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/local-client-cli/src/path-utils.ts

@@ -0,0 +1,15 @@
+import * as path from "path";
+
+// Convert a native platform path to forward slashes (no-op on non-Windows)
+export function toUnixPath(nativePath: string): string {
+    return nativePath.split(path.sep).join(path.posix.sep);
+}
+
+// Match a file path against a glob pattern
+// Extends path.matchesGlob so that "dir/**" also matches the directory itself
+export function matchesGlob(filePath: string, pattern: string): boolean {
+    if (pattern.endsWith("/**") && filePath === pattern.slice(0, -3)) {
+        return true;
+    }
+    return path.matchesGlob(filePath, pattern);
+}