fix(layout): 헤더 오프셋 처리를 root layout으로 통일

src/app/(main)/project/workspace/[id]/page.tsx

@@ -302,7 +302,7 @@ export default function ProjectPage() {
 
   if (tasksLoading) {
      return (
-      <div className="flex flex-col h-full bg-background pt-16">
+      <div className="flex flex-col h-full bg-background">
         <div className="flex-1 flex gap-3 p-3 overflow-hidden">
           {[1, 2, 3].map((i) => (
             <div key={i} className="w-80 shrink-0 bg-card rounded-lg border border-border p-4 flex flex-col gap-3">
@@ -318,7 +318,7 @@ export default function ProjectPage() {
   }
 
   return (
-    <div className="flex flex-col h-full bg-background pt-16">
+    <div className="flex flex-col h-full bg-background">
       <div className="flex-1 flex overflow-hidden min-h-0 gap-2 lg:gap-3 p-2 sm:p-3 w-full">
 
         {/* 메인 콘텐츠 */}

src/app/layout.tsx

@@ -36,7 +36,7 @@ export default function RootLayout({
           <AuthProviders>
             <div className="h-full flex flex-col">
               <Header />
-              <div className="flex-1 min-w-0 overflow-auto scrollbar-gutter-stable">{children}</div>
+              <div className="flex-1 min-w-0 overflow-auto scrollbar-gutter-stable pt-16">{children}</div>
               <Toaster />
             </div>
           </AuthProviders>

src/components/shared/Container.tsx

@@ -9,7 +9,7 @@ export default function Container({
 }: ContainerProps) {
   return (
     <section
-      className={`w-full max-w-[1280px] px-10 mx-auto py-25 ${className || ""}`}
+      className={`w-full max-w-7xl px-10 mx-auto pb-25 pt-6 ${className || ""}`}
       {...props}
     >
       {children}