feat(posts): 类型帖截止时间、抽奖奖品表与悬赏发帖体验

统一投票/悬赏/抽奖截止与状态展示，抽奖支持多奖品行；发帖页悬赏积分对齐表格输入，并在余额不足时于底部就地提示。

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

frontend/app/post/[id]/edit/EditPostClient.tsx

@@ -14,6 +14,7 @@ type Props = {
   initialTypeMeta?: string;
   initialAttachments?: PostAttachment[];
   canEditPollOptions?: boolean;
+  canEditLotteryPrizes?: boolean;
   boardName: string;
   boardId: number;
   boardColorIndex?: number;
@@ -30,6 +31,7 @@ export default function EditPostClient({
   initialTypeMeta,
   initialAttachments,
   canEditPollOptions,
+  canEditLotteryPrizes,
   boardName,
   boardId,
   boardColorIndex = 0,
@@ -47,6 +49,7 @@ export default function EditPostClient({
       initialTypeMeta={initialTypeMeta}
       initialAttachments={initialAttachments}
       canEditPollOptions={canEditPollOptions}
+      canEditLotteryPrizes={canEditLotteryPrizes}
       boardName={boardName}
       boardId={boardId}
       boardColorIndex={boardColorIndex}