Fixes for M-02 to M-14, G-01 to G-14, K-02 to K-04, X-04 to X-14, not yet reviewed

Committed before review so Windows and WSL builds can start.
Each fix was tested and mutation-checked here; the codex review
of each item is still to come, so tasks/BUGS.md stays unticked.

M-02 is mid-review: round 1 findings are fixed (apps/ely-mark/src/tally.rs).
K-01 stays deferred. The ElyMark window test mark-outside.sh failed
once at its crash-recovery step in the last run; not yet looked into.

apps/ely-mark/src/engine.rs

@@ -132,7 +132,7 @@ impl Engine for Mark {
     }
 
     fn edited(view: &MarkView) -> u64 {
-        view.changed
+        view.changed()
     }
 
     fn edit_pending(view: &MarkView) -> bool {