Upgrade ng-packagr, vitest, and eslint where each was actually causing a problem

.changeset/quiet-pugs-wait.md

@@ -0,0 +1,14 @@
+---
+---
+
+No release needed for core, react or vue. Everything this branch changed in
+them is tooling that never ships: `packages/core` swapped devDependencies and
+`vitest.config.js` moving from vitest 0.34 to 1.6, and core and vue each lost a
+stale `eslint-disable` comment during the eslint 9 migration. `files` publishes
+`dist` alone, and the built `dist` for all three is byte-identical to develop —
+checked by building both revisions and diffing.
+
+Recorded so the changeset check has an answer for them, rather than being
+satisfied by version bumps that would publish identical tarballs. Only
+`@dynamic-field-kit/angular` genuinely changed what it ships, and it has its own
+changeset.

.changeset/tidy-moons-repeat.md

@@ -0,0 +1,25 @@
+---
+'@dynamic-field-kit/angular': patch
+---
+
+Build with ng-packagr 19 instead of 17, which is what the package's Angular
+version has needed all along — ng-packagr 17 declared peers of
+`@angular/compiler-cli ^17` and `typescript >=5.2 <5.5` against an installed
+19.2.25 and 5.6.3, so installing needed `--legacy-peer-deps`.
+
+The bundle consumers actually load is unchanged: `fesm2022` is byte-identical,
+as are `index.d.ts` and `public-api.d.ts`. What changes is the rest of the
+tarball. ng-packagr stopped emitting the per-file `esm2022/` output in 18,
+because the fesm2022 bundle is what the Angular linker consumes, and its
+`esm2022` and `esm` export conditions go with it. The `.` export keeps `types`
+and `default`, matching what every Angular 19+ library ships.
+
+|          | Before   | After           |
+| -------- | -------- | --------------- |
+| Unpacked | 317.1 KB | 165.9 KB (−48%) |
+| Tarball  | 75.8 KB  | 33.7 KB (−56%)  |
+| Files    | 33       | 19              |
+
+If you were resolving this package through the `esm` or `esm2022` condition
+explicitly, resolution now falls through to `default`, which points at the same
+fesm2022 file those conditions already resolved to.

eslint.config.mjs

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+import js from '@eslint/js';
+import prettierConfig from 'eslint-config-prettier';
+import importPlugin from 'eslint-plugin-import';
+import globals from 'globals';
+import tseslint from 'typescript-eslint';
+
+// Flat config, replacing .eslintrc.cjs + .eslintignore. eslint 9 reads neither.
+export default tseslint.config(
+  // Global ignores. These were .eslintignore, which eslint 9 no longer reads,
+  // plus the old ignorePatterns. The example apps and smoke workspace stay out:
+  // the `lint` script never covered them, but the pre-commit hook matches *.js
+  // anywhere, and linting them against a config written for library source
+  // fails on things like a `require` in next.config.js or an import it cannot
+  // resolve from an example's own node_modules. They are still
+  // prettier-checked, typechecked by their own builds, and built in CI.
+  {
+    ignores: [
+      '**/dist/**',
+      '**/node_modules/**',
+      '**/coverage/**',
+      '**/.nyc_output/**',
+      '**/*.d.ts',
+      '**/*.log',
+      'example/**',
+      'smoke/**',
+    ],
+  },
+
+  js.configs.recommended,
+  ...tseslint.configs.recommended,
+  importPlugin.flatConfigs.recommended,
+  importPlugin.flatConfigs.typescript,
+
+  // eslint-config-prettier only turns off rules that fight the formatter.
+  // Formatting itself is not linted: `npm run format-check` is its own CI gate
+  // and lint-staged runs `prettier --write` before eslint, so running prettier
+  // through eslint as well would be a slower second copy of a check that
+  // already exists.
+  prettierConfig,
+
+  {
+    files: ['**/*.{js,cjs,mjs,ts,tsx}'],
+    languageOptions: {
+      globals: { ...globals.node, ...globals.es2021 },
+      ecmaVersion: 2021,
+      sourceType: 'module',
+    },
+    settings: {
+      'import/resolver': {
+        node: { extensions: ['.ts', '.tsx', '.js', '.jsx'] },
+      },
+      'import/ignore': ['node_modules', '\\.d\\.ts$'],
+    },
+    rules: {
+      curly: 'error',
+      eqeqeq: 'error',
+      semi: ['error', 'always'],
+      'no-console': 'off',
+      '@typescript-eslint/no-use-before-define': ['error'],
+      '@typescript-eslint/no-unused-vars': [
+        'error',
+        { argsIgnorePattern: '^_' },
+      ],
+      '@typescript-eslint/no-explicit-any': 'off',
+      'max-len': ['error', { code: 120 }],
+      'prefer-const': 'error',
+      'import/order': [
+        'error',
+        {
+          groups: [
+            'builtin',
+            'external',
+            'internal',
+            'parent',
+            'sibling',
+            'index',
+          ],
+          alphabetize: { order: 'asc', caseInsensitive: true },
+        },
+      ],
+      'import/no-unresolved': [
+        'error',
+        { ignore: ['^@angular', '^vue', '^@dynamic-field-kit'] },
+      ],
+    },
+  },
+
+  // CommonJS build scripts and config files.
+  {
+    files: ['scripts/**/*.js', '**/*.cjs'],
+    languageOptions: { sourceType: 'commonjs' },
+    rules: { '@typescript-eslint/no-require-imports': 'off' },
+  }
+);