docs: 更新协议文档，删除废弃计划文档

- 更新 http-error-codes, user-points-chat-data-protocol
- 更新 divination-run-protocol, profile-protocol
- 删除废弃的后端和前端设计计划文档

apps/lib/shared/widgets/divination/divination_terms.dart

@@ -1,4 +1,5 @@
 import '../../../features/divination/data/models/divination_params.dart';
+import '../../../l10n/app_localizations.dart';
 
 abstract final class DivinationTerms {
   static const yaoNames = ['初爻', '二爻', '三爻', '四爻', '五爻', '上爻'];
@@ -45,6 +46,32 @@ abstract final class DivinationTerms {
   static const yaoXiang = '爻象';
   static const qiGua = '起卦';
   static const jieGua = '解卦';
+
+  static String yaoName(AppLocalizations l10n, int index) {
+    return switch (index) {
+      0 => l10n.yaoNameFirst,
+      1 => l10n.yaoNameSecond,
+      2 => l10n.yaoNameThird,
+      3 => l10n.yaoNameFourth,
+      4 => l10n.yaoNameFifth,
+      5 => l10n.yaoNameTop,
+      _ => '',
+    };
+  }
+
+  static String yinYangLabel(AppLocalizations l10n, bool isYang) {
+    return isYang ? l10n.yaoYang : l10n.yaoYin;
+  }
+
+  static String yaoTypeLabel(AppLocalizations l10n, YaoType type) {
+    return switch (type) {
+      YaoType.youngYang => l10n.yaoYoungYang,
+      YaoType.youngYin => l10n.yaoYoungYin,
+      YaoType.oldYang => l10n.yaoOldYang,
+      YaoType.oldYin => l10n.yaoOldYin,
+      YaoType.undetermined => '',
+    };
+  }
 }
 
 enum YaoTypeLabel { youngYang, youngYin, oldYang, oldYin }