fix: omit long file names (#608)

### What problem does this PR solve?

#607
fix: omit long file names
fix: change the parsing method from tag to select
fix: replace icon for new chat
fix: change the OK button text of the Chat Bot API modal to close


### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

web/src/components/chunk-method-modal/index.less

@@ -8,3 +8,7 @@
   cursor: help;
   writing-mode: horizontal-tb;
 }
+
+.chunkMethod {
+  margin-bottom: 0;
+}