Disable Turbo prefetch on dashboard outflow category links

Hovering over category links in the outflow donut chart triggered
Turbo 8's default link prefetching, which made a real request to the
transactions controller. The controller's store_params! before_action
saved those filter params (category + date range) to the session.
When the user later navigated to /transactions via the nav menu,
the stored params were restored, showing an unexpected filtered view.

Adding data-turbo-prefetch="false" prevents the prefetch on hover
while preserving the intended click-to-navigate behavior.

https://claude.ai/code/session_01Na7AF1wyidPwFdPq5w8oaw

app/views/pages/dashboard/_outflows_donut.html.erb

@@ -104,6 +104,7 @@
                   class: "flex items-center justify-between mx-3 p-3 rounded-lg cursor-pointer group gap-3",
                   data: {
                     turbo_frame: "_top",
+                    turbo_prefetch: false,
                     category_id: category[:id],
                     action: "mouseenter->donut-chart#highlightSegment mouseleave->donut-chart#unhighlightSegment"
                   } do %>