implemented storage of new wiki page version, prepared page display for several versions

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

frontend/src/routes/wiki/View.svelte

@@ -6,7 +6,7 @@
     import Editor      from '../../Components/MarkdownEditor.svelte';
 
     let error = $state(null);
-    let { id } = $props();
+    let { id, version } = $props();
     let page = $state(null);
 
     async function loadPage(){
@@ -28,13 +28,13 @@
             body:JSON.stringify(data)
         });
         if (res.ok){
-            return true;
             error = null;
+            page = await res.json();
+            return true;
         } else {
             error = await res.text();
             return false;
         }
-
     }
 
     onMount(loadPage);
@@ -44,5 +44,14 @@
 <span class="error">{error}</span>
 {/if}
 {#if page}
+<span class="version">{t('version')}</span>
+{#each Array.from({ length: page.version }, (_, i) => page.version - i) as v}
+<span class="version">
+    {#if v == page.version}[{/if}
+    <a href={`/wiki/${id}/version/${v}`}>{v}</a>
+    {#if v == page.version}]{/if}
+    &nbsp;
+</span>
+{/each}
 <Editor editable={true} value={page.content} onSet={s => patch({content:s})}></Editor>
 {/if}