preparing to make items/locations referencable

Signed-off-by: Stephan Richter <s.richter@srsoftware.de>

frontend/src/routes/stock/Index.svelte

@@ -17,6 +17,7 @@
     let location        = $state(null);
     let draggedItem     = $state(null)
     let draggedLocation = $state(null)
+    let { location_id } = $props();
 
     $effect(() => {
         // This effect runs whenever `location` changes
@@ -122,6 +123,7 @@
 
     function load(){
         loadUserLocations();
+        unfoldPath();
         loadProperties();
     }
 
@@ -167,18 +169,25 @@
        window.history.replaceState(window.history.state, '', url);
     }
 
+    // tries to unfold the path to a certain location, if a locationId is supplied via URL
+    function unfoldPath(){
+        if (!locationId) return;
+        // TODO
+    }
+
     function unlistLocation(loc){
         for (var owner of top_level){
             if (owner.locations && dropNestedLocation(owner.locations,loc)) break;
         }
     }
 
-
-
     onMount(load);
 </script>
 
 <h2>{t('Stock')}</h2>
+{#if location_id}
+{location_id}
+{/if}
 <div class="grid3">
     <div class="locations">
         {#if top_level}