fix: Admin-Navigation - Redirect /admin → /admin/catalogs

Problem: Navigation-Link zeigte /admin, aber Route war /admin/catalogs
Folge: Klick auf 'Admin' führte zu 404 (Catch-all Redirect zu /)

Fix: Redirect-Route von /admin zu /admin/catalogs hinzugefügt

version: 0.3.3

backend/version.py

@@ -1,6 +1,6 @@
 # Shinkan Jinkendo Version Information
 
-APP_VERSION = "0.3.2"
+APP_VERSION = "0.3.3"
 BUILD_DATE = "2026-04-23"
 DB_SCHEMA_VERSION = "20260423"
 
@@ -22,6 +22,14 @@ MODULE_VERSIONS = {
 }
 
 CHANGELOG = [
+    {
+        "version": "0.3.3",
+        "date": "2026-04-23",
+        "changes": [
+            "Fix: Admin-Navigation - Redirect /admin → /admin/catalogs",
+            "Fix: Admin-Link funktioniert jetzt (vorher 404)"
+        ]
+    },
     {
         "version": "0.3.2",
         "date": "2026-04-23",

frontend/src/App.jsx

@@ -177,6 +177,10 @@ function AppRoutes() {
           </ProtectedRoute>
         }
       />
+      <Route
+        path="/admin"
+        element={<Navigate to="/admin/catalogs" replace />}
+      />
       <Route
         path="/admin/catalogs"
         element={

frontend/src/version.js

@@ -1,6 +1,6 @@
 // Shinkan Jinkendo Frontend Version
 
-export const APP_VERSION = "0.3.2"
+export const APP_VERSION = "0.3.3"
 export const BUILD_DATE = "2026-04-23"
 
 export const PAGE_VERSIONS = {