  };
+
+  return (
+    <SidebarContext.Provider
+      value={{
+        isExpanded: isMobile ? false : isExpanded,
+        isMobileOpen,
+        isHovered,
+        activeItem,
+        openSubmenu,
+        toggleSidebar,
+        toggleMobileSidebar,
+        setIsHovered,
+        setActiveItem,
+        toggleSubmenu,
+      }}
+    >
+      {children}
+    </SidebarContext.Provider>
+  );
+};

src/context/ThemeContext.tsx

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+"use client";
+
+import type React from "react";
+import { createContext, useState, useContext, useEffect } from "react";
+
+type Theme = "light" | "dark" | "system";
+
+type ThemeContextType = {
+  theme: Theme;
+  setTheme: (theme: Theme) => void;
+  toggleTheme: () => void;
+};
+
+const ThemeContext = createContext<ThemeContextType | undefined>(undefined);
+
+export const ThemeProvider: React.FC<{ children: React.ReactNode }> = ({
+  children,
+}) => {
+  const [theme, setThemeState] = useState<Theme>("system");
+  const [isInitialized, setIsInitialized] = useState(false);
+
+  useEffect(() => {
+    const savedTheme = localStorage.getItem("theme") as Theme | null;
+    const initialTheme = savedTheme || "system";
+    setThemeState(initialTheme);
+    setIsInitialized(true);
+  }, []);
+
+  useEffect(() => {
+    if (!isInitialized) return;
+
+    localStorage.setItem("theme", theme);
+    
+    const root = window.document.documentElement;
+    
+    if (theme === "system") {
+      const systemTheme = window.matchMedia("(prefers-color-scheme: dark)").matches
+        ? "dark"
+        : "light";
+      root.classList.remove("light", "dark");
+      root.classList.add(systemTheme);
+
+      // Listener for system theme changes
+      const mediaQuery = window.matchMedia("(prefers-color-scheme: dark)");
+      const handleChange = (e: MediaQueryListEvent) => {
+        root.classList.remove("light", "dark");
+        root.classList.add(e.matches ? "dark" : "light");
+      };
+      
+      mediaQuery.addEventListener("change", handleChange);
+      return () => mediaQuery.removeEventListener("change", handleChange);
+    } else {
+      root.classList.remove("light", "dark");
+      root.classList.add(theme);
+    }
+  }, [theme, isInitialized]);
+
+  const setTheme = (newTheme: Theme) => {
+    setThemeState(newTheme);
+  };
+
+  const toggleTheme = () => {
+    setThemeState((prev) => {
+        if (prev === 'system') {
+            return window.matchMedia("(prefers-color-scheme: dark)").matches ? 'light' : 'dark';
+        }
+        return prev === 'light' ? 'dark' : 'light';
+    });
+  };
+
+  return (
+    <ThemeContext.Provider value={{ theme, setTheme, toggleTheme }}>
+      {children}
+    </ThemeContext.Provider>
+  );
+};
+
+export const useTheme = () => {
+  const context = useContext(ThemeContext);
+  if (context === undefined) {
+    throw new Error("useTheme must be used within a ThemeProvider");
+  }
+  return context;
+};

src/context/ToastContext.tsx

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+"use client";
+
+import React, { createContext, useContext, useState, useCallback } from "react";
+
+export type ToastType = "success" | "error" | "warning" | "info";
+
+export interface ToastMessage {
+  id: string;
+  message: string;
+  type: ToastType;
+}
+
+interface ToastContextType {
+  addToast: (message: string, type?: ToastType) => void;
+  removeToast: (id: string) => void;
+  toasts: ToastMessage[];
+}
+
+const ToastContext = createContext<ToastContextType | undefined>(undefined);
+
+export const ToastProvider: React.FC<{ children: React.ReactNode }> = ({ children }) => {
+  const [toasts, setToasts] = useState<ToastMessage[]>([]);
+
+  const removeToast = useCallback((id: string) => {
+    setToasts((prev) => prev.filter((toast) => toast.id !== id));
+  }, []);
+
+  const addToast = useCallback((message: string, type: ToastType = "info") => {
+    const id = Math.random().toString(36).substring(2, 9);
+    const newToast = { id, message, type };
+    
+    // New toasts appear at the bottom
+    setToasts((prev) => [...prev, newToast]);
+
+    // Auto close after 5 seconds
+    setTimeout(() => {
+      removeToast(id);
+    }, 5000);
+  }, [removeToast]);
+
+  return (
+    <ToastContext.Provider value={{ addToast, removeToast, toasts }}>
+      {children}
+    </ToastContext.Provider>
+  );
+};
+
+export const useToast = () => {
+  const context = useContext(ToastContext);
+  if (!context) {
+    throw new Error("useToast must be used within a ToastProvider");
+  }
+  return context;
+};