Avatar images are not shipped (the author's were personal). Nothing breaks:
the UI automatically falls back to colored letter-block avatars.

To add your own, drop PNGs in this directory named to match the `avatar:`
field of each bot in ~/.local/share/local-chat/config.yaml — or just use the
Bot Manager in the app (click an avatar to upload; it keeps a full-resolution
original as <id>-full.png and crops a square face as <id>-face.png).
