讨论置顶功能，修复setup

hydro/model/builtin.ts

@@ -46,6 +46,7 @@ export const PERM = {
     PERM_VIEW_DISCUSSION: 1n << 27n,
     PERM_CREATE_DISCUSSION: 1n << 28n,
     PERM_HIGHLIGHT_DISCUSSION: 1n << 29n,
+    PERM_PIN_DISCUSSION: 1n << 59n,
     PERM_EDIT_DISCUSSION: 1n << 30n,
     PERM_EDIT_DISCUSSION_SELF: 1n << 31n,
     PERM_DELETE_DISCUSSION: 1n << 32n,
@@ -603,6 +604,20 @@ export const USER_GENDER_ICONS = {
     [USER_GENDER_OTHER]: '?',
 };
 
+export const CONSTANT = {
+    PROBLEM_PER_PAGE: 100,
+    CONTEST_PER_PAGE: 20,
+    DISCUSSION_PER_PAGE: 50,
+    RECORD_PER_PAGE: 100,
+    SOLUTION_PER_PAGE: 20,
+    TRAINING_PER_PAGE: 10,
+    REPLY_PER_PAGE: 50,
+    HOMEWORK_ON_MAIN: 5,
+    DISCUSSION_ON_MAIN: 20,
+    CONTEST_ON_MAIN: 10,
+    TRAINING_ON_MAIN: 10,
+};
+
 global.Hydro.model.builtin = {
     Permission,
     PERM,