T-310: numpad digits select prompt-card options

The prompt card's number-key shortcuts matched only digit1..digit9
(the number row); numpad 1-9 fell through to ignored. Add a
parallel _numpadKeys list and check it in _onKey so the keypad
maps to the same 1-9 selection for Allow/Deny and question
options. numpadEnter was already handled. The hasPrimaryFocus
guard still lets digits type into a focused note field.

Adds four widget tests (numpad Allow/Deny, question option,
focused-note swallow). Closes T-310 (under UI epic T-276).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

CHANGELOG.md

@@ -256,6 +256,11 @@ heading, and (b) bumping `pubspec.yaml` `version:` in the same commit.
 
 ### Fixed
 
+- **Numpad digits now pick permission/question options too.** The prompt card's
+  number-key shortcuts only matched the top number row; numpad `1`-`9` now map to
+  the same 1-9 selection, so the keypad works for Allow/Deny and question options.
+  The note-field guard still lets digits type normally when a note is focused.
+  (T-310)
 - **The composer no longer jams against the window bottom when the status bar
   is hidden.** With the bar gone, the bottom-most pane content used to run flush
   into the window's resize-drag edge; the layout now reserves that edge so the