* feat(quick-chat): eager-init agent on profile selection
Switch quick-chat backend from `IntentPrepare` to `IntentStart` so the
agent process boots immediately when the user picks a profile, instead
of waiting for the first prompt. The ACP `session/new` handshake fires
before the user types anything, so the slash menu, mode dropdown, and
model selector are populated up-front. Fixes the empty-slash-menu UX
in quick chat for ACP agents (OpenCode, Claude, Codex, etc.).
Frontend picker shows a per-card spinner + disables sibling cards
during boot. Rapid profile switches (and other picker-bypassing
actions like opening a new tab, switching tabs, or closing the modal)
supersede the in-flight start via a monotonic request id; the
resolved task is cleaned up via `deleteQuickChatTask` so we never
orphan an ephemeral task or its agent process.
Backend rollback uses a fresh background context so `DeleteTask`
runs even when the request context has already been cancelled by
the client.
`mock-agent` now emits `available_commands_update` from `NewSession`
and `LoadSession` (matching real OpenCode/Claude) so the eager-init
pipeline is exercised in e2e. Existing prompt-time emit kept as an
idempotent fallback.
* test+cleanup(quick-chat): unit tests for useAgentSelection; minor cleanups
- Add 5 unit tests for useAgentSelection covering happy path, rapid-pick
supersession, reset() during in-flight, and error toast vs silent-on-superseded.
Exercises the orphan-task cleanup that the eager-init flow depends on.
(claude bot review)
- Drop redundant isDisabled alias in AgentPickerView. (claude bot review)
- Drop unused ctx parameter from emitAvailableCommandsAfterDelay — it was
always called with context.Background() so the Done() branch was dead
code. (claude bot review)
- Re-format with prettier after the rebase.
* fix(quick-chat): use constants.TaskDeleteTimeout for rollback ctx
Match the other DeleteTask call sites in task_http_handlers.go (line 851)
instead of an ad-hoc 10s timeout. (claude bot review)
José Almeida