Replace hardcoded max tokens with DEFAULT_MAX_TOTAL_TOKENS constant

- Use constant in process_chunks_unified
- Update WebUI default to match (32000)

lightrag/utils.py

@@ -20,6 +20,7 @@ from lightrag.constants import (
     DEFAULT_LOG_BACKUP_COUNT,
     DEFAULT_LOG_FILENAME,
     GRAPH_FIELD_SEP,
+    DEFAULT_MAX_TOTAL_TOKENS,
     DEFAULT_MAX_FILE_PATH_LENGTH,
 )
 
@@ -1887,7 +1888,7 @@ async def process_chunks_unified(
             chunk_token_limit = getattr(
                 query_param,
                 "max_total_tokens",
-                global_config.get("MAX_TOTAL_TOKENS", 32000),
+                global_config.get("MAX_TOTAL_TOKENS", DEFAULT_MAX_TOTAL_TOKENS),
             )
 
         original_count = len(unique_chunks)

lightrag_webui/src/components/retrieval/QuerySettings.tsx

@@ -270,7 +270,7 @@ export default function QuerySettings() {
                   onBlur={(e) => {
                     const value = e.target.value
                     if (value === '' || isNaN(parseInt(value))) {
-                      handleChange('max_total_tokens', 1000)
+                      handleChange('max_total_tokens', 32000)
                     }
                   }}
                   min={1}