docs(beszel): update system stats widget documentation and add time-period config

Update docs with new widget options and add client-side time-period
configuration for future live streaming support.

apps/docs/docs/widgets/beszel-system-stats/index.ts

@@ -10,10 +10,10 @@ export const beszelSystemStatsWidget: WidgetDefinition = {
     items: [
       {
         name: "Time period",
-        description: "The time range for chart data",
+        description: "The time range for chart data. '1 Minute' enables live streaming via PocketBase SSE (requires Beszel agent >= 0.13.0)",
         values: {
           type: "select",
-          options: ["1 Hour", "12 Hours", "24 Hours", "1 Week", "30 Days"],
+          options: ["1 Minute", "1 Hour", "12 Hours", "24 Hours", "1 Week", "30 Days"],
         },
         defaultValue: "1 Hour",
       },