fix(3815): phase.insert handles checked-bullet ROADMAP format (#79)

* fix(3815): phase.insert parser handles checked-bullet ROADMAP format

phaseInsert (TS) and cmdPhaseInsert (CJS) previously used a heading-only
regex (#{2,4}\s*Phase\s+N:) to locate the target phase.  On projects whose
ROADMAP uses the checked-bullet format (- [ ] **Phase N: name** or
- [ ] Phase N: name), the lookup always failed with "Phase N not found".

Extend the locator to also accept the bullet form — mirroring the patterns
already used by phaseRemove and phaseComplete.  When bullet-style is
detected, insert a new bullet entry after the matched line (preserving
bold/plain style to match surrounding entries).  The heading-style code
path is unchanged.

Also fix a pre-existing test timeout: the first registry-integration test in
phase-lifecycle.test.ts was failing with STACK_TRACE_ERROR (masked timeout)
because the cold import of index.js takes >5 s.  Added { timeout: 30_000 }.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* fix(3815): refine hybrid-ROADMAP detection, preserve #3098 parity

Tighten the bullet-style branch guard: only treat a ROADMAP as
bullet-style (and apply the bullet-insert path) when it contains
ZERO heading-style phase entries (anyHeadingPattern test).  A
mixed (hybrid) ROADMAP — headings for some phases, bullet summaries
for others — is the #3098 case where the detail section is absent;
that path must still error with "missing a detail section".

Adds a regression test (#3098 preserved) in both TS and CJS to
confirm that a heading-style ROADMAP with a bullet-only entry for
the target phase still fires the "missing a detail section" error,
not the bullet-insert path.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* chore: add changeset for #3815 phase.insert bullet-roadmap fix

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/phase.test.cjs

@@ -1357,13 +1357,20 @@ describe('phase insert command', () => {
   });
 
   test('reports actionable error for summary-only placeholder phase without detail section (#3098)', () => {
+    // #3098: a hybrid ROADMAP that has heading-style phases for some phases
+    // but only a bullet summary entry for phase 5 (the detail section is
+    // missing).  Insert must fail with "missing a detail section" rather than
+    // silently inserting in bullet-style — because the surrounding ROADMAP
+    // uses headings, so the absent `### Phase 5:` is a genuine omission.
+    // (Compare with the #3815 case below: a purely bullet-style ROADMAP that
+    // has NO heading-style phases at all is valid and insert should succeed.)
     fs.writeFileSync(
       path.join(tmpDir, '.planning', 'ROADMAP.md'),
-      `# Roadmap\n\n- [ ] **Phase 5: Placeholder**\n`
+      `# Roadmap\n\n### Phase 4: Foundation\n**Goal:** Setup\n\n- [ ] **Phase 5: Placeholder**\n`
     );
 
     const result = runGsdTools('phase insert 5 Hotfix', tmpDir);
-    assert.ok(!result.success, 'should fail when phase is summary-only placeholder');
+    assert.ok(!result.success, 'should fail when phase is summary-only placeholder in a heading-style ROADMAP');
     assert.ok(result.error.includes('missing a detail section'));
   });