Matches GitHub and cgitWeb, which display committer date. With jj,
author date stays fixed at original authorship while committer date
updates on every rewrite, so %ar diverged visibly from what those
tools show.

Assisted-by: Claude Sonnet 4.6 via Claude Code

diff --git a/quire-server/src/quire/web/handlers/git.rs b/quire-server/src/quire/web/handlers/git.rs
index f62c261..c105ffe 100644
--- a/quire-server/src/quire/web/handlers/git.rs
+++ b/quire-server/src/quire/web/handlers/git.rs
@@ -47,8 +47,8 @@ impl<'a> RepoView<'a> {
         let bookmark = self
             .run(&["symbolic-ref", "--short", "HEAD"])
             .unwrap_or_else(|| "main".to_string());
-        // %H = full sha, %s = subject, %ar = relative age
-        let log = self.run(&["log", "-1", "--format=%H%n%s%n%ar"])?;
+        // %H = full sha, %s = subject, %cr = committer date relative
+        let log = self.run(&["log", "-1", "--format=%H%n%s%n%cr"])?;
         let mut lines = log.lines();
         let sha = lines.next()?.to_string();
         let description = lines.next().unwrap_or("").to_string();
@@ -116,7 +116,7 @@ impl<'a> RepoView<'a> {
 
     pub(super) fn recent_changes(&self) -> Vec<ChangeRow> {
         let out = self
-            .run(&["log", "-12", "--format=%H|%s|%ar"])
+            .run(&["log", "-12", "--format=%H|%s|%cr"])
             .unwrap_or_default();
 
         out.lines()
diff --git a/quire-server/src/quire/web/handlers/tree.rs b/quire-server/src/quire/web/handlers/tree.rs
index 4175463..1b9d875 100644
--- a/quire-server/src/quire/web/handlers/tree.rs
+++ b/quire-server/src/quire/web/handlers/tree.rs
@@ -49,7 +49,7 @@ async fn tree_at_path(quire: Quire, repo: String, path: String) -> Response {
         let mut c = vec![Crumb::with_href("tree", format!("/{}/tree", repo_display))];
         if !path.is_empty() {
             c.push(Crumb::new(
-                path.split('/').last().unwrap_or(&path).to_string(),
+                path.split('/').next_back().unwrap_or(&path).to_string(),
             ));
         }
         c
@@ -135,7 +135,7 @@ fn read_tree_data(reader: &RepoView<'_>, path: &str) -> Option<TreeData> {
         } else {
             format!("{}/{}", path, name)
         };
-        let commit_info = reader.run(&["log", "-1", "--format=%s|%ar", "HEAD", "--", &entry_path]);
+        let commit_info = reader.run(&["log", "-1", "--format=%s|%cr", "HEAD", "--", &entry_path]);
         let (last_msg, age) = commit_info
             .and_then(|s| {
                 let mut it = s.splitn(2, '|');