Pin each pinned container by its GROWTH corner (not its saved-point corner)
via a shared PositionPinnedContainer helper, with pos.point kept as the
screen reference plus a half-frame offset. The first frame's screen position
no longer depends on the container's frame count, so test mode (sized to
testCount) and live (sized to the visible count) place the frames identically
— with no migration and no jump for existing positions.

Also re-apply the saved position when leaving test mode: a test-mode drag
updates set.position, but the live container was only re-reading it on a
/reload, so it snapped back to its old spot. ExitTestMode now repositions
each live container from set.position on the way out.

CENTER never actually centred the pinned frames — they grew START-style and
only the anchor/label shifted. Remove it from the Frame Growth / Column Growth
dropdowns (Start / End only) and normalise existing CENTER values to START
(no visual change, since CENTER already rendered as START). The layout
plumbing is left in place for a proper centred mode later.

- Live-mover drag mirrors position to _realRaidDB only in raid (IsInRaid guard);
  party drags no longer overwrite the raid set's saved position.
- A user Lock during combat clears the combat-restore intent so handles don't
  re-appear after combat (SetMoversShown(false) cancels moversShownBeforeCombat/
  pendingMoversShown; LockAllForCombat re-arms it after).
- SetEnabled doesn't show live chrome while test mode is active (the preview owns
  the screen) and re-asserts Hide-Mover alpha + active-highlight on re-show.
- RemoveSet compacts _realRaidDB.pinnedFrames.sets too (raid, identity-guarded)
  so the index-based position mirror stays aligned after a remove.
- FullProfileRefresh pinned loops use MAX_SETS (sets 3-4 refresh on profile switch).
- Pinned snap-to-grid uses a point-snap (its coord is a point anchor, not a
  centred box) instead of the centre/edge model.

- RestampPinnedPresets restamps all MAX_SETS sets after a preset rename/delete
  (was sets 1-2 only), so sets 3-4 don't keep a stale/dead preset stamp.
- Exporting/importing the pinnedFrames category carries the Aura/Text Designer
  preset libraries, so a shared pinned set doesn't land on a missing preset.
- Trim the dead PINNED_DEFAULTS keys (incl. a contradictory keepOfflinePlayers
  default) to just {enabled}.

…ead locked writes

…ild)