openvibe.chat settings: download your chat history (JSON or CSV)

ddiff --git a/server/web/pages.js b/server/web/pages.js
iindex 088de01..d2b5771 100644
---- a/server/web/pages.js
++++ b/server/web/pages.js
@@@ -267,7 +267,10 @@ ${box('tts_sounds', 'Play chat sounds', tts.sounds !== false)}
  ${volume('tts_sound_volume', 'Chat sound volume', tts.sound_volume)}
  <fieldset class="oc-fieldset"><legend>Read messages relayed from</legend>${TTS_SOURCES.map(([k, label]) => box(`tts_src_${k}`, label, src[k] !== false)).join('')}</fieldset>
  <p><button type="submit">Save</button></p>
--</form>`,
++</form>
++<h2>Your chat history</h2>
++<p>Download every message you have sent that is still visible, in Live chat and here.</p>
++<p><a class="oc-button" href="/api/chat/me/export" download>Download (JSON)</a> <a class="oc-button" href="/api/chat/me/export?format=csv" download>Download (CSV)</a></p>`,
          });
      });