CHORE(merge): merge from develop

- Initial setup and all features from develop branch
- Includes: auth, deploy, docker, style fixes
- K3S deployment configuration

nextjs/types/next-auth.d.ts

@@ -0,0 +1,31 @@
+// eslint-disable-next-line @typescript-eslint/no-unused-vars
+import { DefaultSession } from "next-auth";
+
+declare module "next-auth" {
+  interface Session {
+    user: {
+      id: string;
+      userId: string;
+      name: string;
+      email?: string | null;
+      emailVerified?: Date | null;
+    };
+  }
+
+  interface User {
+    id: string;
+    userId: string;
+    name: string;
+    email?: string | null;
+    emailVerified?: Date | null;
+  }
+}
+
+declare module "next-auth/jwt" {
+  interface JWT {
+    id: string;
+    userId: string;
+    name: string;
+  }
+}
+