Fix: Set isLoggedIn state and handle redirects

This commit addresses several issues related to the login flow:

- Corrects the `isLoggedIn` variable to use `setIsLoggedIn` in `App.jsx`.
- Passes `onLogin` and `isLoggedIn` props to `CampfireAppBar`.
- Enables logout functionality in `AppBar.jsx`.
- Modifies `AppRoutes.jsx` to conditionally render `CampfireAppBar`.
- Converts pages to use `React.forwardRef` for page transitions.
- Fixes the `useState` import in `App.jsx`.
- Moves `NotificationGroup` to the top of the form in `LoginComponent.jsx` to prevent overlap.
- Corrects the logo path in `LoginPage.jsx`.
- Improves input accessibility with a border in `LoginComponent.jsx`.

src/assets/css/App.css

@@ -0,0 +1,48 @@
+#root {
+  max-width: 1280px;
+  margin: 0 auto;
+  padding: 2rem;
+  text-align: center;
+  display: flex;
+  flex-direction: column;
+  justify-content: center;
+  align-items: center;
+  min-height: 100vh;
+  caret-color: transparent;
+}
+
+.logo {
+  height: 6em;
+  padding: 1.5em;
+  will-change: filter;
+  transition: filter 300ms;
+}
+.logo:hover {
+  filter: drop-shadow(0 0 2em #646cffaa);
+}
+.logo.react:hover {
+  filter: drop-shadow(0 0 2em #61dafbaa);
+}
+
+@keyframes logo-spin {
+  from {
+    transform: rotate(0deg);
+  }
+  to {
+    transform: rotate(360deg);
+  }
+}
+
+@media (prefers-reduced-motion: no-preference) {
+  a:nth-of-type(2) .logo {
+    animation: logo-spin infinite 20s linear;
+  }
+}
+
+.card {
+  padding: 2em;
+}
+
+.read-the-docs {
+  color: #888;
+}