Complete XYZAC LinuxCNC WASM parity and smooth 3D preview

web/worker/xyzac-command-ledger.mjs

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+import { OperationLedger, LEDGER_SCHEMA, LEDGER_PHASES } from "./operation-ledger.mjs";
+import { fnv1a64 } from "./replay.mjs";
+
+export const XYZAC_COMMAND_LEDGER_SCHEMA = "xyzac-command-ledger.v1";
+const TERMINAL_PHASES = new Set(["committed", "aborted", "failed"]);
+
+export class XyzacCommandLedger extends OperationLedger {
+  constructor(entries = []) {
+    super(entries);
+    this.scope = "selected_xyzac_simulation";
+  }
+
+  prepare(input) {
+    if (["HELLO", "CAPABILITIES", "SNAPSHOT_REQUEST", "CANCEL"].includes(input?.kind)) return { status: "untracked", replay: false, entry: null };
+    const result = super.prepare(input);
+    if (result.entry) {
+      result.entry.scope = this.scope;
+      result.entry.intent_hash = result.entry.intent_hash ?? fnv1a64({ kind: input.kind, payload: input.payload ?? {}, operation_id: input.operation_id });
+    }
+    return result;
+  }
+
+  acknowledge(operationId, response) {
+    return this.verify(operationId, response);
+  }
+
+  result(operationId, response, seq) {
+    this.acknowledge(operationId, response);
+    return this.commit(operationId, seq);
+  }
+
+  pending() {
+    return [...this.entries.values()]
+      .filter((entry) => !TERMINAL_PHASES.has(entry.phase))
+      .sort((left, right) => left.seq - right.seq)
+      .map((entry) => structuredClone(entry));
+  }
+
+  reconcileAll() {
+    return this.pending().map((entry) => ({ operation_id: entry.operation_id, status: entry.phase, entry }));
+  }
+
+  timeoutReconcile(operationId) {
+    const reconciliation = this.reconcile(operationId);
+    return { status: "reconcile_required", operation_id: operationId, retry_allowed: false, reconciliation };
+  }
+
+  audit() {
+    const exported = super.export();
+    const pending = this.pending();
+    const unsigned = { schema: XYZAC_COMMAND_LEDGER_SCHEMA, operation_schema: LEDGER_SCHEMA, phases: [...LEDGER_PHASES], scope: this.scope, entries: exported.entries, pending_count: pending.length };
+    return { ...unsigned, state_hash: fnv1a64(unsigned) };
+  }
+}