try to fix manifest issues

Dockerfile

@@ -11,6 +11,7 @@ COPY app/requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt
 
 COPY app/ .
+COPY assets/ ./assets/
 
 # Exponer el puerto que definimos en main.py
 EXPOSE 8080

app/main.py

@@ -348,8 +348,8 @@ def main(page: ft.Page):
                 mensaje_tg = (
                     "🛠 *NUEVA SOLICITUD DE PRÉSTAMO*\n"
                     f"👤 *Alumno:* {escape_md(nombre.value)}\n"
-                    f"� *Horario:* {h_ext.value} a {h_dev.value}\n"
-                    f"� *Herramientas:*\n{escape_md(lista_items_str)}"
+                    f" *Horario:* {h_ext.value} a {h_dev.value}\n"
+                    f" *Herramientas:*\n{escape_md(lista_items_str)}"
                 )
                 
                 res_tg = enviar_telegram_con_botones(loan_id, mensaje_tg)
@@ -448,4 +448,12 @@ def main(page: ft.Page):
 
 if __name__ == "__main__":
     port = int(os.getenv("PORT", 7860))
-    ft.app(target=main, view=ft.AppView.WEB_BROWSER, host="0.0.0.0", port=port, assets_dir="../assets")
+    
+    # Buscar la carpeta de assets (local: ../assets, docker: ./assets)
+    current_dir = os.path.dirname(os.path.abspath(__file__))
+    assets_path = os.path.join(current_dir, "assets")
+    if not os.path.exists(assets_path):
+        assets_path = os.path.join(current_dir, "../assets")
+    
+    print(f"DEBUG: assets_dir set to: {assets_path}")
+    ft.app(target=main, view=ft.AppView.WEB_BROWSER, host="0.0.0.0", port=port, assets_dir=assets_path)