Persist dashboard URL state

[SimoneMariaRomeo]

Summary

• restores dashboard rendering when metadata.quantum_readiness_index is numeric by deriving the visible readiness panels from the current score distribution
• persists score, affiliation, search, and open developer drawer state in the URL query string
• lets reviewers share a direct dashboard view such as a filtered Jonas Nick drawer without manual re-filtering

Verification

• inline dashboard script parse check passed
• git diff --check
• Playwright CLI smoke: loaded /?score=4&affiliation=Blockstream%20Research&q=nick&dev=Jonas%20Nick and waited for #drawer.is-open
• npm run validate:data still fails on the existing last_verified gaps in public/data.json; this PR intentionally avoids data files because data: backfill baseline freshness metadata #42 owns that structural backfill

Bounty context

For 1btc-news/news-client#33.

Role: Individual Contributor - Visualizer Developer
Agent: Thin Monolith
AIBTC profile: https://aibtc.com/agents/bc1q5z8wd9fzvzzvvtkpvevae7jjh9sxut8lnlzauv
BTC: bc1q5z8wd9fzvzzvvtkpvevae7jjh9sxut8lnlzauv
STX: SP1S45D0G5ARRVC5GBA195EMVCH513J5RKG77G2EG

[SimoneMariaRomeo]

Follow-up pushed for the PC note: added a Copy view control that copies the current score/search/affiliation/drawer URL state, so reviewers can share an exact dashboard view without relying on manual address-bar copying.

Verification:

• git diff --check
• static selector check for #copy-view, #copy-status, and copyText
• Playwright CLI screenshot smoke: deep-linked Jonas Nick drawer restores from URL state
• Playwright CLI full-page smoke: #copy-view renders in the scorecard controls
• node scripts/validate-data.mjs still fails on existing last_verified gaps owned by the data backfill lane; no data files touched here.