fix(spec): a joined report draws no chart — retire blocks[].chart and refuse a joined container chart (#20161) - #20238

fix(spec): a joined report draws no chart — retire blocks[].chart and refuse a joined container chart (#20161)#20238

objectstack-fleet[bot] merged 13 commits into

mainobjectstack-ai/objectstack:mainfrom

claude/issue-20161-joined-report-chart-retiredobjectstack-ai/objectstack:claude/issue-20161-joined-report-chart-retiredCopy head branch name to clipboard