feat(feedback): 新增用户反馈提交、分页列表与语音描述

支持 Bug/需求提交、截图与聊天同款语音输入，全站反馈分页浏览与详情页，并从聊天与空间页提供入口。

Co-authored-by: Cursor <cursoragent@cursor.com>

src/utils/feedbackLabels.ts

@@ -0,0 +1,28 @@
+import type { FeedbackSubmission, FeedbackSubmissionType } from '../types';
+
+export const FEEDBACK_TYPE_LABELS: Record<FeedbackSubmissionType, string> = {
+  bug: 'Bug',
+  feature: '需求',
+  other: '其他',
+};
+
+export const FEEDBACK_STATUS_LABELS: Record<FeedbackSubmission['status'], string> = {
+  pending: '待处理',
+  reviewing: '处理中',
+  resolved: '已解决',
+  closed: '已关闭',
+};
+
+export function formatFeedbackTime(timestamp: number) {
+  return new Date(timestamp).toLocaleString('zh-CN', {
+    year: 'numeric',
+    month: '2-digit',
+    day: '2-digit',
+    hour: '2-digit',
+    minute: '2-digit',
+  });
+}
+
+export function feedbackImageDataUrl(image: { mimeType: string; dataBase64: string }) {
+  return `data:${image.mimeType || 'image/jpeg'};base64,${image.dataBase64}`;
+}