fix(messages): the delivery indicator updates when a send completes (#306)

DeliveryStatus showed whatever mEvent.status was at the last timeline
re-render, and a local echo's status changes (SENDING → SENT → confirmed,
NOT_SENT → retried) only emit event-level events, so the last message in
a quiet room kept "Sending..." (or a stale "Failed to send. Click to
retry" after an outbox retry) indefinitely. It now re-renders on
MatrixEventEvent.Status / LocalEventIdReplaced.

Not browser-verified in this change (checks: tsc, unit tests, eslint).

Fixes #306

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017PCb59uY3UKqDqt7B6hzd5

src/app/features/room/message/Message.tsx

@@ -31,12 +31,13 @@ import React, {
   MouseEventHandler,
   ReactNode,
   useCallback,
+  useEffect,
   useRef,
   useState,
 } from 'react';
 import FocusTrap from 'focus-trap-react';
 import { useHover, useFocusWithin } from 'react-aria';
-import { MatrixEvent, Room, EventStatus } from 'matrix-js-sdk';
+import { MatrixEvent, MatrixEventEvent, Room, EventStatus } from 'matrix-js-sdk';
 import { Relations } from 'matrix-js-sdk/lib/models/relations';
 import classNames from 'classnames';
 import { useAtom, useAtomValue } from 'jotai';
@@ -114,6 +115,20 @@ function DeliveryStatus({
 }) {
   const mx = useMatrixClient();
   const offline = useAtomValue(sendOfflineAtom);
+  // [Gitea #306] A local echo's status changes (SENDING → SENT → confirmed,
+  // NOT_SENT → retried) don't re-render the timeline, so the last message in a
+  // quiet room kept "Sending..." (or a stale "Failed to send") indefinitely.
+  // Re-render on the event's own status updates.
+  const [, setStatusTick] = useState(0);
+  useEffect(() => {
+    const bump = () => setStatusTick((t) => t + 1);
+    mEvent.on(MatrixEventEvent.Status, bump);
+    mEvent.on(MatrixEventEvent.LocalEventIdReplaced, bump);
+    return () => {
+      mEvent.off(MatrixEventEvent.Status, bump);
+      mEvent.off(MatrixEventEvent.LocalEventIdReplaced, bump);
+    };
+  }, [mEvent]);
   const { status } = mEvent;
   if (status === null) return null; // confirmed by server — read receipts take over
   let iconSrc: IconSrc;