Add notes to practice hands

“Practice Hands” Notes / Comments panel:

Similarly to H2N and PT4, add a note panel for individual drill hands so users can write quick notes and tag hands for review. Ideally:

• Create/edit notes directly from the drill hand view and/or in the session results review

• Notes saved to the account and tied to the hand + node/spot (position, stack depth, format, etc.)

• Optional tags/labels automatically included (ask coach, review, etc.)

• A way to filter/search hands by notes/tags later, and a “Marked for review” list

Export option (CSV/PDF) would be a bonus for sharing with a coach.