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-tree/src/moves.rs

@@ -66,6 +66,9 @@ impl Tree {
         let task = cx.background_spawn(async move { ops::doing(&git, &root, &dir) });
         cx.spawn(async move |this, cx| {
             let read = task.await.map_err(|error| error.to_string());
+            if let Err(error) = &read {
+                log::error!("tree: what Git is doing did not read: {error}");
+            }
             this.update(cx, |tree, cx| {
                 if let Some(opened) = tree
                     .opened_mut(id)