`npm run test:client` (Vitest/esbuild) doesn't type-check, so several
tasks' incomplete cleanup of the old RunConsole-era code in
Workspace.tsx (SlashCommand/BUILTIN_SLASH_COMMANDS references, old
RunStatus values, a stray `mode` field, a wrong `prompt` vs
`initialPrompt` key) went unnoticed through every review until `tsc
--noEmit` was run directly. Also fixes a stale `RunStatusPayload.exitCode`
read in Tabby's brain.ts and dangling RunStreamPayload/RunInputAckPayload
references left in types.ts.
nntrivi2001
cb8800fa31