Add circuit reorder history

tests/project-command.model.test.ts

@@ -29,6 +29,10 @@ import {
   createCircuitDeleteProjectCommand,
   createCircuitInsertProjectCommand,
 } from "../src/domain/models/circuit-structure-project-command.model.js";
+import {
+  assertCircuitSectionReorderProjectCommand,
+  createCircuitSectionReorderProjectCommand,
+} from "../src/domain/models/circuit-section-reorder-project-command.model.js";
 
 describe("serialized project commands", () => {
   it("round-trips a versioned command envelope", () => {
@@ -519,3 +523,61 @@ describe("circuit structure project commands", () => {
     );
   });
 });
+
+describe("circuit section reorder project commands", () => {
+  it("captures every expected and target sort position", () => {
+    const command = createCircuitSectionReorderProjectCommand(
+      "section-1",
+      [
+        {
+          circuitId: "circuit-1",
+          expectedSortOrder: 10,
+          targetSortOrder: 20,
+        },
+        {
+          circuitId: "circuit-2",
+          expectedSortOrder: 20,
+          targetSortOrder: 10,
+        },
+      ]
+    );
+    assert.equal(command.payload.assignments.length, 2);
+    assert.doesNotThrow(() =>
+      assertCircuitSectionReorderProjectCommand(command)
+    );
+  });
+
+  it("rejects empty, duplicate and complete no-op assignments", () => {
+    assert.throws(
+      () => createCircuitSectionReorderProjectCommand("", []),
+      /sectionId/
+    );
+    assert.throws(
+      () =>
+        createCircuitSectionReorderProjectCommand("section-1", [
+          {
+            circuitId: "circuit-1",
+            expectedSortOrder: 10,
+            targetSortOrder: 20,
+          },
+          {
+            circuitId: "circuit-1",
+            expectedSortOrder: 20,
+            targetSortOrder: 10,
+          },
+        ]),
+      /duplicate circuit ids/
+    );
+    assert.throws(
+      () =>
+        createCircuitSectionReorderProjectCommand("section-1", [
+          {
+            circuitId: "circuit-1",
+            expectedSortOrder: 10,
+            targetSortOrder: 10,
+          },
+        ]),
+      /change at least one position/
+    );
+  });
+});