[httpsphl]

What

The owner could not tell from the sidebar whether a bot had answered: it only went back to Ready. Now a bot that replied since the owner last looked at its chat is marked unread, as in a messaging app:

• The name is in bold.
• The preview and the time are highlighted.
• An accent dot sits at the end of the row.

The mark stays until the chat is opened.

• Daemon: Bot.lastReplyAt is the newest reply's time. The conversation line may already be a tool or another bot's message by then, so this comes from its own query, with a partial index (0013_reply_index.sql). The chat store's tests move to chat/tests.rs so chat.rs stays short.
• App:
  • The marks are kept in store/seen.ts. replyAt is filled from lastReplyAt and from each new reply item.
  • While the chat is open and the window is in sight, replies count as seen as they arrive.
  • With the sidebar hidden, its button shows a quieter dot that does not move.
  • The first start with this version counts older replies as seen (botloft.seenSince), so the update does not mark every bot at once.
• Spec: sections 11 (lastReplyAt) and 15.1 (sidebar) are updated.

Checks

• pnpm check: 270 tests pass. The new unread.test.tsx covers four cases:
  • a reply marks the bot, and a newer item after it does not hide the mark;
  • a reply in the open chat is seen;
  • a reply from before the app opened is marked;
  • replies from before the first start are not marked.
• Rust: cargo fmt and clippy -D warnings pass. The new store test passes, and bots.list returns lastReplyAt (tests/chat.rs, tests/rpc_crews_bots.rs).
• Preview: the rows of the bots that replied show the mark, and it clears when their chat is opened.

Still to see

• With real bots, check that the mark appears when a bot answers while another chat is open, and when it answers with the app closed.