051fbb9be5
Adds add_subdirectory block for apps/kanban_cpp (lives in apps/ per issue 0096). The app itself is a sub-repo (gitignored via apps/*/), with its own git history and master branch initialized. Six panels reuse registry: http_request_cpp_core, kpi_card_cpp_viz, sparkline_cpp_viz, agent_runs_timeline_cpp_viz, dod_evidence_panel_cpp_viz. Backend Go on :8403 (independent operations.db from kanban_web).