v0.2.7

Ships the prompt→chart-type selection improvements to the live suggest_chart_type tool.

Fixed

• Plural-stemmer over-stripping in the selection scorer: the -es rule mangled moves→mov, states→stat, names→nam, files→fil. It now fires only after a sibilant (x/z/ch/sh/ss), so moves→move/states→state while boxes→box/watches→watch stay correct. Natural-language prompts using those words now land on the right chart type (+2 on the selection corpus, no regressions).

Added

• Optional score breakdown: {contig, idf, desc} on scoreChartType (additive, back-compat).
• Improved trigger vocabulary across several chart types.
• Dev-only selection-tuning harness (pnpm harness) + a committed corpus regression gate — not shipped in the npm package.

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