When Claude Code spawns bash tools (test suites, builds, servers), the
respawn controller could falsely detect idle if terminal output paused.
Now checks the process tree for active children of the Claude process
before triggering AI idle checks or confirming idle state.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Consolidate duplicated MockSession/MockStateStore into test/mocks/,
migrate respawn tests to shared mocks, and add 58 route tests for
session, system, and respawn endpoints using Fastify app.inject().
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
