feat: import Chinese-localized Buzz source snapshot

Signed-off-by: cls_宁波本机 <908705107@qq.com>

desktop/tests/helpers/fileDrag.ts

@@ -0,0 +1,52 @@
+import type { Page } from "@playwright/test";
+
+/**
+ * Simulate a native file drag entering the window. The backup test flow
+ * listens for window-level dragenter with a "Files" payload and swaps in a
+ * composer-style drop overlay over its host surface.
+ */
+export async function startWindowFileDrag(page: Page): Promise<void> {
+  await page.evaluate(() => {
+    const dataTransfer = new DataTransfer();
+    dataTransfer.items.add(
+      new File(["x"], "identity.ncryptsec", { type: "text/plain" }),
+    );
+    window.dispatchEvent(
+      new DragEvent("dragenter", { dataTransfer, bubbles: true }),
+    );
+  });
+}
+
+/** Simulate the file drag leaving the window without dropping. */
+export async function endWindowFileDrag(page: Page): Promise<void> {
+  await page.evaluate(() => {
+    window.dispatchEvent(new DragEvent("dragend", { bubbles: true }));
+  });
+}
+
+/** Drop a text file with the given contents onto the element with `testId`. */
+export async function dropFileOnTestId(
+  page: Page,
+  testId: string,
+  contents: string,
+  name = "identity.ncryptsec",
+): Promise<void> {
+  await page.evaluate(
+    ({ testId, contents, name }) => {
+      const dataTransfer = new DataTransfer();
+      dataTransfer.items.add(
+        new File([contents], name, { type: "text/plain" }),
+      );
+      const target = document.querySelector(`[data-testid="${testId}"]`);
+      if (!target) throw new Error(`drop target ${testId} not found`);
+      target.dispatchEvent(
+        new DragEvent("drop", {
+          dataTransfer,
+          bubbles: true,
+          cancelable: true,
+        }),
+      );
+    },
+    { testId, contents, name },
+  );
+}