small: `?` on any list page opens one overlay listing that page's keys, read from the same table the keys use #11437

One sentence: the keyboard help can never drift from the keys.

Done looks like:

• [ ] ? toggles an overlay of the keys the current page binds (from the key table in src/web/script_keys.ts / palette), esc closes it and returns focus.
• [ ] Ignored while typing in a field; no JavaScript added for pages with no keys.
• [ ] Test fails without it: every bound key appears in the overlay text.

Files expected: src/web/script_keys.ts, src/web/palette.ts, test/. Risks: #11092 binds /; keep to ?. Suggested brief: scout.

Done on main already, waiting for you to close it: f61ae4ef00423aade24e39b0add463b0fc17117d 0b78a28475bcf1563439cedde6ee00143b22eae8 6238a28d55c0fd6c7db28942eb95d6ea807dec17

Closed: already done on main in f61ae4e, 0b78a28, 6238a28. Closed by the crew's live triage; reopen it to undo, and it stays open.