diff --git a/dbal/cpp/src/validation/package_validation.hpp b/dbal/cpp/src/validation/package_validation.hpp
new file mode 100644
index 000000000..34567cc15
--- /dev/null
+++ b/dbal/cpp/src/validation/package_validation.hpp
@@ -0,0 +1,39 @@
+/**
+ * @file package_validation.hpp
+ * @brief Validation functions for Package entity
+ */
+#ifndef DBAL_PACKAGE_VALIDATION_HPP
+#define DBAL_PACKAGE_VALIDATION_HPP
+
+#include <string>
+#include <regex>
+
+namespace dbal {
+namespace validation {
+
+/**
+ * Validate package name (1-255 characters)
+ */
+inline bool isValidPackageName(const std::string& name) {
+    return !name.empty() && name.length() <= 255;
+}
+
+/**
+ * Validate semver version format (X.Y.Z)
+ */
+inline bool isValidSemver(const std::string& version) {
+    static const std::regex semver_pattern(R"(^(0|[1-9]\d*)\.(0|[1-9]\d*)\.(0|[1-9]\d*)$)");
+    return std::regex_match(version, semver_pattern);
+}
+
+/**
+ * Generate package key from name and version
+ */
+inline std::string packageKey(const std::string& name, const std::string& version) {
+    return name + "@" + version;
+}
+
+} // namespace validation
+} // namespace dbal
+
+#endif
diff --git a/frontends/nextjs/src/components/ui/molecules/tabs/TabsList.tsx b/frontends/nextjs/src/components/ui/molecules/tabs/TabsList.tsx
index 408c16a3f..cf29cfb13 100644
--- a/frontends/nextjs/src/components/ui/molecules/tabs/TabsList.tsx
+++ b/frontends/nextjs/src/components/ui/molecules/tabs/TabsList.tsx
@@ -5,7 +5,7 @@ import { Box } from '@mui/material'
 import type { BoxProps } from '@mui/material'
 import { TabsContext } from './tabs-context'
 
-export interface TabsListProps extends BoxProps {}
+export type TabsListProps = BoxProps
 
 const TabsList = forwardRef<HTMLDivElement, TabsListProps>(
   ({ children, sx, ...props }, ref) => {
diff --git a/frontends/nextjs/src/hooks/auth/auth-store.ts b/frontends/nextjs/src/hooks/auth/auth-store.ts
index 9a5fefdbc..8fd89d933 100644
--- a/frontends/nextjs/src/hooks/auth/auth-store.ts
+++ b/frontends/nextjs/src/hooks/auth/auth-store.ts
@@ -2,6 +2,7 @@ import type { User } from '@/lib/level-types'
 import { fetchSession } from '@/lib/auth/api/fetch-session'
 import { login as loginRequest } from '@/lib/auth/api/login'
 import { logout as logoutRequest } from '@/lib/auth/api/logout'
+import { register as registerRequest } from '@/lib/auth/api/register'
 import type { AuthState, AuthUser } from './auth-types'
 
 const roleLevels: Record<string, number> = {
@@ -64,6 +65,28 @@ export class AuthStore {
     }
   }
 
+  async register(username: string, email: string, password: string): Promise<void> {
+    this.setState({
+      ...this.state,
+      isLoading: true,
+    })
+
+    try {
+      const user = await registerRequest(username, email, password)
+      this.setState({
+        user: this.mapUserToAuthUser(user),
+        isAuthenticated: true,
+        isLoading: false,
+      })
+    } catch (error) {
+      this.setState({
+        ...this.state,
+        isLoading: false,
+      })
+      throw error
+    }
+  }
+
   async logout(): Promise<void> {
     this.setState({
       ...this.state,
diff --git a/frontends/nextjs/src/hooks/auth/auth-types.ts b/frontends/nextjs/src/hooks/auth/auth-types.ts
index 4de6080b2..3a17fd321 100644
--- a/frontends/nextjs/src/hooks/auth/auth-types.ts
+++ b/frontends/nextjs/src/hooks/auth/auth-types.ts
@@ -21,6 +21,7 @@ export interface AuthState {
 
 export interface UseAuthReturn extends AuthState {
   login: (identifier: string, password: string) => Promise<void>
+  register: (username: string, email: string, password: string) => Promise<void>
   logout: () => Promise<void>
   refresh: () => Promise<void>
 }