fix: prevent migration script from adding props. to the export let identifier (#13899)

Author: paoloricciuti

.changeset/shaggy-seals-judge.md

@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: prevent migration script from adding `props.` to the `export let` identifier

packages/svelte/src/compiler/migrate/index.js

@@ -1514,7 +1514,7 @@ function handle_identifier(node, state, path) {
 			);
 		} else {
 			const binding = state.scope.get(node.name);
-			if (binding?.kind === 'bindable_prop') {
+			if (binding?.kind === 'bindable_prop' && binding.node !== node) {
 				state.str.prependLeft(/** @type {number} */ (node.start), `${state.names.props}.`);
 			}
 		}

packages/svelte/tests/migrate/samples/not-prepend-props-to-export-let/input.svelte

@@ -0,0 +1,5 @@
+<script>
+	export let stuff;
+
+	console.log($$props);
+</script>

packages/svelte/tests/migrate/samples/not-prepend-props-to-export-let/output.svelte

@@ -0,0 +1,5 @@
+<script>
+	let { ...props } = $props();
+
+	console.log(props);
+</script>