The one-way lane flip: an override into no-room now carries its undo

Eric tapped "flat" on Flick 'em Up in a packed cube. The flip means
"stand this instead" — but the cube's standing lane is 1.55 inches and
the box is 2.8 thick, so the override landed it laneless. And laneless
meant no lane button: the override that caused the problem had no
control left to revoke it. A one-way door, sprung mid-curation.

Now an override that leaves its box without a lane renders as
"no room ✱ undo" — one tap clears the override and the packer chooses
again. The plain "no room" chip (no override, nothing to undo) stays a
chip. Verified live on the real B1: flip-trapped box showed the undo,
one tap returned it to the flat pile, override cleared from
locations.json.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016jXZFSTZQKzAC8fqpWSz9g

data/locations.json

@@ -109,7 +109,6 @@
     "opening_id": "library-kallax-c4"
   },
   "166109:253058": {
-    "acknowledged": true,
     "note": "",
     "opening_id": "library-kallax-b1"
   },

data/shelf_plan.csv

@@ -134,3 +134,4 @@ Alice is Missing,library-right-shelving-2-d1,
 Alice is Missing: Silent Falls,library-right-shelving-2-d1,
 Parsely,library-right-shelving-2-d1,
 Dark Cults,library-right-shelving-2-d1,
+Frosthaven,library-right-shelving-2-e1,yes