Add a feature where recent public channel messages can be echoed back to
newly joining users when they enter the chat room.
* Configure in settings.toml with EchoMessagesOnJoin. 0 = disable storage.
* Messages are stored in RAM and lost on a server reboot.
* A buffer of recent public messages per channel can be kept, e.g. for the
10 most recent messages.
* The settings can be reloaded with /reconfigure and the message buffers
will rebalance on the next message sent.
* When a new user logs in, a new "echo" message is sent that contains all
of the echoed messages on a "messages" list, in one WebSocket packet.
* Echoed messages are put above the ChatServer welcome messages.
* If a message is taken back, it's removed from the echo message buffer.
Other Changes
* Don't broadcast Presence messages within 30 seconds of the server boot, to
lessen a flood of messages when a lot of users were connected at reboot.
* Change the default "Join messages" setting on front-end to hide them in
public channels.
* For the admin buttons in ProfileModal, use the AlertModal instead of native
browser prompts.
* Add support for storing DM history between users in a SQLite3 database.
* Opt-in by editing your settings.toml to set DirectMessageHistory/Enabled=true
* Retention days (default 90) will flush old DMs on app startup.
* On the front-end, DM history is checked when a DM thread is opened.
* New API endpoint: /api/blocklist where your site can pre-deliver muted
username lists for users before they enter the chat.
* Image sharing in DMs is allowed if either party is an operator.
* Add support for JWT tokens to authenticate users from your external app.
* JWT backed users can have profile pictures, profile URLs, and operator
status (admin). Note that no operator features exist yet.
* Add WelcomeMessages to settings.toml for default ChatServer messages to
write to each public channel directed at a new user logging in.
* Markdown support for chat messages!
* Add configuration system and default public channels support
* Add support for multiple channels and DM threads with users,
with unread badge indicators. DMs rearrange themselves by
most recently updated on top.
* Responsive CSS to work well on mobile devices.
