Fix: Add langchain-text-splitters dependency for LangChain 0.3+ compatibility

In LangChain 0.3+, the text_splitter module was moved to a separate package
langchain-text-splitters. This fixes the "No module named 'langchain.text_splitter'"
error when deploying to Hugging Face Spaces.

Changes:
- Added langchain-text-splitters>=0.3.0 to pyproject.toml dependencies
- Updated import in text_chunking_strategies.py to use langchain_text_splitters
- Explicitly install langchain-text-splitters in Dockerfile

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Dockerfile

@@ -34,11 +34,12 @@ WORKDIR /app
 COPY --chown=user pyproject.toml ./
 
 # Install dependencies directly with pip (more reliable than uv)
-# Force fresh install with langchain packages (2025-10-15)
+# Force fresh install with langchain packages (2025-10-23)
 RUN pip install --user --upgrade pip && \
     pip install --user --timeout=600 --retries=3 --no-cache-dir \
     "langchain>=0.3.0" \
-    "langchain-community>=0.3.0" && \
+    "langchain-community>=0.3.0" \
+    "langchain-text-splitters>=0.3.0" && \
     pip install --user --timeout=600 --retries=3 --no-cache-dir -e .
 
 # Copy application code with proper ownership

agentgraph/input/text_processing/text_chunking_strategies.py

@@ -12,7 +12,7 @@ from dataclasses import dataclass
 from datetime import datetime
 from typing import Dict, Any, List, Tuple, Optional
 
-from langchain.text_splitter import RecursiveCharacterTextSplitter
+from langchain_text_splitters import RecursiveCharacterTextSplitter
 from langchain_community.document_loaders import JSONLoader
 
 # Import agent-aware components

pyproject.toml

@@ -45,6 +45,7 @@ dependencies = [
     "langsmith>=0.3.38",         # ✅ 核心 (12+ 使用)
     "langchain>=0.3.0",          # ✅ 核心 (text splitting)
     "langchain-community>=0.3.0", # ✅ 核心 (document loaders)
+    "langchain-text-splitters>=0.3.0", # ✅ 核心 (text splitting - required for langchain 0.3+)
     "crewai>=0.108.0",           # ✅ 功能性 (2+ 使用)
     "crewai-tools>=0.38.1",      # ✅ 功能性
     "langgraph>=0.5.3",          # ✅ 功能性