initial feature/react-migration commit

dashboard-dash-backup/callbacks/settings_callbacks.py

@@ -0,0 +1,20 @@
+# dashboard/callbacks/settings_callbacks.py
+import dash
+from dash import Input, Output, State, dcc
+from flask import session
+from utils.db import execute_query, execute_non_query
+
+@dash.callback(
+    Output("settings-feedback", "children"),
+    Input("btn-save-settings", "n_clicks"),
+    State("input-default-volume", "value"),
+    prevent_initial_call=True
+)
+def save_settings(n_clicks, volume):
+    if "role" not in session:
+        return dcc.Location(href="/login")
+    if n_clicks and n_clicks > 0:
+        sql = "UPDATE global_settings SET value=%s WHERE key='default_volume'"
+        rc = execute_non_query(sql, (volume,))
+        return "Einstellungen gespeichert." if rc else "Speichern fehlgeschlagen."
+    return ""