docs(settings): Update README + Copilot instructions; bump Program Info to 2025.1.0-alpha.11

README: Add System Settings API endpoints; describe new tabbed Settings layout with role gating; add Vite dev proxy tip to use relative /api paths.
Copilot instructions: Note SystemSetting key–value store in data model; document system_settings.py (CRUD + supplement-table convenience endpoint); reference apiSystemSettings.ts; note defaults seeding via init_defaults.py.
Program Info: Bump version to 2025.1.0-alpha.11; changelog explicitly tied to the Settings page (Events tab: supplement-table URL moved; Academic Calendar: set active period; proxy note); README docs mention.
No functional changes to API or UI code in this commit; documentation and program info only.

server/init_defaults.py

@@ -42,3 +42,25 @@ with engine.connect() as conn:
             print(f"✅ Superadmin-Benutzer '{admin_user}' angelegt.")
         else:
             print(f"ℹ️  Superadmin-Benutzer '{admin_user}' existiert bereits.")
+
+        # Default System Settings anlegen
+        default_settings = [
+            ('supplement_table_url', '', 'URL für Vertretungsplan (Stundenplan-Änderungstabelle)'),
+            ('supplement_table_enabled', 'false', 'Ob Vertretungsplan aktiviert ist'),
+        ]
+    
+        for key, value, description in default_settings:
+            result = conn.execute(
+                text("SELECT COUNT(*) FROM system_settings WHERE `key`=:key"),
+                {"key": key}
+            )
+            if result.scalar() == 0:
+                conn.execute(
+                    text("INSERT INTO system_settings (`key`, value, description) VALUES (:key, :value, :description)"),
+                    {"key": key, "value": value, "description": description}
+                )
+                print(f"✅ System-Einstellung '{key}' angelegt.")
+            else:
+                print(f"ℹ️  System-Einstellung '{key}' existiert bereits.")
+
+    print("✅ Initialisierung abgeschlossen.")