feat(charts): combo 图从 mark 下钻,axis/surface 保持静默 (#4692)

.changeset/combo-mark-drill.md

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+---
+'@object-ui/plugin-charts': patch
+---
+
+Combo charts drill from their marks
+
+objectui#4692, ruled Option B. `AdvancedChartImpl` built `cartesianClickProps` once and
+applied it to exactly one element — the final cartesian `ChartComponent`. The `combo`
+branch returns earlier, from its own `ComposedChart`, which was rendered with `data` and
+no click props at all, so a combo chart fired `onChartClick` never: not on a mark, not on
+the axis. Its marks are the same `Bar` / `Line` / `Area` components the drillable branch
+renders.
+
+The trap that made this worth fixing rather than documenting is that the family is
+**derived**, not only authored: `effectiveChartFamily` resolves a chart to `combo`
+whenever its series declare different families (objectui#2945), so adding `type: 'line'`
+to one series of a drillable bar chart silently turned that chart's drill-through off —
+nothing in the authored spec said drill had been touched, and nothing errored.
+
+A combo's `Bar` / `Line` / `Area` marks now emit `{ category, categoryId, series, value }`
+with the same semantics the plain cartesian branch gives, reusing the item-level
+series-identity machinery from objectui#4672 / objectui#4682: the mark handler records the
+series it was rendered with, the chart-level handler composes the one event, so a gesture
+still produces exactly one `onChartClick`. Retyping one series now changes that series'
+mark and nothing else.
+
+**Only the marks drill.** A click on a combo's plot surface or axis stays silent, where
+the plain cartesian branch falls back to its axis-level answer. A combo plots several
+measures on one plot, so a surface click there has no single series to report and the
+fallback would have to invent one — the same reasoning objectui#4672's ruling gave the
+pivoted case. Combo also carries no chart-wide pointer cursor for that reason; the
+affordance sits on the marks that answer.
+
+Radar is now the one cartesian-adjacent family with no click wiring. The `onChartClick`
+doc comment, corrected in objectui#4705 to say combo was a no-op, states the new rule and
+its one deliberate exception.