fix(core): include selected filenames in FileInput trigger name

[bhamodi]

Summary

The FileInput trigger is a role="button" div that sets aria-label={label} (FileInput.tsx:737). Per accname computation, aria-label suppresses the element's child content from the accessible name -- and the selected filenames render as children (fileNames in both renderDropzoneContent and renderCompactContent). So a screen-reader user who tabs back to the control after selecting files hears only the field label, with no way to tell what (if anything) is attached. The one-time pick announcement from #3447 (7d90206, useAnnounce) is transient by design; the persistent name never reflected the selection.

This composes the filenames into the label: aria-label={hasFiles && fileNames ? ${label}, ${fileNames} : label}. With files selected the trigger reads e.g. "Document, report.pdf"; with none it stays exactly the label. It reuses the existing hasFiles/fileNames derivations (already comma-joined for multiple files) -- no renderer restructuring, no new strings.

Prior FileInput a11y work: 7dfac3a (#3404, forms-6) moved aria-describedby/required/invalid onto this same focusable trigger, and 7d90206 (#3447, forms-17) added the pick-time live-region announcement. This fills the remaining gap: the persistent accessible name.

Changes

• FileInput/FileInput.tsx: compose the trigger's aria-label from the label plus fileNames when files are selected (one attribute; falls back to plain label when empty), with a comment explaining why child content alone is not enough.
• FileInput/FileInput.test.tsx: new trigger accessible name describe block (4 tests) -- single file included in the name, multiple files all present (comma-joined), no files means the name is exactly the label, and dropzone mode covered.
• .changeset/fileinput-trigger-name.md: patch changeset.

Test plan

• node_modules/.bin/vitest run --root . packages/core/src/FileInput -- 53 pass (was 49). The 3 positive new tests (single, multiple, dropzone) fail pre-fix with the trigger named only "Document"/"Files"/"Upload"; the label-only test guards against regression in the empty state.
• node_modules/.bin/vitest run --root . packages/core -- 4585 pass, 203 files (full core suite).
• node_modules/.bin/tsc --project packages/core/tsconfig.json --noEmit -- clean.
• node_modules/.bin/eslint + prettier --check on changed files -- clean.

Notes

Found during a broader a11y audit of core components; scoped to one fix per PR.

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Project	Deployment	Actions	Updated (UTC)
astryx	Ready	Preview, Comment	Jul 15, 2026 2:34pm

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PR Analysis Report

No new or modified components detected.

Bundle Size Summary

Package	Size (ESM)	Size (CJS)	Gzipped
@astryxdesign/core	N/A	4.6KB	0B

Accessibility Audit

Status: No accessibility violations detected.

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