[buttercode101]

Verified defects addressed

• Keep the demo cadence column available on narrow screens inside an accessible horizontal table region instead of hiding it.
• Preserve activity outcome/status on mobile rather than hiding the last column.
• Expose filter state with aria-pressed and keyboard focus treatment.
• Pin each browser-computed proof digest to the independent SHA-256 recorded in proofs-manifest.json; previously only the bundle's own embedded digest was checked.
• Handle missing/malformed ledgers and individual proof-fetch failures without aborting the entire proof index.
• Restrict proof JSON URLs to same-origin paths and label signatures as present but unverified.

Regression coverage

Added tests for mobile table/status visibility, accessible filter state, independent manifest digest verification and malformed-proof handling.

No changes to Habitat's data model, canonical proof generation, storage or ledger mutation.

[vercel]

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