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Chat+ link previews: a link in a chat shows its page's title, text and picture, YouTube playable in place

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X's web chat shows a link as a bare card. An X tab on a chat page may now ask native code
(link_preview, x-capture only, chat pages only) for one link's preview. Native code fetches it:
https and public hosts only (addresses checked and pinned), never X's hosts, no cookies or
referrer, redirects re-checked, page head <= 512 KB, images <= 1.5 MB by magic bytes as data:,
30 fetches a minute, memory-only cache. Only the link leaves the page. On by default (owner,
2026-10-10).
This commit is contained in:
CRTkafa 2026-10-10 21:47:31 +08:00
parent 89c9bfc75f
commit c03f1a989b
21 changed files with 1455 additions and 519 deletions
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8
apps/desktop/tests/area-chat.test.ts
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@ -61,11 +61,11 @@ const pace = (chat: FakeChat) => ({ sleep: (ms: number) => new Promise<void>(res
const star = (row: El) => row.querySelector('.bt-chat-star')!;
const group = (chat: FakeChat) => chat.conversations.get(GROUP)!.history;
test('Chat+: five features, each its own flag, all off by default, all allowed on X\'s chat pages', () => {
assert.deepEqual(FEATURES.map(feature => feature.id), ['chat.bookmarks', 'chat.searchLoaded', 'chat.pins', 'chat.personFilter', 'chat.keywords']);
test('Chat+: six features, each its own flag, off by default but link previews (owner, 2026-10-10), all allowed on X\'s chat pages', () => {
assert.deepEqual(FEATURES.map(feature => feature.id), ['chat.bookmarks', 'chat.searchLoaded', 'chat.pins', 'chat.personFilter', 'chat.linkPreviews', 'chat.keywords']);
assert.deepEqual(MODULES.map(module => module.id).sort(), FEATURES.map(feature => feature.id).sort());
for (const feature of FEATURES) {
assert.equal(feature.default, false, feature.id);
assert.equal(feature.default, feature.id === 'chat.linkPreviews', feature.id);
assert.equal(feature.heavy, true, `${feature.id} runs on the heavy chat pages`);
assert.ok(feature.permissions && !feature.permissions.includes('network'), `${feature.id}: no network`);
}
@ -175,7 +175,7 @@ test('starred messages: stored in full, valid ones only, each once; the list fil
});
test('Starred messages: a star on every rendered row; a click stores exactly that message, in full; off leaves nothing', () => {
const { env, chat, stored } = page(`/i/chat/${GROUP}`, { 'chat.bookmarks': true });
const { env, chat, stored } = page(`/i/chat/${GROUP}`, { 'chat.bookmarks': true, 'chat.linkPreviews': false });
assert.deepEqual(env.registry.active(), ['chat.bookmarks']);
const all = group(chat);
const rows = chat.rendered();