feat: ship production local assurance viewer in core

packaging/levels.json

@@ -7,7 +7,7 @@
       "level": 1,
       "package_names": ["casan-core", "casan-harness"],
       "status": "implemented",
-      "summary": "Minimal H1-H7 production runtime: security/action gates, evidence pack, audit, cost/telemetry, policy/config defaults, adapters, and lightweight CLI. Source-only tests and Platform helpers are excluded.",
+      "summary": "Minimal H1-H7 production runtime: security/action gates, evidence pack, audit, cost/telemetry, policy/config defaults, adapters, lightweight CLI, and a zero-dependency single-project Local Assurance Viewer with H1-H7, H6, history and on-demand export. Source-only tests and Platform helpers are excluded.",
       "target_users": ["governance-harness-only projects", "BJT initial adoption", "CI gate usage"],
       "includes": [
         "packages/casan-harness",
@@ -43,6 +43,7 @@
         "docs/packaging/DOMAIN_PACK_GUIDE.md",
         "docs/packaging/DOCKER_GUIDE.md",
         "docs/packaging/CASAN_PACKAGING_PLAN.md",
+        "docs/packaging/CORE_LOCAL_ASSURANCE_VIEWER.md",
         "scripts/package-release.sh"
       ],
       "artifact": "casan-devkit-v{VERSION}.tar.gz"