Fix: Switch the default theme from light mode to dark mode and improve some styles #9869 (#10552)

### What problem does this PR solve?

Fix: Switch the default theme from light mode to dark mode and improve
some styles #9869
-Update UI component styles such as input boxes, tables, and prompt
boxes
-Optimize login page layout and style details
-Revise some of the wording, such as uniformly changing "data flow" to
"pipeline"
-Adjust the parser to support the markdown type

### Type of change

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

web/src/pages/dataset/dataset-setting/configuration/common-item.tsx

@@ -100,6 +100,7 @@ export function EmbeddingModelItem({ line = 1, isEdit = true }: IProps) {
                     options={embeddingModelOptions}
                     disabled={isEdit ? disabled : false}
                     placeholder={t('embeddingModelPlaceholder')}
+                    triggerClassName="!bg-bg-base"
                   />
                 </FormControl>
               </div>