feat: establish TypeScript-aware frontend tooling

tests/fixtures/architecture/allowed/presentation-facade.tsx

@@ -0,0 +1,7 @@
+import { createApplication } from "../../../../src/application/create-application.js";
+
+export const applicationFactory = createApplication;
+
+export function AllowedPresentationFixture() {
+  return <p>allowed</p>;
+}

tests/fixtures/architecture/forbidden/presentation-imports-adapter.tsx

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+import "../../../../src/adapters/http/client.js";
+
+export function InvalidPresentationFixture() {
+  return <p>invalid</p>;
+}

tests/fixtures/registry/forbidden/governance.json

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+{
+  "schemaVersion": 1,
+  "sourceDirectories": [],
+  "registries": [
+    {
+      "registryId": "FIXTURE-SOURCE",
+      "path": "tests/fixtures/registry/forbidden/invalid-registry.js",
+      "exportName": "INVALID_REGISTRY",
+      "owner": "fixture",
+      "requiredFields": ["id", "target"],
+      "uniqueFields": ["id"],
+      "references": [
+        {
+          "field": "target",
+          "registryId": "FIXTURE-TARGET",
+          "targetField": "id"
+        }
+      ]
+    },
+    {
+      "registryId": "FIXTURE-TARGET",
+      "path": "tests/fixtures/registry/forbidden/invalid-registry.js",
+      "exportName": "TARGET_REGISTRY",
+      "owner": "fixture",
+      "requiredFields": ["id"],
+      "uniqueFields": ["id"]
+    }
+  ],
+  "compatibilityImpact": {
+    "allowed": ["none", "additive", "behavior-change", "breaking"],
+    "current": "breaking"
+  }
+}

tests/fixtures/registry/forbidden/invalid-registry.ts

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+type InvalidRow = Readonly<{
+  id: string;
+  target?: string;
+}>;
+
+export const INVALID_REGISTRY: Record<string, InvalidRow> = {
+  FIRST: { id: "duplicate", target: "missing" },
+  SECOND: { id: "duplicate" },
+};
+
+export const TARGET_REGISTRY = {
+  KNOWN: { id: "known" },
+} as const;

tests/fixtures/security/allowed/safe-text.tsx

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+export function SafeTextFixture({ value }: Readonly<{ value: string }>) {
+  return <p>{value}</p>;
+}

tests/fixtures/security/forbidden/raw-html.tsx

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+export function UnsafeHtmlFixture({ value }: Readonly<{ value: string }>) {
+  return <div dangerouslySetInnerHTML={{ __html: value }} />;
+}

tests/fixtures/typecheck/invalid-port-implementation.ts

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+interface ClockPort {
+  now(): number;
+}
+
+export const invalidClock: ClockPort = {
+  now: () => "not-a-number",
+};

tests/fixtures/typecheck/invalid-result-narrowing.ts

@@ -0,0 +1,7 @@
+type Result<T, E> =
+  | Readonly<{ ok: true; value: T }>
+  | Readonly<{ ok: false; error: E }>;
+
+export function invalidUnwrap(result: Result<number, string>): number {
+  return result.value;
+}