Update app.py

app.py

@@ -20,6 +20,24 @@ os.makedirs(EMB_DIR, exist_ok=True)
 MODEL_NAME = "all-MiniLM-L6-v2"
 model = SentenceTransformer(MODEL_NAME)
 
+def build_or_load_embeddings(df, name):
+    path = embeddings_path(name)
+    if os.path.exists(path):
+        try:
+            with open(path,"rb") as f:
+                emb = pickle.load(f)
+            if len(emb) == len(df):
+                return emb
+        except Exception:
+            pass
+    texts = df["Title"].astype(str).tolist()
+    emb = model.encode(texts, convert_to_numpy=True, show_progress_bar=True)
+    with open(path,"wb") as f:
+        pickle.dump(emb,f)
+    return emb
+
+books_embeddings = build_or_load_embeddings(books_df,"books")
+theses_embeddings = build_or_load_embeddings(theses_df,"theses")
 # ================== تحميل من Drive ==================
 def download_from_drive(file_id, output):
     if not os.path.exists(output):