v26.40.9

v26.40.9

• Dashboards: creating-good-dashboards lays dashboards out overview first, then zoom and filter, then details on demand; adds a "do next" actions block with effect sizes and evidence, calendar heatmaps, reuse of an existing gauge or visual system, and a list of generated-looking design tropes to avoid.
• Dashboards: querying-fabric writes faster, simpler DAX queries: all measures for a visual in one filter context, several periods as rows of a windows table instead of copied blocks, no FILTER over whole tables, no row-by-row iterators where a measure exists, no hard-coded dates, and data-quality flags (estimated, provisional rows) checked before querying. New query-performance.md reference with a measured before and after and a te query --runs benchmarking loop.