feat(ui): drop shorthand classname parser — object-form css() only

[viniciusdacal]

Summary

Phase 4 (final phase) of the drop-classname-utilities feature. Removes the legacy string-shorthand classname parser (['p:4', 'bg:background']) now that all call sites have been migrated to object-form css() + token.*.

Public API Changes

Breaking (pre-v1)

• Removed exports from @vertz/ui: s, UtilityClass, StyleEntry, StyleValue, parseShorthand, resolveToken, ShorthandParseError, TokenResolveError, InlineStyleError, isKnownProperty, isValidColorToken
• Removed compiler diagnostics: css-unknown-property, css-invalid-spacing, css-unknown-color-token, css-malformed-shorthand
• css() and variants() now accept object-form only (StyleBlock). Array-form input no longer type-checks and is not extracted by the compiler.

Additions

• None (Phase 4 is removal-only)

Migration

Already performed across first-party packages in Phase 3 (#2792). External users should migrate:

// Before
import { css } from '@vertz/ui';
const s = css({ panel: ['p:4', 'bg:background', 'rounded:lg'] });

// After
import { css, token } from '@vertz/ui';
const s = css({
  panel: {
    padding: token.spacing[4],
    backgroundColor: token.color.background,
    borderRadius: token.radius.lg,
  },
});

Deletions

TypeScript:

• packages/ui/src/css/shorthand-parser.ts (~3.5 KB source)
• packages/ui/src/css/token-resolver.ts (~18 KB source)
• packages/ui/src/css/token-tables.ts (~18.6 KB source)
• packages/ui/src/css/utility-types.ts (~6.3 KB source)
• packages/ui/src/css/s.ts (~2 KB source)
• scripts/migrate-classnames/ (migration tool — migration complete)

Rust:

• native/vertz-compiler-core/src/css_diagnostics.rs
• native/vertz-compiler-core/src/css_token_tables.rs

Tests:

• native/vertz-compiler/__tests__/css-transform.test.ts and css-diagnostics.test.ts (exercised removed parser)
• Transient back-compat tests in css-object-form.test.ts / variants-object-form.test.ts

Additions

• packages/ui/src/__tests__/removed-exports.test-d.ts — 11 negative type tests proving each removed symbol is no longer importable from its former export paths.
• compileTheme() regains a collision detector (Map-based) that throws when two color token paths would produce the same --color-* CSS variable (e.g. primary.foreground vs primary-foreground). Replaces the older check that depended on the deleted COLOR_NAMESPACES table.

Phases

• Phase 1 — Object-form css() end-to-end (PR feat(ui): drop classname utilities — object-form css() + token.* helper #2769)
• Phase 2 — token.* helper + typed augmentation (included in feat(ui): drop classname utilities — object-form css() + token.* helper #2769)
• Phase 3 — Migrate first-party call sites (PR feat: Phase 3 — migrate call sites to object-form css() + token.* #2792)
• Phase 4 — Delete shorthand parser (this PR)

Review

Local adversarial review at reviews/drop-classname-utilities/phase-04-delete.md. Three blockers (stale NAPI tests, transient back-compat tests, docs still teaching the removed API) and three should-fix items (architecture doc, ui-primitives README, theme collision regression) all addressed in follow-up commits.

Test plan

• @vertz/ui — 2315 tests pass
• @vertz/theme-shadcn — 136 tests pass
• @vertz/ui-auth — 70 tests pass
• packages/ui typecheck clean (tsgo --noEmit)
• cargo test --all passes
• cargo clippy --all-targets -- -D warnings clean
• cargo fmt --all -- --check clean
• oxlint packages/ — 0 errors
• oxfmt --check packages/ clean
• Pre-push lefthook passes (build-typecheck, test, lint, rust-fmt, rust-clippy, rust-test, trojan-source)
• Grep repo for removed symbols — zero matches outside intentional negative type tests
• Docs migrated (mint-docs, site, READMEs) — zero array-form examples remain

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