feat: integrate Pi backend and Pi Web

pi-web/lib/git-changes.test.mjs

@@ -0,0 +1,52 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+
+async function loadSubject() {
+  return import("./git-status.ts");
+}
+
+test("parses null-delimited Git status entries including renames", async () => {
+  const { parseGitPorcelainV1 } = await loadSubject();
+  const entries = parseGitPorcelainV1([
+    " M components/App.tsx",
+    "?? notes.txt",
+    "R  src/new-name.ts",
+    "src/old-name.ts",
+    "",
+  ].join("\0"));
+
+  assert.deepEqual(entries, [
+    {
+      path: "components/App.tsx",
+      indexStatus: " ",
+      worktreeStatus: "M",
+    },
+    {
+      path: "notes.txt",
+      indexStatus: "?",
+      worktreeStatus: "?",
+    },
+    {
+      path: "src/new-name.ts",
+      originalPath: "src/old-name.ts",
+      indexStatus: "R",
+      worktreeStatus: " ",
+    },
+  ]);
+});
+
+test("classifies Git status for explorer badges", async () => {
+  const { classifyGitStatus } = await loadSubject();
+  const classify = (pair) => classifyGitStatus({
+    path: "file.ts",
+    indexStatus: pair[0],
+    worktreeStatus: pair[1],
+  });
+
+  assert.deepEqual(classify(" M"), { status: "modified", code: "M" });
+  assert.deepEqual(classify("??"), { status: "untracked", code: "U" });
+  assert.deepEqual(classify("A "), { status: "added", code: "A" });
+  assert.deepEqual(classify("R "), { status: "renamed", code: "R" });
+  assert.deepEqual(classify("UU"), { status: "conflict", code: "C" });
+  assert.deepEqual(classify(" D"), { status: "deleted", code: "D" });
+});