implemented storing of data entered into a task form in localstore

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

frontend/src/Components/MarkdownEditor.svelte

@@ -6,6 +6,7 @@
     let {
         editable = true,
         onclick  = evt => {},
+        onRender = src => {},
         onSet    = newVal => {return true;},
         simple   = false,
         type     = 'div',
@@ -50,6 +51,7 @@
             body       : editValue.source
         });
         editValue.rendered = await resp.text();
+        onRender(editValue.source);
     }
 
     function typed(ev){

frontend/src/routes/task/Add.svelte

@@ -16,8 +16,8 @@
     let extendedSettings = $state(false);
     let parent_task      = $state(null);
     let task = $state({
-        name           : '',
-        description    : { source : '', rendered : '' },
+        name           : localStorage.getItem('task.name'),
+        description    : { source : localStorage.getItem('task.markdown'), rendered : '' },
         due_date       : null,
         est_time       : null,
         members        : {},
@@ -42,6 +42,14 @@
         ///  TODO: ?
     }
 
+    async function getCandidates(text){
+        const origin = parent_task ? parent_task.members : project.members;
+        const candidates = Object.values(origin)
+            .filter(member => member.user.name.toLowerCase().includes(text.toLowerCase()))
+            .map(member => [member.user.id,member.user.name]);
+        return Object.fromEntries(candidates);
+    }
+
     async function load(){
         if (parent_task_id) await loadParent();
         if (project_id) loadProject();
@@ -87,15 +95,6 @@
         }
     }
 
-    async function getCandidates(text){
-        const origin = parent_task ? parent_task.members : project.members;
-        const candidates = Object.values(origin)
-            .filter(member => member.user.name.toLowerCase().includes(text.toLowerCase()))
-            .map(member => [member.user.id,member.user.name]);
-        return Object.fromEntries(candidates);
-    }
-
-
      function onkeydown(e){
         if (e.ctrlKey && e.keyCode === 83) {
             e.preventDefault();
@@ -111,6 +110,8 @@
             body        : JSON.stringify(task)
         });
         if (resp.ok) {
+            localStorage.removeItem('task.markdown');
+            localStorage.removeItem('task.name');
             if (!assignee) { // if assignee is set, this form was opened within an external context. hence we don`t want to navigate somewhere else!
                 task = await resp.json();
                 if (task.parent_task_id){
@@ -123,6 +124,12 @@
         }
     }
 
+    function storeSource(markdown){
+        if (markdown) localStorage.setItem('task.markdown',markdown);
+        localStorage.setItem('task.name',task.name);
+    }
+
+
     function toggleSettings(){
         extendedSettings = !extendedSettings;
     }
@@ -172,7 +179,7 @@
                     {t('description')}
                 </th>
                 <td>
-                    <MarkdownEditor bind:value={task.description} simple={true} />
+                    <MarkdownEditor bind:value={task.description} onRender={storeSource} simple={true} />
                 </td>
             </tr>
             <tr>