fix(desktop): resolve sandboxed WeChat share paths

apps/desktop/src/main/wechat-share-import.mjs

@@ -31,11 +31,21 @@ const incomingDirectory = (downloadsPath) => join(downloadsPath, WECHAT_INCOMING
 
 const assertIncomingZip = async (filePath, downloadsPath) => {
   const root = incomingDirectory(downloadsPath);
-  if (!isPathInsideDirectory(filePath, root) || !filePath.toLowerCase().endsWith(".zip")) {
+  if (!filePath.toLowerCase().endsWith(".zip")) {
+    throw new WeChatArchiveError("rejected-path");
+  }
+  let realRoot;
+  let realFile;
+  try {
+    [realRoot, realFile] = await Promise.all([realpath(root), realpath(filePath)]);
+  } catch {
+    throw new WeChatArchiveError("rejected-path");
+  }
+  // The sandboxed share extension may name ~/Downloads through its container
+  // symlink. Validate the resolved file against the resolved incoming directory.
+  if (!isPathInsideDirectory(realFile, realRoot) || !realFile.toLowerCase().endsWith(".zip")) {
     throw new WeChatArchiveError("rejected-path");
   }
-  const [realRoot, realFile] = await Promise.all([realpath(root), realpath(filePath)]);
-  if (!isPathInsideDirectory(realFile, realRoot)) throw new WeChatArchiveError("rejected-path");
   return realFile;
 };
 
@@ -107,15 +117,16 @@ export const createWeChatShareController = ({
 
   const importFromProtocolUrl = async (value) => {
     const requestedPath = wechatImportFilePath(value);
-    if (!requestedPath || inFlightPaths.has(requestedPath) || preparedPaths.has(requestedPath)
-      || completedPaths.has(requestedPath) || failedPaths.has(requestedPath)) return;
-    inFlightPaths.add(requestedPath);
-    onActivity();
+    if (!requestedPath) return;
     const downloads = downloadsPath();
     let zipPath = null;
     let preparedDirectory = null;
     try {
       zipPath = await assertIncomingZip(requestedPath, downloads);
+      if (inFlightPaths.has(zipPath) || preparedPaths.has(zipPath)
+        || completedPaths.has(zipPath) || failedPaths.has(zipPath)) return;
+      inFlightPaths.add(zipPath);
+      onActivity();
       const archive = await readFile(zipPath);
       const note = wechatChatNoteFromArchive(archive, basename(zipPath));
       const importId = randomUUID();
@@ -148,22 +159,21 @@ export const createWeChatShareController = ({
         media: listed,
       };
       sessions.set(importId, { directory, media, zipPath, payload, failed: false });
-      preparedPaths.add(requestedPath);
+      preparedPaths.add(zipPath);
       preparedDirectory = null;
       sendToRenderer(payload);
       void writeDiagnostic("wechat-import.prepared", { media: listed.length, bytes: archive.length });
     } catch (error) {
       if (preparedDirectory) await rm(preparedDirectory, { recursive: true, force: true }).catch(() => {});
       const reason = error instanceof WeChatArchiveError ? error.code : "failed";
-      failedPaths.add(requestedPath);
-      // A stale or malformed protocol URL may arrive before the incoming-folder
-      // scan finds the actual share. It is not a failed save attempt.
+      if (zipPath) failedPaths.add(zipPath);
+      // A stale or malformed protocol URL is not a failed save attempt.
       if (reason !== "rejected-path") {
         sendToRenderer({ ok: false, reason: reason === "unrecognized" ? "unrecognized" : "failed" });
       }
       void writeDiagnostic("wechat-import.rejected", { reason });
     } finally {
-      inFlightPaths.delete(requestedPath);
+      if (zipPath) inFlightPaths.delete(zipPath);
     }
   };
 

apps/desktop/src/main/wechat-share-import.test.mjs

@@ -1,5 +1,5 @@
 import { deflateRawSync } from "node:zlib";
-import { mkdir, mkdtemp, readFile, rename, rm, stat, utimes, writeFile } from "node:fs/promises";
+import { mkdir, mkdtemp, readFile, rename, rm, stat, symlink, utimes, writeFile } from "node:fs/promises";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
 import { afterEach, describe, expect, test } from "bun:test";
@@ -133,6 +133,57 @@ describe("WeChat share handoff", () => {
     expect((await readFile(outside)).toString()).toBe("secret");
   });
 
+  test("accepts the share extension's sandbox Downloads alias without a duplicate scan", async () => {
+    const root = await mkdtemp(join(tmpdir(), "edgeever-wechat-share-"));
+    roots.push(root);
+    const downloads = join(root, "Downloads");
+    const batch = join(downloads, WECHAT_INCOMING_DIRECTORY_NAME, "batch");
+    await mkdir(batch, { recursive: true });
+    const zipPath = join(batch, "聊天记录.zip");
+    await writeFile(zipPath, zipOf("聊天记录.txt", "·鱼\n2026年9月22日 22:15\n你好\n", "附件/readme.txt", "hello"));
+    const sandboxData = join(root, "Library", "Containers", "share", "Data");
+    await mkdir(sandboxData, { recursive: true });
+    await symlink(downloads, join(sandboxData, "Downloads"));
+    const sandboxPath = join(sandboxData, "Downloads", WECHAT_INCOMING_DIRECTORY_NAME, "batch", "聊天记录.zip");
+    const sent = [];
+    const diagnostics = [];
+    const controller = createWeChatShareController({
+      downloadsPath: () => downloads,
+      tempPath: () => join(root, "temp"),
+      sendToRenderer: (payload) => sent.push(payload),
+      writeDiagnostic: (event) => diagnostics.push(event),
+    });
+    await controller.importFromProtocolUrl(`edgeever://wechat-import?path=${encodeURIComponent(sandboxPath)}`);
+    expect(sent).toHaveLength(1);
+    expect(sent[0].ok).toBe(true);
+    expect(diagnostics).not.toContain("wechat-import.rejected");
+    await controller.importPending();
+    expect(sent).toHaveLength(1);
+    await controller.finish(sent[0].importId, true);
+    await expect(stat(zipPath)).rejects.toThrow();
+  });
+
+  test("rejects a link in the incoming folder that resolves outside it", async () => {
+    const root = await mkdtemp(join(tmpdir(), "edgeever-wechat-share-"));
+    roots.push(root);
+    const downloads = join(root, "Downloads");
+    const batch = join(downloads, WECHAT_INCOMING_DIRECTORY_NAME, "batch");
+    await mkdir(batch, { recursive: true });
+    const outside = join(root, "secret.zip");
+    await writeFile(outside, zipOf("聊天记录.txt", "·鱼\n2026年9月22日 22:15\n你好\n", "附件/readme.txt", "hello"));
+    const linked = join(batch, "linked.zip");
+    await symlink(outside, linked);
+    const sent = [];
+    const controller = createWeChatShareController({
+      downloadsPath: () => downloads,
+      tempPath: () => join(root, "temp"),
+      sendToRenderer: (payload) => sent.push(payload),
+    });
+    await controller.importFromProtocolUrl(`edgeever://wechat-import?path=${encodeURIComponent(linked)}`);
+    expect(sent).toHaveLength(0);
+    expect((await stat(outside)).isFile()).toBe(true);
+  });
+
   test("a rejected protocol path does not report failure before a valid share is scanned", async () => {
     const root = await mkdtemp(join(tmpdir(), "edgeever-wechat-share-"));
     roots.push(root);