feat(communication): add chat reactions emojis and images

frontend/tests/chat-collaboration.test.cjs

@@ -356,3 +356,24 @@ test('returning to chat immediately reflects a disabled or re-enabled project wi
   await settle()
   assert.equal(ui.run('groupedRooms.value.find(group => group.label === "Projekte").rooms[0].key'), 'project_1')
 })
+
+
+test('native image-only sends retain the draft after an error and clear it after success', async t => {
+  let fail = true
+  const ui = setup(fixture((url, options) => {
+    if (url.endsWith('/messages') && options?.method === 'POST') {
+      if (fail) throw { status: 503, data: { message: 'Offline' } }
+      return { id: 2, body: '', image: { name: 'Bild', width: 80, height: 40 }, own: true }
+    }
+  }))
+  t.after(ui.close)
+  await ui.run('initialize()')
+  ui.run('draftImage.value = { dataUrl: "data:image/webp;base64,AAAA", name: "Bild" }')
+  await ui.run('sendMessage()')
+  assert.equal(ui.run('draftImage.value.name'), 'Bild')
+  fail = false
+  await ui.run('sendMessage()')
+  assert.equal(ui.run('messages.value.at(-1).image.name'), 'Bild')
+  assert.equal(ui.run('draftImage.value'), null)
+  assert.ok(ui.calls.some(c => c.options?.body?.image?.name === 'Bild'))
+})