ElyMark: dropped and pasted pictures copy into assets and link at the caret (C14.10)

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

apps/ely-mark/src/main.rs

@@ -1,6 +1,7 @@
 // Release builds open no console on Windows.
 #![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
 
+mod attach;
 mod autosave;
 mod compare;
 mod desk;