Fix: Revert page/layout logos to support correct light/dark switching and fix login hydration mismatch

src/app/login/page.tsx

@@ -42,6 +42,7 @@ export default function LoginPage() {
                   type="email" 
                   defaultValue="demo@pragativeer.com"
                   placeholder="student@example.com" 
+                  suppressHydrationWarning
                   className="w-full bg-background border border-border rounded-xl px-4 py-3 text-sm focus:outline-none focus:ring-2 focus:ring-[#00F0FF] focus:border-transparent transition-all"
                 />
               </div>
@@ -55,6 +56,7 @@ export default function LoginPage() {
                     type={showPassword ? "text" : "password"} 
                     defaultValue="pragativeer2026"
                     placeholder="••••••••" 
+                    suppressHydrationWarning
                     className="w-full bg-background border border-border rounded-xl px-4 py-3 text-sm focus:outline-none focus:ring-2 focus:ring-[#00F0FF] focus:border-transparent transition-all pr-10"
                   />
                   <button