v1.13.7

What's Changed

• release: v1.13.7-dev.1 — sync dev tag with master by @ranxianglei in #191
• test: E2E scenario for subagent compression by @ranxianglei in #192
• feat: per-session SessionState registry by @ranxianglei in #184
• ci: run E2E tests on every PR by @ranxianglei in #194
• fix: remove erroneous acknowledgeRisk from E2E scenario 05 by @ranxianglei in #195
• fix: preserve first user message to guarantee API validity by @ranxianglei in #196
• release: v1.13.7 — per-session state + inactive block fixes + preserve first user by @ranxianglei in #197

Full Changelog: v1.13.6...v1.13.7