Update app.py

app.py

@@ -80,10 +80,16 @@ def thuvien():
     return render_template('thuvien.html', cases=cases)
 
 # Route cho trang before/after
-@app.route('/bfat')
-def bfat():
-    case = data['case_studies'][0] if data['case_studies'] else {}
-    return render_template('bfat.html', case=case)
+@app.route('/bfat', defaults={'case_id': None})
+@app.route('/bfat/<int:case_id>')
+def bfat(case_id):
+    cases = data['case_studies']
+    if case_id is not None:
+        selected_case = next((c for c in cases if c['id'] == case_id), None)
+        if not selected_case:
+            abort(404)
+        return render_template('bfat.html', cases=cases, selected_case=selected_case)
+    return render_template('bfat.html', cases=cases, selected_case=None)
 
 # Route cho trang dịch vụ
 @app.route('/dichvu')