app.py analyse function fix 2

src/app.py

@@ -7,6 +7,17 @@ import sys
 import plotly.express as px
 import plotly.graph_objects as go
 from transformers import BertTokenizer
+import nltk
+
+# Download required NLTK data
+try:
+    nltk.data.find('tokenizers/punkt')
+except LookupError:
+    nltk.download('punkt')
+try:
+    nltk.data.find('corpora/stopwords')
+except LookupError:
+    nltk.download('stopwords')
 
 # Add project root to Python path
 project_root = Path(__file__).parent.parent