[contursofran]

Fixes #759

Change

• promptHook prints the todo line only when the prompt holds the owner's own words. ownerWords removes <task-notification>…</task-notification> blocks, <system-reminder> tags and <hc from="…">…</hc> notes; if no text stays, the hook prints nothing (the flow text of a coordinator still goes out as before).
• No todo tool: Claude Code's UserPromptSubmit input gives only session_id, transcript_path, cwd, permission_mode, hook_event_name and prompt. It has no list of tools, so there is no reliable sign. That part is not changed.

Pre-check

1. Tests: TestPromptHook cases for a notification alone, a notification in a system reminder, two hc notes, blank text, and owner words beside a notification or note. With the old check put back, it failed on the notification case.
2. Plan: both issue lines covered (second one: no sign, reported here).
3. Contract: line text unchanged.
4. Up to date: branch is on the latest main.
5. Diff read: no leftovers.
6. Coverage: both acceptance lines.
7. Duties: the old <hc from= prefix check and the blank check are part of ownerWords.
8. Evidence: no change on screen.