merge: incorporate origin/main into community-mode branch

Conflicts resolved:
- VERSION: keep 0.14.0.0 (our branch > main's 0.13.2.0)
- CHANGELOG.md: keep both entries, 0.14.0.0 above 0.13.2.0

Main brought in v0.13.2.0 "User Sovereignty": cross-model agreement
is now a recommendation not a mandate, /autoplan has two gates
(premises + user challenges), outside voice findings require explicit
approval, decision audit trail tracks classification.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

test/gen-skill-docs.test.ts

@@ -1304,6 +1304,7 @@ describe('Codex generation (--host codex)', () => {
     const content = fs.readFileSync(rootMetadata, 'utf-8');
     expect(content).toContain('display_name: "gstack"');
     expect(content).toContain('Use $gstack to locate the bundled gstack skills.');
+    expect(content).toContain('allow_implicit_invocation: true');
   });
 
   test('codexSkillName mapping: root is gstack, others are gstack-{dir}', () => {