feat: p2 batch 28-31 reminders lists comments bang stats

Calendar events support multiple reminder offsets with presets and per-user defaults.

Lists index adds inline task entry and list property editing.

Generic entity comments on list detail. New bangs.stats dashboard widget.

Closes Gitea #28, #29, #30, #31. Migrations 0022 and 0023.

src/components/default-event-reminders-setting.tsx

@@ -0,0 +1,34 @@
+"use client";
+
+import { useState, useTransition } from "react";
+import { ReminderPicker } from "@/components/reminder-picker";
+import { Button } from "@/components/ui/button";
+import { setDefaultEventReminderOffsets } from "@/app/settings/reminder-actions";
+
+export function DefaultEventRemindersSetting({ initialOffsets }: { initialOffsets: number[] }) {
+  const [saved, setSaved] = useState(initialOffsets);
+  const [offsets, setOffsets] = useState(initialOffsets);
+  const [isPending, startTransition] = useTransition();
+
+  const dirty =
+    offsets.length !== saved.length || offsets.some((value, index) => value !== saved[index]);
+
+  function handleSave() {
+    startTransition(async () => {
+      await setDefaultEventReminderOffsets(offsets);
+      setSaved(offsets);
+    });
+  }
+
+  return (
+    <div className="space-y-3">
+      <p className="muted text-[13px]">
+        Applied when you create a new calendar event. You can still customize reminders per event.
+      </p>
+      <ReminderPicker offsets={offsets} onChange={setOffsets} disabled={isPending} />
+      <Button type="button" size="sm" disabled={!dirty || isPending} onClick={handleSave}>
+        {isPending ? "Saving…" : "Save defaults"}
+      </Button>
+    </div>
+  );
+}