refactor(stall_watch): HerdrSource needs the herdr name, no fallback to the original (Issue #71)

Refs #71

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/test_issue60_linux_fixes.py

@@ -96,7 +96,7 @@ def test_the_1x_capture_still_reads_empty():
 
 @pytest.mark.parametrize("name", HOME_SCREENS)
 def test_stall_watch_sees_the_2x_home_box_empty(name, monkeypatch):
-    src = stall_watch.HerdrSource("t", "opencode")
+    src = stall_watch.HerdrSource("t", "opencode", name="t")
     monkeypatch.setattr(src, "_herdr", lambda *args: _pane(name))
     assert src.input_empty() is True