fix(story-mode): in a turn a helper's report started, looking around is checking what came back

From review round 12: after a helper reported back, Claude's `git log`,
`git show --stat` and a diff of the README example against real output
read "Claude looks around the project". In a turn a report started, a
look that names no file now reads "Claude checks the work that came
back."

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

test/fixtures/story-corpus/text-plan-dry-run-helper.expected.json

@@ -151,7 +151,7 @@
       {
         "kind": "investigate",
         "ok": null,
-        "story": "Claude looks around the project.",
+        "story": "Claude checks the work that came back.",
         "unaskedSave": false,
         "director": "Bash · git log --oneline && git status --short && git show --stat…",
         "balloon": null,

test/story-corpus.test.ts

@@ -216,6 +216,11 @@ describe('Story Mode on real sessions', () => {
     expect(marked('question-tests-first-push')).toEqual([]);
   });
 
+  it('in a turn a helper report started, looking around is checking what came back (round 12)', () => {
+    const [, report] = pagesOf('text-plan-dry-run-helper');
+    expect(report.panels.map((p) => p.story)).toContain('Claude checks the work that came back.');
+  });
+
   it('a helper reporting back is heard in its own words, not only "finished" (round 9)', () => {
     const [, readme, extra] = pagesOf('background-helpers-reports');
     expect(readme.panels[0].balloon).toBe(