Return a 404 when paring the route fails (#3860)

* return a 404 when paring the route fails

* add a playwright test for fullstack routing status codes

* Fix new playwright test

* document SSRError

* Make SSRError public and fix clippy

* Move the error display bound to the routable trait

* fix clippy

* return a more generic 404 message

* fix router tests

packages/core/src/error_boundary.rs

@@ -3,7 +3,7 @@ use crate::{
     Properties, ScopeId, Template, TemplateAttribute, TemplateNode, VNode,
 };
 use std::{
-    any::{Any, TypeId},
+    any::Any,
     backtrace::Backtrace,
     cell::{Ref, RefCell},
     error::Error,
@@ -493,11 +493,7 @@ impl Display for CapturedError {
 impl CapturedError {
     /// Downcast the error type into a concrete error type
     pub fn downcast<T: 'static>(&self) -> Option<&T> {
-        if TypeId::of::<T>() == (*self.error).type_id() {
-            self.error.as_any().downcast_ref::<T>()
-        } else {
-            None
-        }
+        self.error.as_any().downcast_ref::<T>()
     }
 }