feat(assistant): found places open the place form, notes kept on its own, city walk stops checked off

- Found places: the strip shows only when the answer names one of them, the
  named ones first. A click on a card, or "Add to trip", opens the planner's
  place form filled in with the place on the day in focus, its Google details
  (photos, hours, description) loading beside it; "+ Day" and the day grid
  are gone.
- Trip notes: remember_for_trip runs at once without a card. The assistant
  keeps lasting facts the user mentions (who travels, needs, likes, budget,
  pace) on its own and offers the unsure ones as a follow-up; the chat shows
  "Noted for this trip: ..." with the notes a tap away, and reads them again
  so the dialog never saves over the new note.
- City walks: set_city_walk_visit checks a station off on its day (visited,
  skipped, or the mark taken back), with day_edit as in the day plan, a
  change card naming the station and its walk, and an undo that restores the
  status before while the station is as the change left it.
- Card heads are a step smaller (32px tile, smaller title and count), and the
  dot beside "Working on it" in the header is gone.

shared/scripts/i18n-parity.mjs

@@ -86,7 +86,6 @@ function checkPluralForms(locale, keys, groups) {
  * ungrouped count string fails the check, so the list cannot go stale.
  */
 export const NOT_PLURAL = [
-  { key: 'assistant.place.addToShort', because: 'the number of the day a found place would go on ("+ Day 3")' },
   { key: 'assistant.card.tour.days', because: 'the numbers of the days a tour lies on ("Days 2, 4")' },
   { key: 'collab.polls.optionPlaceholder', because: 'the position of a poll option ("Option 3")' },
   { key: 'collections.importOnDay', because: 'the number of the day a place is planned on' },