feat: Add Storybook configuration and motion tokens implementation

- Introduced Storybook configuration files (`main.ts`, `preview.ts`, `tsconfig.json`) for Angular components.
- Created motion tokens in `motion-tokens.ts` to define durations, easing functions, and transforms.
- Developed a Storybook story for motion tokens showcasing their usage and reduced motion fallback.
- Added SCSS variables for motion durations, easing, and transforms in `_motion.scss`.
- Implemented accessibility smoke tests using Playwright and Axe for automated accessibility checks.
- Created portable and sealed bundle structures with corresponding JSON files for evidence locker.
- Added shell script for verifying notify kit determinism.

docs/modules/evidence-locker/evidence-bundle-v1.md

@@ -51,7 +51,8 @@ Frozen contract for Evidence Bundle v1 covering AdvisoryAI/Concelier/Excititor e
 
 ## Attestation linkage
 - See `attestation-scope-note.md` for required claims.
-- Subject digest should reference the tarball sha256; include `bundle_id` and `tenant`.
+- DSSE subject uses the Merkle root derived from `checksums.txt` (sha256 of sorted entry hashes). Record the OCI tarball digest as metadata, not the subject.
 
 ## Change log
+- 2025-12-04: Updated subject to Merkle root and aligned with EB1–EB10 docs/fixtures.
 - 2025-11-19: v1 frozen (initial publication). Add real sample tarball + hashes once produced.