Release v0.6.1: M2A deep-path test & robustness hardening (#68)

[smartlabsAT]

Closes #68.

Follow-up to #67 (v0.6.0): closes the deferred test-coverage and robustness gaps in the M2A deep-path template feature. No functional behavior change — pure hardening, two tiny robustness fixes, and unit coverage. Verified live + adversarially reviewed.

Changes

Refactor / robustness (production code, behavior-preserving)

• Extract resolveUserLanguage(userStore) into a pure, typed helper (UserStoreLike/UserLike) and use it at both call sites (EditableCellRelational.vue, useLanguageSelector.ts), dropping the as any casts. Behavior identical at both sites (incl. the '' / null / undefined paths).
• buildQueryFingerprint: normalize sort to ?? null (consistent with filter/deep/alias) and canonicalize nested object key order via a typed stableReplacer (null- and array-guarded; arrays keep their order). The fingerprint is a dedup-only comparison key — it never forms the wire query.
• Document the coalesce reject invariant and the api listing-search path (comments only).

Tests (close the #68 gaps, no duplication of existing coverage)

• resolveUserLanguage: set / null / null-store / share-without-language / empty-string.
• buildQueryFingerprint: nested key reorder -> equal; reorder inside array elements -> equal; array element order significant -> differs; deep value change -> differs; sort null vs undefined -> equal.
• Non-default translation language field (junction_field: 'lang') at the render (renderM2ATemplate) and query-expansion (expandTokensThroughRelation) levels — "detected, not hardcoded languages_code".
• Deep M2O chains: pure M2O -> M2O -> scalar resolve, and validateDeepPath M2O -> M2O -> invalid-leaf naming the deepest collection.
• listPickerFields: single file drillable (directus_files); to-many files / o2m omitted.

Out of scope (deferred): the super-table.vue consolidation items (#8/#9 in the issue) are structural refactors and belong in a separate issue. No version bump (left for the next release).

Verification

• vitest: 404/404 (16 added on this branch). vue-tsc, ESLint --max-warnings=0, Prettier — all green. (The one timing-based useExistingLanguageDetection > should be performant flake passes on retry; pre-existing, untouched here.)
• Live Playwright regression against Directus 11.11.0 (M2A nested-translation preset): nested-translation render (de-DE / en-US / no-suffix -> user-language -> first-row fallback), invalid-token graceful degradation (dedup warn, no 403), M2O-chain, native-search-drives-layout and single items+count fetch pair — all identical to pre-change; zero console errors.
• Adversarial code review of the diff: merge-ready, no critical/important findings.

Test plan

• Unit suite green (incl. new tests)
• type-check / lint / format green
• Live render regression (nested translations, language variants)
• Invalid-token graceful degradation (no 403)
• Search wiring + single fetch pair unchanged
• No console errors

[github-actions]

Quality Check Results

TypeScript Type Check

✅ Passed - No type errors found

ESLint

✅ Passed - No linting errors

Prettier Format Check

✅ Passed - Code is properly formatted

Build

✅ Passed - Extension builds successfully

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Updated: 2026-06-13T10:53:03.024Z