feat: fix: preserve processing mode selection in UI with state management

app.py

@@ -58,23 +58,25 @@ def process_old_ssml_text(ssml_text):
 def index():
     processed_text = ""
     input_text = ""
+    current_endpoint = "/"
     
     if request.method == 'POST':
         input_text = request.form.get('input_text', '')
         processed_text = process_ssml_text(input_text)
     
-    return render_template('index.html', processed_text=processed_text, input_text=input_text)
+    return render_template('index.html', processed_text=processed_text, input_text=input_text, current_endpoint=current_endpoint)
 
 @app.route('/old', methods=['GET', 'POST'])
 def old_index():
     processed_text = ""
     input_text = ""
+    current_endpoint = "/old"
     
     if request.method == 'POST':
         input_text = request.form.get('input_text', '')
         processed_text = process_old_ssml_text(input_text)
     
-    return render_template('index.html', processed_text=processed_text, input_text=input_text)
+    return render_template('index.html', processed_text=processed_text, input_text=input_text, current_endpoint=current_endpoint)
 
 if __name__ == '__main__':
     app.run(debug=True)

templates/index.html

@@ -118,8 +118,8 @@
             <div class="endpoint-selector">
                 <label for="endpoint">Processing Mode:</label>
                 <select id="endpoint" name="endpoint">
-                    <option value="/" selected>New Format (textnorm)</option>
-                    <option value="/old">Old Format (DECIMAL/CURRENCY/DATE....)</option>
+                    <option value="/" {% if current_endpoint == "/" %}selected{% endif %}>New Format (textnorm)</option>
+                    <option value="/old" {% if current_endpoint == "/old" %}selected{% endif %}>Old Format (DECIMAL/CURRENCY/DATE....)</option>
                 </select>
             </div>