R6.3 done: round 3 fix, hard links join the recent list

An explicit open checks the session registry by file identity, so a
hard link to a shown file joins the list. Ticked after round 3.

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

apps/ely-mark/src/places.rs

@@ -17,7 +17,7 @@ impl Desk {
             return self.open_folder(path, cx);
         }
         // A shown file only takes focus; the list still learns.
-        let shown = self.tab_of(&path).is_some();
+        let shown = self.core.sessions.is_open(&path).unwrap_or(false);
         self.open_file(path.clone(), cx);
         if shown {
             self.remember(&path, cx);

apps/ely-mark/src/restore/tests.rs

@@ -472,19 +472,19 @@ mod window {
         assert!(desk.read_with(cx, |desk, _| desk.recent.is_empty()));
         let list = data.path().join("recent.json");
         assert_eq!(std::fs::read_to_string(&list).expect("the list"), "[]");
-        // Explicit opens still join it, the restored file too.
+        // Explicit opens still join it: the restored file, a link.
+        let alias = files.path().join("alias.md");
+        std::fs::hard_link(&a, &alias).expect("a hard link");
         open(&desk, &a, cx);
+        open(&desk, &alias, cx);
         open(&desk, &b, cx);
         assert_eq!(names(&desk, cx), ["a.md", "b.md"]);
         let real = |path: &std::path::Path| dunce::canonicalize(path).expect("real");
-        let (a, b) = (real(&a), real(&b));
-        assert_eq!(
-            desk.read_with(cx, |desk, _| desk.recent.clone()),
-            [b.clone(), a.clone()]
-        );
+        let want = [real(&b), real(&alias), real(&a)];
+        assert_eq!(desk.read_with(cx, |desk, _| desk.recent.clone()), want);
         let kept: Vec<std::path::PathBuf> =
             serde_json::from_str(&std::fs::read_to_string(&list).expect("the list"))
                 .expect("a list");
-        assert_eq!(kept, [b, a]);
+        assert_eq!(kept, want);
     }
 }