feat: emoji picker in create dialogs; due date and priority right under a deepened task; no flicker on kanban drop

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/storage/deepen_test.go

@@ -37,6 +37,10 @@ func TestDeepenTaskIntoNoteKeepsTheTask(t *testing.T) {
 	if err != nil || doc == nil || len(doc.Blocks) == 0 || doc.Blocks[0].ID != deepened.BlockID || doc.Blocks[0].Type != "todo" {
 		t.Fatalf("first block should be the linked checkbox: %+v %v", doc, err)
 	}
+	// Due date and priority come right under the checkbox, before the description
+	if len(doc.Blocks) < 3 || doc.Blocks[1].Content != "Priorität: Wichtig" || doc.Blocks[2].Content != "Restic oder Borg?" {
+		t.Fatalf("priority line should follow the checkbox, then the description: %+v", doc.Blocks)
+	}
 	// Completing the task ticks the checkbox in the note
 	if store.SyncDocBlockAndTask(anna.ID, th.ID, true) != deepened.DocID {
 		t.Fatal("completing the task should tick its block")