Video watch pages: the byline shows the streamer's or uploader's picture over the letter, as the channel page does since #89 (#91)

ddiff --git a/server/video/pages.js b/server/video/pages.js
iindex 0583f7e..8091569 100644
---- a/server/video/pages.js
++++ b/server/video/pages.js
@@@ -797,7 +797,7 @@ ${savedNotice(req)}${ownOnly ? notice('Private: only you (and OpenVibe staff) ca
  <div class="ovv-player-wrap"><video class="ovv-player" controls preload="metadata" playsinline src="${fileOf(vod) || ''}" data-ovv-video${nextAttr}${viewAttr}${hlsAttr}>${segs.length ? html`<track kind="captions" label="Transcript (AI)" src="/v/${id}/captions.vtt" default>` : ''}${mems.length ? html`<track kind="chapters" src="/v/${id}/chapters.vtt">` : ''}</video></div>
  <h1 class="ovv-title">${vod.title || 'Stream recording'}</h1>
  <div class="ovv-byline">
--${channelName ? html`<a class="ovv-avatar" href="${localChannel || liveChannel}" aria-hidden="true" tabindex="-1">${String(channelName).slice(0, 1).toUpperCase()}</a>` : ''}
++${channelName ? html`<a class="ovv-avatar" href="${localChannel || liveChannel}" aria-hidden="true" tabindex="-1">${String(channelName).slice(0, 1).toUpperCase()}${live.isUsername(String(vod.username || '')) ? html`<img src="${config.networkUrl}/avatar/${vod.username}" alt="" loading="lazy">` : ''}</a>` : ''}
  <div class="ovv-byline-text">${channelName ? (localChannel ? html`<a class="ovv-channel-name" href="${localChannel}">@${channelName}</a>` : html`<span class="ovv-channel-name">@${channelName}</span>`) : ''}
  ${metaParts.length ? html`<span class="ovv-meta">${metaParts.map((p, i) => (i === 0 ? p : [html` · `, p]))}</span>` : ''}</div>
  <div class="ovv-byline-actions">${saveForm}${channelName ? html`<a class="ovv-btn" href="${liveChannel}"><i class="fa-solid fa-tower-broadcast" aria-hidden="true"></i> Channel on OpenVibe.Live</a>` : ''}${threadUrl ? html`<a class="ovv-btn" href="${threadUrl}"><i class="fa-regular fa-comments" aria-hidden="true"></i> Discuss on OpenVibe.Community</a>` : ''}</div>
ddiff --git a/server/video/upload-routes.js b/server/video/upload-routes.js
iindex 9757959..ee39b30 100644
---- a/server/video/upload-routes.js
++++ b/server/video/upload-routes.js
@@@ -277,7 +277,7 @@ ${ready && vod ? html`<div class="ovv-player-wrap"><video class="ovv-player" con
                  : html`<p>The upload stopped before the end (${row.parts_received} of ${row.parts_expected} parts). Upload the file again from <a href="/upload">Upload</a>.</p>`}</div>`}
  <h1 class="ovv-title">${row.title}</h1>
  <div class="ovv-byline">
--${channel ? html`<a class="ovv-avatar" href="/@${channel}" aria-hidden="true" tabindex="-1">${channel.slice(0, 1).toUpperCase()}</a>` : ''}
++${channel ? html`<a class="ovv-avatar" href="/@${channel}" aria-hidden="true" tabindex="-1">${channel.slice(0, 1).toUpperCase()}${/^[A-Za-z0-9_]{1,32}$/.test(channel) ? html`<img src="${ctx.config.networkUrl}/avatar/${channel}" alt="" loading="lazy">` : ''}</a>` : ''}
  <div class="ovv-byline-text">${channel ? html`<a class="ovv-channel-name" href="/@${channel}">@${channel}</a>` : ''}
  ${metaParts.length ? html`<span class="ovv-meta">${metaParts.map((p, i) => (i === 0 ? p : [html` · `, p]))}</span>` : ''}</div>
  ${saveForm ? html`<div class="ovv-byline-actions">${saveForm}</div>` : ''}
ddiff --git a/test/video-pages.test.js b/test/video-pages.test.js
iindex ba41f62..9dd06c7 100644
---- a/test/video-pages.test.js
++++ b/test/video-pages.test.js
@@@ -249,6 +249,7 @@ function countOccurrences(haystack, needle) {
          assert.strictEqual(r.status, 200);
          assert.ok(r.text.includes('<video'), 'a video element');
          assert.ok(r.text.includes('src="https://openvibe.media/v/101"'), 'the playback url');
++        assert.match(r.text, /class="ovv-avatar"[^>]*>S<img src="[^"]*\/avatar\/streamer" alt="" loading="lazy">/, 'the streamer\'s picture over the letter');
          assert.ok(r.text.includes('preload="metadata"'));
          assert.ok(r.text.includes('playsinline'));
          assert.ok(r.text.includes('data-ovv-video'));