herdr web ui v0.3.5

Added

• Web addresses in chat messages are links: a bare https://… URL or one in <…> opens in a
  new tab, as a [text](url) link already did. Punctuation that ends the sentence stays out of
  the link, and so does text written straight after it (e.g. Korean without a space).
• The chat composer attaches any file, not only PNG, JPEG, GIF and WebP images. An icon, a PDF or
  a log is stored beside the pane under its own name and mentioned by path, as images are; SVGs
  get a thumbnail too. Other files used to be dropped without a word.

Fixed

• Resizing the window no longer lags on a long session. Every frame of the drag resized the pane,
  and each resize made herdr reflow it and the program in it (Claude Code) repaint its whole
  conversation; the terminal now resizes once the drag rests.
• The app does much less work while it sits open. The terminal under the chat view no longer
  draws every output frame, an unchanged chat is no longer re-rendered on every status update,
  and a hidden tab or a phone app in the background stops polling until it is back.
• A chat open on a long session no longer stalls the server every poll while the agent works. The
  server re-read and re-parsed up to 16 MB of the transcript every 2 s; it now reads only what was
  appended and re-parses only the last turn.
• Live status, pane-ended and session-changed updates resume after herdr restarts. One failed
  reconnect used to stop them until the web server itself restarted.
• Long code blocks in a chat answer no longer look cut off. A block was capped at about six lines
  with the rest behind an inner scroll that a phone does not show, so a long answer seemed to stop
  halfway. Blocks now show whole; one longer than 30 lines opens at its first 20 with a
  Show all N lines row below it.