feat(read): ratings, Scholar discovery, and citation details

[agentfleets]

Summary

• add clickable literature ratings, rating sorting, horizontal table scrolling, and balanced fixed-width columns
• keep terminal session tab headers draggable and compact the Read inspector metadata layout
• add secure Google Scholar discovery through the Vault-managed SerpAPI key and proxy-aware native transport
• delay browser webview navigation until proxy setup completes and remove the misleading Chrome user-agent rewrite
• preserve Scholar citation provenance, show Scholar and OpenAlex counts separately, and load detailed citing papers on demand
• validate title-only OpenAlex matches before attaching enrichment data

Verification

• frontend production build
• Electron production build
• Electron tests: 619 passed, 0 failed, 2 skipped
• targeted discovery normalization and OpenAlex identity tests
• Playwright coverage for ratings, scrolling, metadata layout, and provider-aware Cite data