Add computer switching, crew reporting, job steps and markdown chat

- Bots have a current computer (bots.computer_id), switched from the chat
  header beside the model button or by clicking a computer the bot names
  ([computer:ID]); tasks run on it by default
- search_computers runs one read-only command on all of a bot's computers;
  chat replies know their computers (compose-computers-note)
- The coordinator can use every computer and grants or revokes crew access
  with assign_computer
- Delegated jobs record requested_by_bot_id; the worker's result or failure
  is reported back in the coordinator's conversation
- bots_queue_updates records each model turn of a job, pushed live and shown
  in the working-on panel
- Live relay: every process pushes new messages, job steps and bot changes
  from the database to its own sockets, so work done elsewhere shows live
- Bot messages render as markdown (react-markdown + remark-gfm, no raw HTML)
  with twui components; rail previews are plain text
- Fix header button overflow in the model and computer selects
- Bump @moduletrace/twui to 0.1.2

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/data/app-data.ts

@@ -108,6 +108,22 @@ export const AppData = {
      * One MCP tool call gives up after this long without progress.
      */
     McpToolTimeoutMs: 5 * 60 * 1000,
+    /**
+     * `search_computers`: how long the command may run on each computer,
+     * and how much of each computer's output the bot reads.
+     */
+    ComputerSearchTimeoutMs: 30 * 1000,
+    ComputerSearchMaxOutputChars: 4000,
+    /**
+     * How many of a job's latest steps (`bots_queue_updates`) the
+     * working-on panel shows.
+     */
+    BotJobUpdatesShown: 12,
+    /**
+     * How often each server process reads new bot messages, job steps and
+     * bot changes from the database for its own sockets (`liveRelay`).
+     */
+    LiveRelayPollMs: 1500,
     /**
      * How much of the conversation a bot sees when it replies.
      */