Feat: add image table context to pipeline splitter (#12167)

### What problem does this PR solve?

Add image table context to pipeline splitter.

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

web/src/pages/agent/constant/pipeline.tsx

@@ -206,6 +206,7 @@ export const initialSplitterValues = {
   chunk_token_size: 512,
   overlapped_percent: 0,
   delimiters: [{ value: '\n' }],
+  image_table_context_window: 0,
 };
 
 export enum Hierarchy {

web/src/pages/agent/form/splitter-form/index.tsx

@@ -22,6 +22,7 @@ const outputList = buildOutputList(initialSplitterValues.outputs);
 
 export const FormSchema = z.object({
   chunk_token_size: z.number(),
+  image_table_context_window: z.number(),
   delimiters: z.array(
     z.object({
       value: z.string().optional(),
@@ -74,6 +75,13 @@ const SplitterForm = ({ node }: INextOperatorForm) => {
           min={0}
           label={t('flow.overlappedPercent')}
         ></SliderInputFormField>
+        <SliderInputFormField
+          name="image_table_context_window"
+          max={256}
+          min={0}
+          label={t('knowledgeConfiguration.imageTableContextWindow')}
+          tooltip={t('knowledgeConfiguration.imageTableContextWindowTip')}
+        ></SliderInputFormField>
         <section>
           <span className="mb-2 inline-block">{t('flow.delimiters')}</span>
           <div className="space-y-4">

web/src/pages/agent/utils.ts

@@ -289,10 +289,14 @@ function transformParserParams(params: ParserFormSchemaType) {
 }
 
 function transformSplitterParams(params: SplitterFormSchemaType) {
+  const { image_table_context_window, ...rest } = params;
+  const imageTableContextWindow = Number(image_table_context_window || 0);
   return {
-    ...params,
+    ...rest,
     overlapped_percent: Number(params.overlapped_percent) / 100,
     delimiters: transformObjectArrayToPureArray(params.delimiters, 'value'),
+    table_context_size: imageTableContextWindow,
+    image_context_size: imageTableContextWindow,
 
     // Unset children delimiters if this option is not enabled
     children_delimiters: params.enable_children