fix(dashboard): FAB shortcut opens add modal directly on target page

After navigating to tasks/calendar/shopping/notes via FAB, the page's
primary add-button is programmatically clicked so the new-item modal
opens without a second tap. FAB container right-margin doubled to avoid
overlap with the browser's edge-swipe gesture zone.

public/styles/dashboard.css

@@ -934,7 +934,7 @@
 .fab-container {
   position: fixed;
   bottom: calc(var(--nav-bottom-height) + 24px + var(--safe-area-inset-bottom));
-  right: var(--space-4);
+  right: calc(var(--space-4) * 2);
   z-index: calc(var(--z-nav) - 1);
   display: flex;
   flex-direction: column-reverse;