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/schemas/bot-schema.ts

@@ -18,6 +18,13 @@ export const BotIdRequestSchema = z.object({
 
 export type BotIdRequest = z.infer<typeof BotIdRequestSchema>;
 
+export const SetBotComputerRequestSchema = z.object({
+    bot_id: z.coerce.number().int().positive("Pick a bot"),
+    computer_id: z.coerce.number().int().positive("Pick a computer"),
+});
+
+export type SetBotComputerRequest = z.infer<typeof SetBotComputerRequestSchema>;
+
 export const UploadBotAttachmentRequestSchema = z.object({
     /**
      * The file as a base64 data URL.