fix(story-mode): commits in montages, lint verdicts, and a page that holds still

From review round 2 (a long turn, and a prompt added mid-turn):

- Commits fold last and a montage names them ("saves the work in 3
  commits"); a save counts its commits ("saves the work in 6 commits").
  Before, all three commits of a 16-step turn vanished into montages that
  read "runs 2 commands".
- Folding a full page starts at the oldest pair and grows a montage already
  there, and never takes the newest panel while another choice exists: a
  live page no longer reshuffles panels the reader is watching.
- A check whose output reports problems ("1 file would be reformatted",
  "Found 3 errors", "✖ 5 problems", `error TS…`) failed, though a trailing
  `; ls` hid the exit code: "The tests pass, but another check fails."
- Shell structure is not a command (`for x in`, `do`, `done`, `if`), so a
  `--version` probe in a loop reads as looking; `command -v` and
  `git config --get` too.
- The montage draws only the kinds of steps it folded, with a box for
  saves; the loop's arrow has a head and rests on a finished page; the
  "MISSION COMPLETE!" title has room for its tilt; drawer commands keep
  their line breaks.

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

test/story-mode.test.ts

@@ -13,6 +13,7 @@ import {
   firstSentence,
   heredocWrites,
   parseTestCounts,
+  reportsProblems,
   planFromText,
   printedFiles,
   roughDuration,
@@ -71,6 +72,10 @@ describe('classifyBashCommand', () => {
     // A here-document's body is data: `pytest.main()` in it runs nothing.
     ["cat > app.py <<'EOF'\nimport pytest\npytest.main()\nEOF", 'edit'],
     ['git commit -m "ignore pytest caches"', 'save'],
+    // Shell structure is not a command; read-only probes are looking.
+    ['for t in ruff flake8; do $t --version; done', 'look'],
+    ['command -v ruff; git config --get user.name', 'look'],
+    ['if pytest -q; then echo ok; fi', 'test'],
     ['node --test timer.test.mjs 2>&1 | tail -20', 'test'],
     ['timeout 60 npm test', 'test'],
     ['FOO=1 CI=true pytest -q', 'test'],
@@ -118,6 +123,14 @@ describe('parseTestCounts beyond "N passed"', () => {
     expect(parseTestCounts(output)).toEqual(counts);
   });
 
+  it('reportsProblems reads linters, formatters and type checkers', () => {
+    expect(reportsProblems('Found 3 errors.\n[*] 2 fixable')).toBe(true);
+    expect(reportsProblems('1 file would be reformatted, 4 files already formatted')).toBe(true);
+    expect(reportsProblems('✖ 5 problems (3 errors, 2 warnings)')).toBe(true);
+    expect(reportsProblems("src/a.ts(3,1): error TS2322: Type 'x' is not assignable")).toBe(true);
+    expect(reportsProblems('All checks passed!\n5 files already formatted\nFound 0 errors.')).toBe(false);
+  });
+
   it('a line that only mentions a failure is not a summary', () => {
     expect(parseTestCounts('The request failed twice: 2 failed attempts')).toBeNull();
   });
@@ -726,6 +739,45 @@ describe('buildStoryPage', () => {
     expect(page.panels.find((p) => p.kind === 'save')!.balloon).toBeUndefined();
   });
 
+  it('a check whose output reports lint problems failed, though a trailing ls hid the exit code', () => {
+    const page = pageOf([
+      prompt('check'),
+      ...bash(
+        'b1',
+        'pytest -q | tail -1; ruff format --check .; ls',
+        'Tests and format',
+        '6 passed in 0.1s\n1 file would be reformatted\nREADME.md'
+      ),
+      end(1000),
+    ]);
+    const check = page.panels.find((p) => p.kind === 'check')!;
+    expect(check.ok).toBe(false);
+    expect(check.caption.story).toBe('The tests pass, but another check fails.');
+  });
+
+  it('a save counts its commits, and a montage names what it folded, commits included', () => {
+    const page = pageOf([
+      prompt('commit'),
+      ...bash('b1', 'git add a && git commit -qm a && git add b && git commit -qm b && git push', 'Commit twice', 'ok'),
+      end(1000),
+    ]);
+    expect(page.panels.find((p) => p.kind === 'save')!.caption.story).toBe(
+      'Claude saves the work in 2 commits and sends it up.'
+    );
+    const lines: unknown[] = [prompt('many steps')];
+    for (let i = 0; i < 14; i++) {
+      lines.push(...read(`r${i}`, `/w/f${i}.ts`));
+      lines.push(...bash(`c${i}`, `git commit -qm step${i}`, `Commit ${i}`, 'ok'));
+    }
+    lines.push(end(60_000));
+    const long = pageOf(lines);
+    const montages = long.panels.filter((p) => p.kind === 'montage');
+    expect(montages.length).toBeGreaterThan(0);
+    expect(montages.some((p) => /saves the work/.test(p.caption.story))).toBe(true);
+    // The newest panels keep their place: folding starts at the oldest.
+    expect(long.panels[long.panels.length - 2].kind).not.toBe('montage');
+  });
+
   it('a loop ends at its last check; writes after it are a panel of their own', () => {
     const page = pageOf([
       prompt('tdd'),