🚑 fix: safeguard `NewAPIError.Error()` against nil pointer panic

Backend
• `types/error.go`
  – Return empty string when receiver itself is `nil`.
  – If `Err` is `nil`, fall back to `errorCode` string to avoid calling `nil.Error()`.

This prevents runtime panics when the error handler builds an OpenAI-style error response but the underlying `Err` field has not been set.

types/error.go

@@ -88,6 +88,13 @@ func (e *NewAPIError) GetErrorCode() ErrorCode {
 }
 
 func (e *NewAPIError) Error() string {
+	if e == nil {
+		return ""
+	}
+	if e.Err == nil {
+		// fallback message when underlying error is missing
+		return string(e.errorCode)
+	}
 	return e.Err.Error()
 }
 

web/src/components/table/ChannelsTable.js

@@ -42,7 +42,7 @@ import {
   IconTreeTriangleDown,
   IconSearch,
   IconMore,
-  IconList, IconDescend2
+  IconDescend2
 } from '@douyinfe/semi-icons';
 import { loadChannelModels, isMobile, copy } from '../../helpers';
 import EditTagModal from '../../pages/Channel/EditTagModal.js';
@@ -630,7 +630,7 @@ const ChannelsTable = () => {
                   >
                     <Button
                       theme='light'
-                      type='secondary'
+                      type='tertiary'
                       size="small"
                       icon={<IconTreeTriangleDown />}
                     />

web/src/components/table/LogsTable.js

@@ -410,7 +410,7 @@ const LogsTable = () => {
         return isAdminUser ? (
           <div>
             <Avatar
-              size='small'
+              size='extra-small'
               color={stringToColor(text)}
               style={{ marginRight: 4 }}
               onClick={(event) => {