Add dedicated rename support logging

tests/rename-log.test.ts

@@ -0,0 +1,52 @@
+import fs from "node:fs";
+import os from "node:os";
+import path from "node:path";
+import { afterEach, describe, expect, it } from "vitest";
+import { getRenameLogPath, initRenameLog, logRenameEvent, shutdownRenameLog } from "../src/main/rename-log";
+
+const tempDirs: string[] = [];
+
+afterEach(() => {
+  shutdownRenameLog();
+  for (const dir of tempDirs.splice(0)) {
+    fs.rmSync(dir, { recursive: true, force: true });
+  }
+});
+
+describe("rename-log", () => {
+  it("writes rename events to the rename log", () => {
+    const baseDir = fs.mkdtempSync(path.join(os.tmpdir(), "rd-rlog-"));
+    tempDirs.push(baseDir);
+
+    initRenameLog(baseDir);
+    logRenameEvent("INFO", "Auto-Rename durchgeführt", {
+      packageName: "Test Paket",
+      sourcePath: "C:\\extract\\old.mkv",
+      targetPath: "C:\\extract\\new.mkv"
+    });
+
+    const logPath = getRenameLogPath();
+    expect(logPath).not.toBeNull();
+    expect(fs.existsSync(logPath!)).toBe(true);
+    const content = fs.readFileSync(logPath!, "utf8");
+    expect(content).toContain("Rename-Log Start");
+    expect(content).toContain("Auto-Rename durchgeführt");
+    expect(content).toContain("sourcePath=C:\\extract\\old.mkv");
+  });
+
+  it("rotates oversized rename logs on startup", () => {
+    const baseDir = fs.mkdtempSync(path.join(os.tmpdir(), "rd-rlog-rotate-"));
+    tempDirs.push(baseDir);
+
+    const oversizedPath = path.join(baseDir, "rename.log");
+    fs.mkdirSync(baseDir, { recursive: true });
+    fs.writeFileSync(oversizedPath, "x".repeat(10 * 1024 * 1024 + 256), "utf8");
+
+    initRenameLog(baseDir);
+
+    expect(fs.existsSync(oversizedPath)).toBe(true);
+    expect(fs.existsSync(`${oversizedPath}.old`)).toBe(true);
+    const content = fs.readFileSync(oversizedPath, "utf8");
+    expect(content).toContain("Rename-Log Start");
+  });
+});