feat: 添加文件上传功能，集成 S3 上传，优化上传进度显示和错误处理

src/locales/en-US.json

@@ -385,6 +385,13 @@
     "yesterday": "Yesterday",
     "items": "items"
   },
+  "fileUpload": {
+    "uploadFile": "Upload File",
+    "files": "files",
+    "maxFilesError": "Maximum {max} files allowed",
+    "fileSizeError": "File {name} exceeds {max}MB limit",
+    "uploadError": "File {name} upload failed"
+  },
   "auth": {
     "login": {
       "title": "Log in",