feat: integrate Pi backend and Pi Web

pi-web/lib/session-path.test.mjs

@@ -0,0 +1,24 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+
+async function loadSubject() {
+  return import("./session-path.ts");
+}
+
+test("normalizes Windows separators and casing for session identity", async () => {
+  const { sessionPathKey } = await loadSubject();
+
+  assert.equal(
+    sessionPathKey("C:\\Users\\Alex\\.pi\\sessions\\Parent.jsonl", "win32"),
+    sessionPathKey("c:/Users/Alex/.pi/sessions/parent.jsonl", "win32"),
+  );
+});
+
+test("preserves case when session paths are case-sensitive", async () => {
+  const { sessionPathKey } = await loadSubject();
+
+  assert.notEqual(
+    sessionPathKey("/var/lib/pi/Parent.jsonl", "linux"),
+    sessionPathKey("/var/lib/pi/parent.jsonl", "linux"),
+  );
+});