diff --git a/Dockerfile b/Dockerfile
index 42bbb8a..cab9937 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,6 +6,7 @@ WORKDIR /workspace
 
 COPY pom.xml ./pom.xml
 COPY common ./common
+COPY im-sdk ./im-sdk
 COPY tenant-service ./tenant-service
 COPY im-service ./im-service
 COPY push-service ./push-service
diff --git a/file-service/src/main/java/com/xuqm/file/service/FileStorageService.java b/file-service/src/main/java/com/xuqm/file/service/FileStorageService.java
index 43404ed..489c3b6 100644
--- a/file-service/src/main/java/com/xuqm/file/service/FileStorageService.java
+++ b/file-service/src/main/java/com/xuqm/file/service/FileStorageService.java
@@ -76,9 +76,15 @@ public class FileStorageService {
         Optional<FileEntity> existing = fileRepository.findByHash(hash);
         if (existing.isPresent()) {
             FileEntity entity = existing.get();
-            entity.setLastAccessedAt(Instant.now());
-            fileRepository.save(entity);
-            return toUploadResult(entity);
+            // 检查磁盘文件是否仍然存在，若不存在则重新写入
+            if (Files.exists(Paths.get(entity.getStoragePath()))) {
+                entity.setLastAccessedAt(Instant.now());
+                fileRepository.save(entity);
+                return toUploadResult(entity);
+            }
+            // 文件记录存在但磁盘文件已丢失，删除旧记录后重新上传
+            fileRepository.delete(entity);
+            fileRepository.flush();
         }
 
         String ext = resolveExtension(originalName, mimeType);
diff --git a/im-sdk/src/main/java/com/xuqm/im/sdk/XuqmImServerSdk.java b/im-sdk/src/main/java/com/xuqm/im/sdk/XuqmImServerSdk.java
index 1c1d02c..ff50f50 100644
--- a/im-sdk/src/main/java/com/xuqm/im/sdk/XuqmImServerSdk.java
+++ b/im-sdk/src/main/java/com/xuqm/im/sdk/XuqmImServerSdk.java
@@ -50,7 +50,7 @@ public final class XuqmImServerSdk {
         this.objectMapper = new ObjectMapper()
                 .registerModule(new JavaTimeModule())
                 .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
-        this.baseUrl = trimTrailingSlash(Objects.requireNonNull(builder.baseUrl, "baseUrl"));
+        this.baseUrl = trimTrailingSlash(builder.baseUrl);
         this.pushBaseUrl = trimTrailingSlash(builder.pushBaseUrl == null ? builder.baseUrl : builder.pushBaseUrl);
         this.updateBaseUrl = trimTrailingSlash(builder.updateBaseUrl == null ? builder.baseUrl : builder.updateBaseUrl);
         this.appId = Objects.requireNonNull(builder.appId, "appId");
@@ -1735,8 +1735,10 @@ public final class XuqmImServerSdk {
         return value.endsWith("/") ? value.substring(0, value.length() - 1) : value;
     }
 
+    private static final String DEFAULT_BASE_URL = "https://dev.xuqinmin.com";
+
     public static final class Builder {
-        private String baseUrl;
+        private String baseUrl = DEFAULT_BASE_URL;
         private String pushBaseUrl;
         private String updateBaseUrl;
         private String appId;
@@ -1776,6 +1778,8 @@ public final class XuqmImServerSdk {
         }
 
         public XuqmImServerSdk build() {
+            Objects.requireNonNull(this.appId, "appId is required");
+            Objects.requireNonNull(this.appSecret, "appSecret is required");
             return new XuqmImServerSdk(this);
         }
     }
diff --git a/update-service/src/main/java/com/xuqm/update/service/UpdateAssetService.java b/update-service/src/main/java/com/xuqm/update/service/UpdateAssetService.java
index db4f28e..0fea549 100644
--- a/update-service/src/main/java/com/xuqm/update/service/UpdateAssetService.java
+++ b/update-service/src/main/java/com/xuqm/update/service/UpdateAssetService.java
@@ -50,6 +50,9 @@ public class UpdateAssetService {
     @Value("${update.base-url:https://update.dev.xuqinmin.com}")
     private String baseUrl;
 
+    @Value("${file.service.internal-url:http://127.0.0.1:8086}")
+    private String fileServiceInternalUrl;
+
     public UpdateAssetService(ObjectMapper objectMapper) {
         this.objectMapper = objectMapper;
     }
@@ -180,9 +183,31 @@ public class UpdateAssetService {
         if (normalized.endsWith(".ipa")) {
             return inspectIpa(file, fileName);
         }
+        // 文件名无后缀时，按文件魔数尝试解析（APK/IPA 本质都是 ZIP）
+        if (isZipFile(file)) {
+            try {
+                return inspectApk(file, fileName);
+            } catch (Exception ignored) {
+            }
+            try {
+                return inspectIpa(file, fileName);
+            } catch (Exception ignored) {
+            }
+        }
         return new AppPackageInspectResult(platformFromFileName(fileName), null, null, null, fileName, false);
     }
 
+    private boolean isZipFile(Path file) throws IOException {
+        if (!Files.exists(file) || Files.size(file) < 4) {
+            return false;
+        }
+        try (InputStream in = Files.newInputStream(file)) {
+            byte[] magic = new byte[4];
+            int read = in.read(magic);
+            return read == 4 && magic[0] == 0x50 && magic[1] == 0x4B && magic[2] == 0x03 && magic[3] == 0x04;
+        }
+    }
+
     private AppPackageInspectResult inspectIpa(Path file, String fileName) throws Exception {
         try (ZipFile zipFile = new ZipFile(file.toFile())) {
             ZipEntry entry = zipFile.stream()
@@ -338,9 +363,14 @@ public class UpdateAssetService {
     }
 
     private RemotePackage downloadRemotePackage(String packageUrl, boolean tempFile) throws IOException {
-        HttpURLConnection connection = (HttpURLConnection) new URL(packageUrl).openConnection();
+        // 同一台服务器上的 file-service 使用内部地址，避免 Nginx HTTPS 代理的性能损耗
+        String internalUrl = packageUrl;
+        if (packageUrl != null && packageUrl.contains("file.dev.xuqinmin.com")) {
+            internalUrl = packageUrl.replace("https://file.dev.xuqinmin.com", fileServiceInternalUrl);
+        }
+        HttpURLConnection connection = (HttpURLConnection) new URL(internalUrl).openConnection();
         connection.setConnectTimeout(15_000);
-        connection.setReadTimeout(30_000);
+        connection.setReadTimeout(300_000);
         connection.setInstanceFollowRedirects(true);
 
         int status = connection.getResponseCode();