feat: 帖子分级置顶（板块/全站）与板块管理员置顶权限、消息管理权限调整

frontend/components/PostActions.tsx

@@ -46,7 +46,7 @@ export default function PostActions({
   const [user, setUser] = useState<User | null>(null);
   const [open, setOpen] = useState(false);
   const [deleting, setDeleting] = useState(false);
-  const [isPinned, setIsPinned] = useState(pinned > 0);
+  const [pinLevel, setPinLevel] = useState(pinned);
   const [isRecommended, setIsRecommended] = useState(recommended);
   const [isLocked, setIsLocked] = useState(locked);
   const [acting, setActing] = useState(false);
@@ -89,6 +89,13 @@ export default function PostActions({
   const showEdit = canManage && !(isLocked && !staffUser) && !editTimeLocked;
   const canApprove =
     !!user && status === "pending" && canModerateBoard(user, boardId);
+  // 置顶分级：管理员及以上可设全局置顶(2)与板块置顶(1)；板块管理员只在其授权板块做板块置顶。
+  // 已是全站置顶的帖子，板块管理员不可操作，故不展示入口。
+  const canGlobalPin = isAdmin;
+  const canBoardPin = !!user && canModerateBoard(user, boardId);
+  const showGlobalPin = canGlobalPin;
+  const showBoardPin = canBoardPin && (isAdmin || pinLevel < 2);
+  const showPin = showGlobalPin || showBoardPin;
   // staff 删他人帖：走类型+理由；作者自删：简单确认
   const staffDeletingOther =
     !!user && user.id !== authorId && canStaffSoftDelete(user, boardId, authorRole);
@@ -126,16 +133,24 @@ export default function PostActions({
     }
   };
 
-  const handlePin = async () => {
+  const handlePin = async (level: 1 | 2) => {
     setActing(true);
     setOpen(false);
     try {
-      const res = await apiTogglePin(postId);
-      setIsPinned(res.pinned > 0);
-      toast(res.pinned > 0 ? "已置顶" : "已取消置顶", "ok");
+      // 再次点击当前级别 = 取消置顶
+      const next = pinLevel === level ? 0 : level;
+      const res = await apiTogglePin(postId, next as 0 | 1 | 2);
+      setPinLevel(res.pinned);
+      const okMsg =
+        res.pinned <= 0
+          ? "已取消置顶"
+          : res.pinned === 2
+            ? "已全局置顶"
+            : "已在本板块置顶";
+      toast(okMsg, "ok");
       router.refresh();
-    } catch {
-      toast("操作失败，请稍后重试");
+    } catch (e) {
+      toast(e instanceof Error ? e.message : "操作失败，请稍后重试");
     } finally {
       setActing(false);
     }
@@ -220,25 +235,44 @@ export default function PostActions({
               <div style={{ height: 1, background: "var(--line)" }} />
             </>
           )}
+          {showPin && (
+            <>
+              {showGlobalPin && (
+                <button
+                  type="button"
+                  role="menuitem"
+                  onClick={() => void handlePin(2)}
+                  className={itemCls}
+                  style={pinLevel === 2 ? { color: "var(--pin)" } : { color: "var(--ink)" }}
+                >
+                  <Pin size={14} className="shrink-0" />
+                  <span className="flex-1 text-left">全局置顶</span>
+                  {pinLevel === 2 && <Check size={14} className="shrink-0" />}
+                </button>
+              )}
+              {showBoardPin && (
+                <button
+                  type="button"
+                  role="menuitem"
+                  onClick={() => void handlePin(1)}
+                  className={itemCls}
+                  style={pinLevel === 1 ? { color: "var(--pin)" } : { color: "var(--ink)" }}
+                >
+                  <Pin size={14} className="shrink-0" />
+                  <span className="flex-1 text-left">板块置顶</span>
+                  {pinLevel === 1 && <Check size={14} className="shrink-0" />}
+                </button>
+              )}
+            </>
+          )}
           {isAdmin && (
             <>
-              <button
-                type="button"
-                role="menuitem"
-                onClick={handlePin}
-                className={itemCls}
-                style={isPinned ? { color: "var(--accent)" } : { color: "var(--ink)" }}
-              >
-                <Pin size={14} className="shrink-0" />
-                <span className="flex-1 text-left">{isPinned ? "取消置顶" : "置顶"}</span>
-                {isPinned && <Check size={14} className="shrink-0" />}
-              </button>
               <button
                 type="button"
                 role="menuitem"
                 onClick={handleRecommend}
                 className={itemCls}
-                style={isRecommended ? { color: "var(--gold)" } : { color: "var(--ink)" }}
+                style={isRecommended ? { color: "var(--rec)" } : { color: "var(--ink)" }}
               >
                 <Star size={14} className="shrink-0" />
                 <span className="flex-1 text-left">{isRecommended ? "取消推荐" : "推荐"}</span>