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Chart builder: data-aware defaults, one-click hint fixes, canvas preview, fullscreen modal

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Oleh Omelchenko
2026-06-10 17:10:18 +03:00
parent 68a044752f
commit 62d0697f0e
20 changed files with 1133 additions and 73 deletions
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docs/architecture/06-type-inference.md
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@@ -301,8 +301,10 @@ trivially testable. The caller passes `null` for URL and non-tabular datasets.
### 3.3 Column stats: cardinality + numeric extent
Alongside the display type, each column carries the two data-shape signals the
**Chart Builder** needs for its data-aware Tier-B hints (spec §06; see
`chart-builder.ts` `builderWarnings`):
**Chart Builder** needs for its data-aware Tier-B hints (`chart-builder.ts`
`builderWarnings`) **and** for its default pre-population (`smartDefaultEncodings`
prefers a low-cardinality category over a high-cardinality key, so the builder never
opens on a degenerate chart; spec §06):
- **`distinct`** — the count of distinct non-empty values **in the sample**,
counted only up to `DISTINCT_CAP` (50). Past the cap the exact number stops