add support for changing task item.

svelte-ui/src/forms/TaskForm.svelte

@@ -86,7 +86,7 @@
         clearEndTime: endTime == "",
         active: !completed,
 
-        name, description, itemAmount,
+        itemId, name, description, itemAmount,
       }).then(() => {
         markStale("goal", "project", "task");
         modalStore.close();
@@ -108,7 +108,7 @@
     <label for="description">Description</label>
     <textarea disabled={deletion} name="description" bind:value={description} />
     <label for="itemId">Item</label>
-    <ItemSelect disabled={!creation} name="itemId" bind:value={itemId} />
+    <ItemSelect disabled={deletion} name="itemId" bind:value={itemId} />
     <label for="itemAmount">Amount</label>
     <input disabled={deletion} name="itemAmount" type="number" bind:value={itemAmount} />
     <label for="endTime">Deadline (Optional)</label>

svelte-ui/src/models/task.ts

@@ -38,6 +38,7 @@ export interface TaskInput {
 }
 
 export interface TaskUpdate {
+  itemId?: string
   itemAmount?: number
   name?: string
   description?: string