implemented patching of project tasks when new user is added to project

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

frontend/src/routes/project/View.svelte

@@ -25,12 +25,13 @@
     let tasks          = $state(null);
     let show_closed    = $state(false);
     let new_color      = $state({tag:null,color:'#00aa00'})
+    let inherit_from   = $state(0);
 
     let new_state = $state({code:null,name:null})
     let state_available=$derived(new_state.name && new_state.code && !project.allowed_states[new_state.code]);
 
     async function addMember(user){
-        return await update({new_member:+user.id});
+        return await update({new_member:+user.id,inherit_from});
     }
 
     async function addState(){
@@ -239,7 +240,16 @@
     </label>
     <div class="em">{t('members')}</div>
     <div class="em">
-        <PermissionEditor members={project.members} {updatePermission} {addMember} {dropMember} />
+        <PermissionEditor members={project.members} {updatePermission} {addMember} {dropMember} enabled={inherit_from != 0}/>
+        <label>
+            └→ Inherit task permissions from:
+            <select bind:value={inherit_from}>
+                <option value={0}>{t('select user')}</option>
+                {#each Object.values(project.members) as member (member.user.id)}
+                <option value={member.user.id}>{member.user.name}</option>
+                {/each}
+            </select>
+        </label>
     </div>
     {#if project.allowed_states}
     {#each Object.keys(project.allowed_states) as key,idx}