Implement AXIS parity UI and execution baseline

web/react/src/legacy.d.ts

@@ -0,0 +1,8 @@
+declare module "*.mjs" {
+  export const SIM_CASE_CATALOG: Array<{ path: string; label?: string; category?: string; status?: string }>;
+  export function loadSimulationCase(options: { path: string }): Promise<{ status: string; entrypoint: string; files: Record<string, string>; missing: string[]; fetched: string[]; state_hash: string; halManifest: unknown[] }>;
+  export function toWorkerConfiguration(bundle: unknown): Record<string, unknown>;
+  export class SimSession { contextId: string; sessionId: string; constructor(core: unknown); accept(message: unknown): unknown; }
+}
+
+declare module "*.js" { const createModule: (options?: unknown) => Promise<unknown>; export default createModule; }