feat: complete reorganize-long-files cleanup

- Extract tool instance lifecycle endpoints (start/stop/restart/delete) from
  api/tool/tool_instances.py into new api/tool/tool_lifecycle.py.
- Register tool_lifecycle_router in main.py and api/tool/__init__.py.
- Extract inline WorkspaceDetailPage components into
  components/features/workspace/: detail header, tab bars, file/git/tools/settings
  panels. Slim page from ~446 to ~62 lines.
- Update OpenSpec reorganize-long-files tasks to reflect completed work and
  current source state; mark change completed.
- Regenerate project maps.

Quality gates: python3 -m py_compile (backend clean), npm run typecheck,
npm run lint, npm test -- --run (87 passed), pytest workspace integration
and unit tests (27 passed, 1 skipped).

apps/api/src/main.py

@@ -21,6 +21,7 @@ from src.api.tool import (
     sessions_router,
     tool_definitions_router,
     tool_instances_router,
+    tool_lifecycle_router,
     tool_types_router,
 )
 from src.api.user import auth_router, ssh_keys_router, users_router
@@ -165,6 +166,7 @@ app.include_router(tool_types_router)
 app.include_router(tool_definitions_router)
 app.include_router(config_profiles_router)
 app.include_router(tool_instances_router)
+app.include_router(tool_lifecycle_router)
 app.include_router(sessions_router)
 app.include_router(instance_proxy_router)
 app.include_router(terminal_router)