Sort completed subtasks to bottom of list

Fixes #12: completed subtasks now sort after uncompleted ones,
keeping actionable items at the top. Applied to both task detail
view and home screen widget.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/db/repository/tasks.ts

@@ -105,7 +105,7 @@ export async function getSubtasks(parentId: string) {
     .select()
     .from(tasks)
     .where(eq(tasks.parentId, parentId))
-    .orderBy(asc(tasks.position));
+    .orderBy(asc(tasks.completed), asc(tasks.position));
 }
 
 export async function getTaskById(id: string) {

src/services/widgetSync.ts

@@ -117,7 +117,7 @@ export async function syncWidgetData(): Promise<void> {
           .select({ id: tasks.id, title: tasks.title, completed: tasks.completed })
           .from(tasks)
           .where(eq(tasks.parentId, task.id))
-          .orderBy(asc(tasks.position));
+          .orderBy(asc(tasks.completed), asc(tasks.position));
         task.subtasks = subs;
       }
     }