Improve layout and visual spacing across the application

Adjust main content width, header height, and text sizes for better desktop experience and implement responsive spacing for better visual hierarchy.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: cc8ba926-557c-4bf1-a2ea-ceabbcf38824
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/1957c339-2757-4d1f-8e92-e9f71a1ce58e/cc8ba926-557c-4bf1-a2ea-ceabbcf38824/sQ6VYZc

client/src/components/Layout.tsx

@@ -91,10 +91,10 @@ export default function Layout({ children }: LayoutProps) {
         {!isMobile && <Sidebar />}
         
         <main className={`flex-1 flex flex-col overflow-hidden ${
-          isMobile ? 'ml-0' : sidebarCollapsed ? 'ml-16' : 'ml-64'
+          isMobile ? 'ml-0' : sidebarCollapsed ? 'ml-16' : 'ml-72 xl:ml-80'
         }`}>
           {/* Header with store selector for admin */}
-          <header className="h-16 bg-white dark:bg-gray-800 border-b border-gray-200 dark:border-gray-700 flex items-center justify-between px-4 sm:px-6">
+          <header className="h-20 xl:h-24 bg-white dark:bg-gray-800 border-b border-gray-200 dark:border-gray-700 flex items-center justify-between px-6 sm:px-8 xl:px-12">
             <div className="flex items-center gap-4">
               {/* Mobile menu button */}
               {isMobile && (
@@ -107,7 +107,7 @@ export default function Layout({ children }: LayoutProps) {
                   {mobileMenuOpen ? <X className="h-5 w-5" /> : <Menu className="h-5 w-5" />}
                 </Button>
               )}
-              <h1 className="text-lg font-medium text-gray-800 dark:text-gray-200">LogiFlow</h1>
+              <h1 className="text-xl xl:text-2xl font-semibold text-gray-800 dark:text-gray-200">LogiFlow</h1>
             </div>
 
             {/* Store selector for admin - moved to top right */}
@@ -155,7 +155,7 @@ export default function Layout({ children }: LayoutProps) {
                         <div className="flex items-center gap-2">
                           <div 
                             className="w-3 h-3" 
-                            style={{ backgroundColor: store.color }}
+                            style={{ backgroundColor: store.color || '#6B7280' }}
                           />
                           <span>{store.name}</span>
                         </div>
@@ -168,9 +168,11 @@ export default function Layout({ children }: LayoutProps) {
           </header>
 
           {/* Main content area */}
-          <div className="flex-1 overflow-auto bg-gray-50 dark:bg-gray-900 p-4 sm:p-6">
+          <div className="flex-1 bg-gray-50 dark:bg-gray-900 p-6 sm:p-8 xl:p-12 overflow-y-auto">
             <div className="container-responsive">
-              {children}
+              <div className="desktop-spacing">
+                {children}
+              </div>
             </div>
           </div>
         </main>

client/src/components/Sidebar.tsx

@@ -259,13 +259,13 @@ export default function Sidebar() {
   }
 
   return (
-    <aside className={`${isCollapsed ? 'w-16' : 'w-64'} bg-white dark:bg-gray-800 border-r border-gray-200 dark:border-gray-700 flex flex-col shadow-lg transition-all duration-300 ease-in-out`}>
+    <aside className={`${isCollapsed ? 'w-16' : 'w-72 xl:w-80'} bg-white dark:bg-gray-800 border-r border-gray-200 dark:border-gray-700 flex flex-col shadow-xl transition-all duration-300 ease-in-out`}>
       {/* Logo et bouton de collapse */}
-      <div className="h-16 flex items-center justify-between border-b border-gray-200 dark:border-gray-700 bg-white dark:bg-gray-800 px-3">
+      <div className="h-20 xl:h-24 flex items-center justify-between border-b border-gray-200 dark:border-gray-700 bg-white dark:bg-gray-800 px-4 xl:px-6">
         {!isCollapsed && (
           <div className="flex items-center space-x-3">
             <Store className="h-6 w-6 text-blue-600 dark:text-blue-400" />
-            <span className="text-lg font-semibold text-gray-900 dark:text-gray-100">LogiFlow</span>
+            <span className="text-xl xl:text-2xl font-bold text-gray-900 dark:text-gray-100">LogiFlow</span>
           </div>
         )}
         {isCollapsed && (
@@ -290,8 +290,8 @@ export default function Sidebar() {
       </div>
 
       {/* Navigation */}
-      <nav className="flex-1 py-4 px-3">
-        <div className="space-y-1">
+      <nav className="flex-1 py-6 xl:py-8 px-4 xl:px-6">
+        <div className="space-y-2 xl:space-y-3">
           {menuItems.map((item) => {
             const hasRolePermission = hasPermission(item.roles);
             // console.log(`🔍 Menu item ${item.path} (${item.label}):`, { 
@@ -374,7 +374,7 @@ export default function Sidebar() {
               </h3>
             </div>
           )}
-          <div className="space-y-1">
+          <div className="space-y-2 xl:space-y-3">
             {adminItems.map((item) => {
               if (!hasPermission(item.roles)) return null;