revert(web): simplify <main> padding back to p-8 shorthand

The px-8 py-8 workaround was added after p-8 appeared broken, but the
root cause was an unlayered CSS reset clobbering Tailwind's physical
shorthand utilities (fixed in a prior commit). With the reset gone,
p-8 works correctly and is the simpler form.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: CoderCoco

app/packages/web/src/components/app-layout.component.tsx

@@ -128,7 +128,7 @@ export function AppLayout({ children }: { children: ReactNode }) {
         </header>
 
         {/* Page content */}
-        <main className="flex-1 overflow-auto px-8 py-8">
+        <main className="flex-1 overflow-auto p-8">
           {children}
         </main>
       </div>