Release 2.26.0-beta.5

refactor(project): extract mate interaction into project-mate-interaction.js

refactor(project): extract memory functions into project-memory.js

docs(refactoring): update roadmap for current codebase and add state conventions

feat(context): add rich context usage popover on header bar hover

Release 2.26.0-beta.4

feat: Context Sources UI + Chat Project plan (#284)

Release 2.26.0-beta.3

Merge pull request #278 from leiyangyou/fix/rewind-race-conditions

Merge pull request #279 from leiyangyou/fix/session-atomic-writes

Merge pull request #280 from leiyangyou/fix/mate-avatar-sync

Merge pull request #281 from leiyangyou/fix/usage-cost-tracking

fix(usage): handle SDK restart causing negative cost delta

fix(usage): stop resetting cumulative cost tracker between turns

feat(usage): show per-turn cost delta alongside cumulative total