[devXyi]

Summary

• Add an animated gradient banner and rotating typewriter tagline.
• Add expandable navigation panels, a Mermaid simulation flow, and clearer section scanning.
• Document the air-gap control-plane prototype: per-operator authentication, signed bundles, rollback/hash verification, Ed25519-signed hash-chain ledger, internal engine routing, and no-network test coverage.
• Replace the Raksha roadmap-only text with the implementation that exists: STIX 2.1 model, TAXII 2.1 read-only API, CISA KEV / FIRST EPSS / GDELT / NASA FIRMS parsers, ABAC, transparent uncalibrated scoring, cascade simulation, and back-test harness.
• Add the repository's documented test totals and explicit limitations; correct Healtho status to planned and avoid claiming that unverified deployments are live.

Validation

• Re-fetched the README after the commit and checked that the six expandable HTML sections remain balanced.
• Confirmed no script tags were introduced and the existing API, security, module, and licensing sections remain present.
• Verified that Raksha's synthetic-fixture / uncalibrated limitations and the air-gap certification caveat are stated.
• Test counts are attributed to docs/AUDIT_FIXES.md (authoring-sandbox record); they are not represented as the current PR's CI results.

Animated banner/tagline depend on external image services. The README content remains readable if they are unavailable.

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