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/side_refs.rs

@@ -28,7 +28,7 @@ fn branch(found: &Ref) -> Branch {
         ahead,
         behind,
         subject: found.subject.clone().into(),
-        when: when(found.at),
+        when: found.at.map_or_else(|| "—".into(), when),
     }
 }
 
@@ -37,7 +37,7 @@ fn tag(found: &Ref) -> GitTag {
         name: found.name.clone().into(),
         message: found.message.clone().map(Into::into),
         commit: found.commit.clone().into(),
-        when: when(found.at),
+        when: found.at.map_or_else(|| "—".into(), when),
     }
 }
 
@@ -59,7 +59,7 @@ pub fn branches(tree: &Entity<Tree>, cx: &mut Context<Changes>) -> AnyElement {
         }
         Some(Ok(refs)) => refs,
     };
-    let picked = read.picked_ref.clone();
+    let picked = opened.picked_ref.clone();
     // A name shows picked only in its own kind's list.
     let picked_in = move |kind: Kind| {
         picked
@@ -72,7 +72,10 @@ pub fn branches(tree: &Entity<Tree>, cx: &mut Context<Changes>) -> AnyElement {
         move |name: &gpui::SharedString, _: &mut gpui::Window, cx: &mut gpui::App| {
             let name = name.to_string();
             this.update(cx, |tree, cx| {
-                tree.picked_ref = Some((kind, name));
+                tree.look = None;
+                if let Some(opened) = tree.active.and_then(|id| tree.opened_mut(id)) {
+                    opened.picked_ref = Some((kind, name));
+                }
                 cx.notify();
             })
             .ok();