chore: fork dsh-better-sidebar v0.18.0 as dsh-apes-sidebar v1.0.0

- Rename dsh-better-sidebar → dsh-apes-sidebar across 74 files (262 occurrences)
- Bump version 0.18.0 → 1.0.0 (package.json + dsh.plugin.json + SIDEBAR_SERVICE_VERSION)
- Add forkedFrom metadata to package.json (upstream pin: commit 9e1a034)
- Add fork notice banner to README.md (MIT attribution preserved)
- Keep original MIT copyright (c) 2026 dsh-external
- Full gate green: typecheck + build (6 bundles) + test (1241 passed / 9 skipped)

tests/turn-tail-intercept.spec.ts

@@ -98,7 +98,7 @@ describe('turn-tail interception registration (issue #15)', () => {
     const { options, component } = fake.registered[0]!
     expect(options.name).toBe('conversation.chat.turnTail')
     expect(options.priority).toBe(-1)
-    expect(options.registrant).toBe('dsh-better-sidebar')
+    expect(options.registrant).toBe('dsh-apes-sidebar')
     expect(options.select).toBeTypeOf('function')
     expect(options.inject).toBeTypeOf('function')
     expect(component).toBeTypeOf('function')