• Merge pull request #1463 from kaitranntt/kai/fix/stale-account-visual-groups-test
• Merge pull request #1457 from sgaluza/feat/claude-opus-4-8
• Merge remote-tracking branch 'origin/dev' into kai/validate/pr-1457
• test(accounts): align stale free-tier expectations with current grouping
• docs(pricing): document legacy 4-7-thinking entry; cover tier metadata
• fix(pricing): restore opus version order; cover 4.6/4.7 fast-tier rates
• refactor(pricing): share Opus fast-tier rate constants
• refactor(pricing): derive fast-tier cache rates via buildRates helper
• test(accounts): align stale free-tier expectations with current behavior
• Merge remote-tracking branch 'upstream/dev' into feat/claude-opus-4-8
• feat(pricing): support per-service-tier rates; wire Opus fast mode
• feat(catalog): add Claude Opus 4.8 to Anthropic model registry