style(simple-modal): adjust heading styles for improved readability

style(toast-container): reduce gap between toast items for better spacing

src/app/shared/components/simple-modal/simple-modal.component.scss

@@ -11,6 +11,11 @@
   line-height: 1.5;
 }
 
+h2.simple-modal__content {
+  font-size: 15px;
+  font-weight: bold;
+}
+
 .simple-modal__actions {
   display: flex;
   justify-content: center;

src/app/shared/components/toast-container/toast-container.component.scss

@@ -2,7 +2,7 @@
   z-index: 1500;
   display: flex;
   flex-direction: column;
-  gap: 0.5rem;
+  gap: 0.25rem;
   pointer-events: none;
   width: 90vw;
   max-width: 800px;
@@ -43,4 +43,4 @@
     opacity: 1;
     transform: translateY(0) scale(1);
   }
-}
+}