List lifecycle polish and cycle batches, from live walkthrough feedback

Generating a call list is non-destructive by intent: the button reads
Regenerate when an unused list exists and replaces it freely, with a
confirmation only when the day already has recorded outcomes (which
are always kept). The print view shows resolved calls' outcomes,
offers generate/regenerate in place, and the home page links to the
existing list. The day editor now supports adding calls after the
fact (any roster student, with status/assessment/note), completing
full editability: add, edit, delete.

Cycle mode is now a true rolling rotation driven by non-skipped call
counts: batches of n take the next students of the current pass,
remainder batches come up short rather than wrapping, a new pass
starts when everyone has been called, and the cycle continues across
lists and class days. Live mode uses the same rule.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

tests/test_instructor_ui.py

@@ -63,8 +63,16 @@ def test_generate_and_print(instructor):
     assert page.count("<tr>") == 13  # header + 12 rows
 
 
-def test_regenerate_replaces_pending(instructor):
+def test_regenerate_replaces_pending_and_labels_change(instructor):
+    page = instructor.get("/instructor/").get_data(as_text=True)
+    assert "Generate list for" in page
+
     instructor.post(f"/instructor/day/{TODAY}/generate", data={"n": "12"})
+    page = instructor.get("/instructor/").get_data(as_text=True)
+    assert "View today's list" in page
+    assert "Regenerate list" in page
+
+    # Regenerating replaces the unused list outright.
     resp = instructor.post(
         f"/instructor/day/{TODAY}/generate",
         data={"n": "5"},
@@ -72,6 +80,47 @@ def test_regenerate_replaces_pending(instructor):
     )
     assert resp.get_data(as_text=True).count("<tr>") == 6
 
+    # No recorded outcomes yet: no confirmation dialog wired up.
+    page = instructor.get(f"/instructor/day/{TODAY}/print").get_data(as_text=True)
+    assert "onsubmit" not in page
+
+    # Record one outcome; the regenerate form now carries a warning.
+    edit = instructor.get(f"/instructor/day/{TODAY}").get_data(as_text=True)
+    call_id = re.findall(r'name="status-(\d+)"', edit)[0]
+    instructor.post(
+        f"/instructor/day/{TODAY}",
+        data={f"status-{call_id}": "answered"},
+    )
+    page = instructor.get(f"/instructor/day/{TODAY}/print").get_data(as_text=True)
+    assert "already have recorded outcomes" in page
+
+
+def test_add_call_after_the_fact(instructor):
+    page = instructor.get(f"/instructor/day/{TODAY}").get_data(as_text=True)
+    student_id = re.search(r'<option value="(\d+)">', page).group(1)
+    good_id = re.search(r'value="(\d+)">GOOD</option>', page).group(1)
+
+    resp = instructor.post(
+        f"/instructor/day/{TODAY}/add",
+        data={
+            "student_id": student_id,
+            "status": "answered",
+            "assessment": good_id,
+            "note": "volunteered",
+        },
+        follow_redirects=True,
+    )
+    page = resp.get_data(as_text=True)
+    assert len(re.findall(r'name="status-(\d+)"', page)) == 1
+    assert 'value="volunteered"' in page
+
+    # Junk student ids are rejected.
+    resp = instructor.post(
+        f"/instructor/day/{TODAY}/add",
+        data={"student_id": "99999", "status": "answered"},
+    )
+    assert resp.status_code == 400
+
 
 def test_day_edit_saves_outcomes(instructor):
     instructor.post(f"/instructor/day/{TODAY}/generate", data={"n": "2"})