feat: Add responsive sidebar collapse toggle for desktop (#834)

frontend/components/layout/DashboardAuthGuard.tsx

@@ -6,11 +6,14 @@ import { usePathname, useRouter } from 'next/navigation';
 import { Sidebar } from '@/components/layout/Sidebar';
 import { Header } from '@/components/layout/Header';
 import { ErrorBoundary } from '@/components/errors/ErrorBoundary';
+import { SidebarProvider, useSidebar } from '@/contexts/SidebarContext';
+import { cn } from '@/lib/utils';
 
-export function DashboardAuthGuard({ children }: { children: React.ReactNode }) {
+function DashboardContent({ children }: { children: React.ReactNode }) {
   const isAuthenticated = useAuthStore((state) => state.isAuthenticated);
   const router = useRouter();
   const pathname = usePathname();
+  const { isCollapsed } = useSidebar();
 
   const mainRef = React.useRef<HTMLDivElement>(null);
   const scrollPositions = React.useRef<Record<string, number>>({});
@@ -43,7 +46,7 @@ export function DashboardAuthGuard({ children }: { children: React.ReactNode })
   return (
     <div className="flex h-screen bg-gray-50">
       <Sidebar />
-      <div className="flex-1 flex flex-col overflow-hidden lg:ml-64">
+      <div className={cn('flex-1 flex flex-col overflow-hidden transition-all duration-200', isCollapsed ? 'lg:ml-20' : 'lg:ml-64')}>
         <Header />
         <main ref={mainRef} className="flex-1 overflow-y-auto p-4 sm:p-6">
           <ErrorBoundary context="dashboard-page" resetKey={pathname}>
@@ -54,3 +57,11 @@ export function DashboardAuthGuard({ children }: { children: React.ReactNode })
     </div>
   );
 }
+
+export function DashboardAuthGuard({ children }: { children: React.ReactNode }) {
+  return (
+    <SidebarProvider>
+      <DashboardContent>{children}</DashboardContent>
+    </SidebarProvider>
+  );
+}

frontend/components/layout/Sidebar.tsx

@@ -2,10 +2,11 @@
 
 import Link from 'next/link';
 import { usePathname, useRouter } from 'next/navigation';
-import { LayoutDashboard, Folder, FileText, Wallet, Scale, Menu, X, QrCode, ShieldCheck } from 'lucide-react';
+import { LayoutDashboard, Folder, FileText, Wallet, Scale, Menu, X, QrCode, ShieldCheck, ChevronLeft, ChevronRight } from 'lucide-react';
 import { useState } from 'react';
 import { Button } from '@/components/ui/button';
 import { cn } from '@/lib/utils';
+import { useSidebar } from '@/contexts/SidebarContext';
 
 const navigation = [
   { name: 'Dashboard', href: '/dashboard', icon: LayoutDashboard },
@@ -21,6 +22,7 @@ export function Sidebar() {
   const pathname = usePathname();
   const router = useRouter();
   const [isMobileOpen, setIsMobileOpen] = useState(false);
+  const { isCollapsed, setIsCollapsed } = useSidebar();
 
   return (
     <>
@@ -45,25 +47,38 @@ export function Sidebar() {
         role="navigation"
         aria-label="Main navigation"
         className={cn(
-          'fixed inset-y-0 left-0 z-40 w-64 bg-white border-r border-gray-200 transform transition-transform duration-200 ease-in-out lg:translate-x-0',
+          'fixed inset-y-0 left-0 z-40 bg-white border-r border-gray-200 transform transition-all duration-200 ease-in-out lg:translate-x-0',
+          isCollapsed ? 'w-20' : 'w-64',
           isMobileOpen ? 'translate-x-0' : '-translate-x-full lg:translate-x-0'
         )}
       >
         <div className="flex flex-col h-full">
           {/* Logo */}
-          <div className="flex items-center gap-2 px-6 py-6 border-b border-gray-200">
-            <div
-              className="w-8 h-8 rounded-lg bg-gradient-to-r from-blue-600 to-purple-600 flex items-center justify-center"
-              role="img"
-              aria-label="AgenticPay logo"
-            >
-              <Wallet className="h-5 w-5 text-white" aria-hidden="true" />
+          <div className={cn('flex items-center gap-2 px-6 py-6 border-b border-gray-200 justify-between', isCollapsed && 'px-3')}>
+            <div className="flex items-center gap-2 min-w-0">
+              <div
+                className="w-8 h-8 rounded-lg bg-gradient-to-r from-blue-600 to-purple-600 flex items-center justify-center flex-shrink-0"
+                role="img"
+                aria-label="AgenticPay logo"
+              >
+                <Wallet className="h-5 w-5 text-white" aria-hidden="true" />
+              </div>
+              {!isCollapsed && <span className="text-xl font-bold text-gray-900 truncate">AgenticPay</span>}
             </div>
-            <span className="text-xl font-bold text-gray-900">AgenticPay</span>
+            <Button
+              variant="ghost"
+              size="icon"
+              className="hidden lg:flex"
+              onClick={() => setIsCollapsed(!isCollapsed)}
+              aria-label={isCollapsed ? 'Expand sidebar' : 'Collapse sidebar'}
+              aria-expanded={!isCollapsed}
+            >
+              {isCollapsed ? <ChevronRight className="h-5 w-5" /> : <ChevronLeft className="h-5 w-5" />}
+            </Button>
           </div>
 
           {/* Navigation */}
-          <nav className="flex-1 px-4 py-6 space-y-1">
+          <nav className={cn('flex-1 py-6 space-y-1', isCollapsed ? 'px-2' : 'px-4')}>
             {navigation.map((item) => {
               const isActive =
                 item.href === '/dashboard'
@@ -77,41 +92,45 @@ export function Sidebar() {
                   onMouseEnter={() => router.prefetch(item.href)}
                   onFocus={() => router.prefetch(item.href)}
                   onClick={() => setIsMobileOpen(false)}
+                  title={isCollapsed ? item.name : undefined}
                   className={cn(
-                    'flex items-center gap-3 px-4 py-3 rounded-lg text-sm font-medium transition-colors focus:outline-none focus:ring-2 focus:ring-offset-1 focus:ring-blue-500',
+                    'flex items-center gap-3 rounded-lg text-sm font-medium transition-colors focus:outline-none focus:ring-2 focus:ring-offset-1 focus:ring-blue-500',
+                    isCollapsed ? 'px-2 py-3 justify-center' : 'px-4 py-3',
                     isActive
                       ? 'bg-gradient-to-r from-blue-50 to-purple-50 text-blue-700 border border-blue-100'
                       : 'text-gray-700 hover:bg-gray-50'
                   )}
                   aria-current={isActive ? 'page' : undefined}
                 >
                   <item.icon
-                    className={cn('h-5 w-5', isActive ? 'text-blue-600' : 'text-gray-500')}
+                    className={cn('h-5 w-5 flex-shrink-0', isActive ? 'text-blue-600' : 'text-gray-500')}
                     aria-hidden="true"
                   />
-                  {item.name}
+                  {!isCollapsed && <span className="truncate">{item.name}</span>}
                 </Link>
               );
             })}
           </nav>
 
           {/* User section */}
-          <div className="px-4 py-4 border-t border-gray-200">
+          <div className={cn('py-4 border-t border-gray-200', isCollapsed ? 'px-2' : 'px-4')}>
             <div
-              className="flex items-center gap-3 px-4 py-3 rounded-lg bg-gray-50"
+              className={cn('rounded-lg bg-gray-50', isCollapsed ? 'px-2 py-3 flex justify-center' : 'px-4 py-3 flex items-center gap-3')}
               role="region"
               aria-label="User information"
             >
               <div
-                className="w-10 h-10 rounded-full bg-gradient-to-r from-blue-500 to-purple-500 flex items-center justify-center text-white font-semibold"
+                className={cn('rounded-full bg-gradient-to-r from-blue-500 to-purple-500 flex items-center justify-center text-white font-semibold flex-shrink-0', isCollapsed ? 'w-8 h-8 text-xs' : 'w-10 h-10')}
                 aria-hidden="true"
               >
                 JD
               </div>
-              <div className="flex-1 min-w-0">
-                <p className="text-sm font-medium text-gray-900 truncate">John Doe</p>
-                <p className="text-xs text-gray-500 truncate">Freelancer</p>
-              </div>
+              {!isCollapsed && (
+                <div className="flex-1 min-w-0">
+                  <p className="text-sm font-medium text-gray-900 truncate">John Doe</p>
+                  <p className="text-xs text-gray-500 truncate">Freelancer</p>
+                </div>
+              )}
             </div>
           </div>
         </div>

frontend/contexts/SidebarContext.tsx

@@ -0,0 +1,28 @@
+'use client';
+
+import { createContext, useContext, useState, ReactNode } from 'react';
+
+interface SidebarContextType {
+  isCollapsed: boolean;
+  setIsCollapsed: (collapsed: boolean) => void;
+}
+
+const SidebarContext = createContext<SidebarContextType | undefined>(undefined);
+
+export function SidebarProvider({ children }: { children: ReactNode }) {
+  const [isCollapsed, setIsCollapsed] = useState(false);
+
+  return (
+    <SidebarContext.Provider value={{ isCollapsed, setIsCollapsed }}>
+      {children}
+    </SidebarContext.Provider>
+  );
+}
+
+export function useSidebar() {
+  const context = useContext(SidebarContext);
+  if (!context) {
+    throw new Error('useSidebar must be used within SidebarProvider');
+  }
+  return context;
+}