feat(notifications): inline reply from a browser notification (#203)

Message notifications shown through the service worker now carry a text-input
'Reply' action (Chrome desktop/Android). On notificationclick with
action==='reply' the SW sends the typed text itself — it already holds the
newest session's access token for authenticated media — as m.room.message
(threaded when the notification was for a thread), so it works with the tab in
the background or closed; a failed send shows a 'Reply not sent' notification
that opens the room. Not offered for encrypted rooms (the SW cannot encrypt).
The sender lives in swReply.ts so it is unit-tested; verified headless that
the SW notification carries actions + {roomId, threadId}.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PPmy3tPq869XDW4njjVaKA

src/sw.ts

@@ -1,6 +1,7 @@
 /// <reference lib="WebWorker" />
 
 import { precacheAndRoute, type PrecacheEntry } from 'workbox-precaching';
+import { sendNotificationReply } from './swReply';
 
 export type {};
 declare const self: ServiceWorkerGlobalScope & {
@@ -147,6 +148,32 @@ self.addEventListener('notificationclick', (event: NotificationEvent) => {
   const data = event.notification.data ?? {};
   const path = typeof data.path === 'string' ? data.path : undefined;
 
+  // [Gitea #203] Reply action: send it and stop — no need to raise the app.
+  if (event.action === 'reply' && typeof data.roomId === 'string') {
+    const text = (event as NotificationEvent & { reply?: string }).reply?.trim();
+    if (text) {
+      event.waitUntil(
+        sendNotificationReply(
+          Array.from(sessions.values()).pop(),
+          data.roomId,
+          data.threadId,
+          text,
+        ).then((ok) => {
+          if (!ok) {
+            // Let the user know it didn't go out, and keep their text reachable.
+            return self.registration.showNotification('Reply not sent', {
+              body: `Couldn't send "${text.slice(0, 60)}" — open the app to retry.`,
+              tag: `swreply-fail-${data.roomId}`,
+              data: { path },
+            });
+          }
+          return undefined;
+        }),
+      );
+      return;
+    }
+  }
+
   event.waitUntil(
     (async () => {
       const windowClients = (