feat(i18n): 附件删除按钮国际化

- 调整 prompt-input 附件删除按钮样式，默认隐藏，hover 时显示

frontend/src/components/ai-elements/message.tsx

@@ -8,6 +8,7 @@ import {
   TooltipProvider,
   TooltipTrigger,
 } from "@/components/ui/tooltip";
+import { useI18n } from "@/core/i18n/hooks";
 import { cn } from "@/lib/utils";
 import type { FileUIPart, UIMessage } from "ai";
 import {
@@ -333,6 +334,7 @@ export function MessageAttachment({
   onRemove,
   ...props
 }: MessageAttachmentProps) {
+  const { t } = useI18n();
   const filename = data.filename || "";
   const mediaType =
     data.mediaType?.startsWith("image/") && data.url ? "image" : "file";
@@ -358,7 +360,7 @@ export function MessageAttachment({
           />
           {onRemove && (
             <Button
-              aria-label="Remove attachment"
+              aria-label={t.common.removeAttachment}
               className="bg-background/80 hover:bg-background absolute top-2 right-2 size-6 rounded-full p-0 opacity-0 backdrop-blur-sm transition-opacity group-hover:opacity-100 [&>svg]:size-3"
               onClick={(e) => {
                 e.stopPropagation();
@@ -368,7 +370,7 @@ export function MessageAttachment({
               variant="ghost"
             >
               <XIcon />
-              <span className="sr-only">Remove</span>
+              <span className="sr-only">{t.common.removeAttachment}</span>
             </Button>
           )}
         </>
@@ -386,7 +388,7 @@ export function MessageAttachment({
           </Tooltip>
           {onRemove && (
             <Button
-              aria-label="Remove attachment"
+              aria-label={t.common.removeAttachment}
               className="hover:bg-accent size-6 shrink-0 rounded-full p-0 opacity-0 transition-opacity group-hover:opacity-100 [&>svg]:size-3"
               onClick={(e) => {
                 e.stopPropagation();
@@ -396,6 +398,7 @@ export function MessageAttachment({
               variant="ghost"
             >
               <XIcon />
+              <span className="sr-only">{t.common.removeAttachment}</span>
               <span className="sr-only">Remove</span>
             </Button>
           )}

frontend/src/components/ai-elements/prompt-input.tsx

@@ -290,6 +290,7 @@ export function PromptInputAttachment({
   ...props
 }: PromptInputAttachmentProps) {
   const attachments = usePromptInputAttachments();
+  const { t } = useI18n();
 
   const filename = data.filename || "";
 
@@ -348,7 +349,7 @@ export function PromptInputAttachment({
             </svg>
             {/* 删除按钮 - 右上角 */}
             <button
-              aria-label="Remove attachment"
+              aria-label={t.common.removeAttachment}
               className="absolute top-1.5 right-1.5 z-10 flex size-4 cursor-pointer items-center justify-center rounded-sm transition-colors hover:bg-white/20"
               onClick={(e) => {
                 e.stopPropagation();
@@ -389,8 +390,8 @@ export function PromptInputAttachment({
           </div>
           {/* 关闭按钮 - 右上角 */}
           <button
-            aria-label="Remove attachment"
-            className="absolute top-1 right-1 z-10 flex size-5 cursor-pointer items-center justify-center rounded bg-white/90 transition-colors hover:bg-white dark:bg-gray-800/90 dark:hover:bg-gray-800"
+            aria-label={t.common.removeAttachment}
+            className="absolute top-1 right-1 z-10 flex size-5 cursor-pointer items-center justify-center rounded bg-white/90 opacity-0 transition-opacity hover:bg-white group-hover:opacity-100 dark:bg-gray-800/90 dark:hover:bg-gray-800"
             onClick={(e) => {
               e.stopPropagation();
               attachments.remove(data.id);

frontend/src/core/i18n/locales/en-US.ts

@@ -48,6 +48,7 @@ export const enUS: Translations = {
     save: "Save",
     install: "Install",
     create: "Create",
+    removeAttachment: "Remove attachment",
   },
 
   // Welcome

frontend/src/core/i18n/locales/types.ts

@@ -37,6 +37,7 @@ export interface Translations {
     save: string;
     install: string;
     create: string;
+    removeAttachment: string;
   };
 
   // Welcome

frontend/src/core/i18n/locales/zh-CN.ts

@@ -48,6 +48,7 @@ export const zhCN: Translations = {
     save: "保存",
     install: "安装",
     create: "创建",
+    removeAttachment: "移除附件",
   },
 
   // Welcome