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diff --git a/src/threadlistview.h b/src/threadlistview.h
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+/*
+ * qtmaildir - a Qt6 mail client for notmuch-indexed Maildirs
+ * Copyright (C) 2026 Danilo M. <danix@danix.xyz>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#pragma once
+
+#include <QTableView>
+
+/// The thread list, with a row-wide strip of tag chips under each row's cells.
+///
+/// The strip is painted by the VIEW rather than by a delegate, and that is the
+/// whole reason this class exists. A delegate is handed one cell's rectangle
+/// and cannot paint outside its column, so pills drawn from the subject
+/// column's delegate stop at that column's edge, losing the last tags of a
+/// well-tagged thread, and start at that column's left edge, which puts them
+/// under the subject instead of under the row. Painting after the cells lets
+/// the strip run the full width, which is what the layout asks for:
+///
+///     [ date ][ from ][ subject ...................... ]
+///       [ pill ][ pill ][ pill ]
+///
+/// The cells confine themselves to the upper band so the lower one is free;
+/// SubjectDelegate::kRowPadding and rowHeightFor() are the shared measurements
+/// that keep the two halves agreeing.
+class ThreadListView : public QTableView
+{
+    Q_OBJECT
+public:
+    using QTableView::QTableView;
+
+protected:
+    void paintEvent(QPaintEvent *event) override;
+};