feat: integrate Pi backend and Pi Web

pi-web/lib/file-fuzzy.test.mjs

@@ -0,0 +1,29 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+
+async function loadSubject() {
+  return import("./file-fuzzy.ts");
+}
+
+test("builds closed file mentions and quotes paths containing spaces", async () => {
+  const { buildAtMentionText, buildFileAtMentionsText } = await loadSubject();
+
+  assert.equal(buildAtMentionText("notes/todo.md", false), "@notes/todo.md ");
+  assert.equal(buildAtMentionText("project files/design brief.md", false), "@\"project files/design brief.md\" ");
+  assert.equal(
+    buildFileAtMentionsText(["notes/todo.md", "project files/design brief.md"]),
+    "@notes/todo.md @\"project files/design brief.md\" ",
+  );
+});
+
+test("builds line-scoped file mentions", async () => {
+  const { buildFileLineMentionText } = await loadSubject();
+
+  assert.equal(buildFileLineMentionText("src/app.ts", 12, 12), "@src/app.ts:12 ");
+  assert.equal(buildFileLineMentionText("src/app.ts", 18, 12), "@src/app.ts:12-18 ");
+  assert.equal(
+    buildFileLineMentionText("project files/app.ts", 3, 9),
+    "@\"project files/app.ts\":3-9 ",
+  );
+  assert.equal(buildFileLineMentionText("src/app.ts", 0, 0), "@src/app.ts:1 ");
+});