Fix stale data in tippy

src/lib/components/Tippy.svelte

@@ -17,6 +17,15 @@
 
   let element: Element
 
+  // `mount` only tracks prop changes when the props come from a `$state` object,
+  // so sync incoming props into a reactive one. Without this the popover keeps
+  // the props it was first mounted with, showing stale data after the source updates.
+  const mountedProps = $state({...props})
+
+  $effect(() => {
+    Object.assign(mountedProps, props)
+  })
+
   onMount(() => {
     const target = document.createElement("div")
 
@@ -28,7 +37,7 @@
       ...params,
     })
 
-    instance = mount(component, {target, props})
+    instance = mount(component, {target, props: mountedProps})
 
     return () => {
       popover?.destroy()