feat: 类型帖互动、积分经济与发帖体验

补齐问答采纳/重开、投票匿名与有票禁编、悬赏过期退回、抽奖回帖开奖，并接入积分账本与发帖附件可见性。

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

frontend/app/admin/appearance/AppearanceAdmin.tsx

@@ -121,7 +121,7 @@ export default function AppearanceAdmin({ initialAccent }: { initialAccent: stri
                   cursor: "pointer",
                 }}
                 aria-pressed={active}
-                title={isDefault ? `${p.name}（默认）` : p.name}
+                data-tip={isDefault ? `${p.name}（默认）` : p.name}
               >
                 <span className="relative flex items-center justify-center">
                   {/* 上半圆=浅色模式，下半圆=暗色模式 */}
@@ -163,7 +163,7 @@ export default function AppearanceAdmin({ initialAccent }: { initialAccent: stri
           <label
             className="relative w-12 h-12 rounded-[var(--r-sm)] overflow-hidden border cursor-pointer shrink-0"
             style={{ borderColor: "var(--line-2)" }}
-            title="打开取色器"
+            data-tip="打开取色器"
           >
             <input
               type="color"