UI and snapshot verification

Issue #25, verification run on 2026-10-12 against loop/issue-25 at 2393e75. Testing-plan rows: T5, T6.

TUI

uv run pytest tests/ui

9 snapshots passed.
27 passed in 34.01s
rc=0 secs=37

These are the SVG snapshots of the new states, from the committed snapshot tests:

• input-required-with-sub-state:
• slash-completion-and-hint:
• sub-task-row:
• sub-task-open:
• completed-state:

Web

cd renderers/web && bun run test:visual (Playwright, system Chromium via TINY_HARNESS_CHROMIUM)

  12 passed (23.4s)
rc=0 secs=36

• controls-light:
• controls-dark:
• controls-phone:
• listbox:
• sub-task-created:
• sub-task-open:
• completed-light:
• completed-dark:
• completed-phone:

The flow goes: reply → / listbox → /sub-task → open it → Complete the sub-task → ← Parent → Complete.

The screens match the locked prototypes in docs/specs/issue-25/design/, except where design.md changed during implementation:

• Web sub-task rows show the id and the agent, not "state · goal": showing state and goal would cost an extra request per sub-task.
• In the TUI, the reply is drawn before its state line.