[fix] rebuild manifest when client hooks or param matcher file is add…

…ed/removed (#7915)

* [fix] rebuild manifest when client hook file is added/removed

In contrast to server hooks, client hooks are written to the client manifest and therefore need rebuilding when they are added/removed

* also applies to param matchers

.changeset/wet-trainers-perform.md

@@ -0,0 +1,5 @@
+---
+'@sveltejs/kit': patch
+---
+
+[fix] rebuild manifest when client hooks or param matcher file is added/removed

packages/kit/src/core/sync/write_types/index.js

@@ -150,7 +150,7 @@ export async function write_types(config, manifest_data, file) {
 	const id = '/' + posixify(path.relative(config.kit.files.routes, path.dirname(file)));
 
 	const route = manifest_data.routes.find((route) => route.id === id);
-	if (!route) return; // this shouldn't ever happen
+	if (!route) return;
 	if (!route.leaf && !route.layout && !route.endpoint) return; // nothing to do
 
 	update_types(config, create_routes_map(manifest_data), route);

packages/kit/src/exports/vite/dev/index.js

@@ -202,7 +202,13 @@ export async function dev(vite, vite_config, svelte_config) {
 	 */
 	const watch = (event, cb) => {
 		vite.watcher.on(event, (file) => {
-			if (file.startsWith(svelte_config.kit.files.routes + path.sep)) {
+			if (
+				file.startsWith(svelte_config.kit.files.routes + path.sep) ||
+				file.startsWith(svelte_config.kit.files.params + path.sep) ||
+				// in contrast to server hooks, client hooks are written to the client manifest
+				// and therefore need rebuilding when they are added/removed
+				file.startsWith(svelte_config.kit.files.hooks.client)
+			) {
 				cb(file);
 			}
 		});