feat: add authentication and user management features

- Implemented AuthButton component for Discord sign-in and sign-out functionality.
- Created CopyButton component for copying server IP addresses.
- Developed EventCard and GradeCard components for displaying events and grades.
- Added Footer and Navbar components for site navigation and information.
- Introduced PurchaseButton for handling grade purchases with Stripe integration.
- Created SectionHeader component for consistent section titles.
- Implemented session management with SessionProvider for NextAuth.
- Set up PostgreSQL database with Docker and Prisma for data management.
- Added admin guard functionality to restrict access to certain routes.
- Configured NextAuth with Discord provider for user authentication.
- Defined Prisma schema for user, admin, grade, event, and purchase models.
- Seeded database with initial grades and events data.
- Added SVG hero image for the landing page.
- Extended NextAuth types to include additional user properties.

lib/site.ts

@@ -0,0 +1,58 @@
+export const siteConfig = {
+  name: "BinouzUHC",
+  description:
+    "Serveur UHC competitif et immersif. PvP nerveux, events reguliers et communaute engagee.",
+  serverAddress: "play.binouzuhc.eu",
+  version: "1.8.X",
+  discordInviteUrl: "https://discord.gg/binouz",
+  shopDisclaimer:
+    "Paiement Stripe a venir. Les achats sont simules pour l'instant.",
+} as const;
+
+export const fallbackGrades = [
+  {
+    id: "starter",
+    name: "Eclaireur",
+    price: 9,
+    description:
+      "Acces prioritaire, prefix colore, particules discretes et slots reserves.",
+  },
+  {
+    id: "elite",
+    name: "Gladiateur",
+    price: 19,
+    description:
+      "Kit cosmetique PvP, tags exclusifs, bonus d'events et loot personnalise.",
+  },
+  {
+    id: "legend",
+    name: "Titan",
+    price: 39,
+    description:
+      "Rang ultime, aura lumineuse, salons prives et avantages boutique VIP.",
+  },
+];
+
+export const fallbackEvents = [
+  {
+    id: "uhc-arena",
+    title: "UHC Arena - Duel Night",
+    description:
+      "Tournoi 1v1 avec bracket rapide. Score bonus pour les eliminations propres.",
+    eventDate: new Date("2026-05-18T19:00:00Z"),
+  },
+  {
+    id: "rush",
+    title: "Rush 2v2 - Full PvP",
+    description:
+      "Arches, potions, clutchs. Inscription par equipe sur Discord.",
+    eventDate: new Date("2026-05-25T19:00:00Z"),
+  },
+  {
+    id: "uhc-royale",
+    title: "UHC Royale",
+    description:
+      "Format 50 joueurs, shrink progressif, recompenses exclusives.",
+    eventDate: new Date("2026-06-01T19:00:00Z"),
+  },
+];