Save The Tree implementation and acceptance work in progress

Preserve production code, regression fixtures, audio assets and provenance, test infrastructure, and the original-completion plan and progress ledger. Final game and Windows acceptance remain pending; excluded local artifacts and native experiments are not part of this snapshot.

assets/audio/ui/error_008.ogg.import

@@ -0,0 +1,19 @@
+[remap]
+
+importer="oggvorbisstr"
+type="AudioStreamOggVorbis"
+uid="uid://cwdh8pkwvyuf2"
+path="res://.godot/imported/error_008.ogg-41fd046ecd9f266bdea4813897127346.oggvorbisstr"
+
+[deps]
+
+source_file="res://assets/audio/ui/error_008.ogg"
+dest_files=["res://.godot/imported/error_008.ogg-41fd046ecd9f266bdea4813897127346.oggvorbisstr"]
+
+[params]
+
+loop=false
+loop_offset=0
+bpm=0
+beat_count=0
+bar_beats=4