evo v0.68.13

Added

• GitHub commit diff links — merge hash in each ledger entry now links to the commit diff on GitHub.
• GitHub release link detection — detects cross-repo releases from GitHub Actions workflows (e.g. evo-releases).

Changed

• Report fonts — Inter (body) + JetBrains Mono (code/hashes) loaded via Google Fonts.
• CSS type scale — normalized to Major Third (1.250) with named design tokens (--text-xs through --text-3xl); spacing and radius tokens standardized.
• Timeline redesign — two-row layout (proposal + delta chip on primary line, date/cost on secondary) replaces single wrapped row; only test count delta shown at glance level.
• Palette brightened — bg #0d1117→#111820, bg2 #161b22→#1c2128, border #30363d→#373e47, text/muted lifted for better contrast while staying dark mode.