T9.2 - CR-017: Actual Hours is still there, still optional, still counted

A guard, not a build. Removal was floated in the meeting and rejected -
Marlena tracks actual hours so they can be measured - and CLAUDE.md carries
that as a recorded decision. Verified after eight waves of change:

- Actual Hours exists in Closeout (wp_actual_hrs), persists through collect,
  and prints on the export
- it is OPTIONAL: a package closes with it empty (driven, not assumed)
- it rolls up per T6.4: rollup_check has pinned actual-hours aggregation at
  every level since wave 6, and /api/wps/metrics carries actual_hours in its
  buckets

The follow-up the done-when requires is logged as BL-023: a productivity
factor (actual / estimated) - the rollup endpoints already carry both sums,
so it is a presentation task awaiting its own item id and a placement call.

Verification: export_check.py extended to 20/20 (the CR-017 section).

Items: CR-017

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

tests/export_check.py

@@ -130,6 +130,28 @@ def main():
             fits["boxFits"] and fits["poke"] == 0, ascii_(fits))
         chk("390px: the base type is readable (>= 12px)", fits["font"] >= 12, ascii_(fits))
 
+        # ── 5. CR-017: the Actual Hours guard (T9.2) ─────────────────────────
+        # A guard, not a build: removal was floated and REJECTED - Marlena
+        # tracks actual hours. Verify it survived eight waves of change.
+        print(chr(10) + "5. CR-017: Actual Hours survived")
+        page.viewport(1440, 900)
+        settle(0.5)
+        chk("Actual Hours still exists in Closeout and persists",
+            page.eval("!!document.getElementById('wp_actual_hrs')")
+            and page.eval("collectPackage().actualHrs") == "54")   # the example's value
+        page.eval("document.getElementById('wp_actual_hrs').value=''")
+        page.eval("""(() => { pkgConstraints.forEach(c => c.status='na');
+          buildConstraints(); updateReleaseBanner(); })()""")
+        page.eval("document.querySelector('#status-group .radio-pill[data-val=%s]').click()"
+                  % json.dumps("Closed"))
+        settle(0.5)
+        chk("...it is OPTIONAL: a package closes without it",
+            page.eval("getRadio('status')") == "Closed",
+            page.eval("getRadio('status')"))
+        chk("...and the closeout prints it on the export",
+            "Actual" in page.eval("(() => { renderPackage(collectPackage()); "
+                                  "return document.getElementById('pkg-doc').textContent; })()"))
+
         js_errors = [e for e in page.js_errors() if "beforeunload" not in e]
         chk("no JavaScript errors anywhere in this run", not js_errors,
             ascii_(js_errors[:2]))