Routes are initially mounted with undefined path parameters

[angryziber]

Describe the bug
Path parameters are not provided to mounted components right away; the actually values are only available after the first render, needing another update to render properly.

To Reproduce
<Route path="/something/:hello" component={MyComponent}/>

When opening /something/world in the browser, MyComponent will first get undefined as value of hello prop, and only then will get the actual value.

Expected behavior
The value of hello prop should be right on the first render to avoid re-rendering again.

The problem may be due to the Route component running all component functions with await. In Svelte5 all components are functions.