split: deterministic-tests, obsidian-plugin, local-cli, test-client, frontend root

New deterministic-tests workspace: scripted multi-client harness against
a real server (~110 scenario tests, server-control, managed-websocket,
test-runner). Updates to existing workspaces: obsidian-plugin (settings,
cursors, plugin entrypoint), local-client-cli (args, cli, file-watcher,
node-filesystem, path-utils + tests), test-client (mock-agent/client,
cli, error tracker). Bumps frontend root package.json/lock and adds
eslint config tweaks.

frontend/deterministic-tests/src/tests/19-move-chain-three-files.test.ts

@@ -0,0 +1,42 @@
+import type { AssertableState } from "../utils/assertable-state";
+import type { TestDefinition } from "../test-definition";
+
+export const moveChainThreeFilesTest: TestDefinition = {
+    description:
+        "Three files have their contents rotated (A gets C's content, B gets A's, C gets B's) " +
+        "while offline. After reconnecting, both clients should converge with the rotated contents.",
+    clients: 2,
+    steps: [
+        { type: "enable-sync", client: 0 },
+        { type: "enable-sync", client: 1 },
+
+        { type: "create", client: 0, path: "A.md", content: "was A" },
+        { type: "create", client: 0, path: "B.md", content: "was B" },
+        { type: "create", client: 0, path: "C.md", content: "was C" },
+        { type: "barrier" },
+
+        { type: "disable-sync", client: 0 },
+
+        { type: "delete", client: 0, path: "A.md" },
+        { type: "delete", client: 0, path: "B.md" },
+        { type: "delete", client: 0, path: "C.md" },
+
+        { type: "create", client: 0, path: "A.md", content: "was C" },
+        { type: "create", client: 0, path: "B.md", content: "was A" },
+        { type: "create", client: 0, path: "C.md", content: "was B" },
+
+        { type: "enable-sync", client: 0 },
+        { type: "barrier" },
+
+        {
+            type: "assert-consistent",
+            verify: (state: AssertableState): void => {
+                state
+                    .assertFileCount(3)
+                    .assertContent("A.md", "was C")
+                    .assertContent("B.md", "was A")
+                    .assertContent("C.md", "was B");
+            }
+        }
+    ]
+};