fix(cli): prevent process exit under nohup & by resuming stdin and catching unhandled errors

fix: resolve nohup startup hang and stale activeDeviceId on rebind

test(router): add tests for device switch thread state cleanup

chore: bump version to 1.1.41

fix(router): clear stale thread state when switching devices

feat(cli): support image multimodal input for Claude Persistent Executor

feat: support image multimodal input from Feishu to Gemini

docs: swap README files to make English version the default

docs: cleanup stale references and update architecture descriptions

docs: update CHANGELOG, PLAN, and READMEs for v1.1.39

test: add concurrency and rapid command tests for executors and message handler

fix: preserve Gemini session after /abort and harden abort state machine

test: add comprehensive server.test.ts to boost router coverage to 89%

test: comprehensively cover FeishuLongConnHandler to reach 93% coverage

test: suppress expected error noise and fix flaky abort test