feat(qt): Purchases follows the section navigation, sidebar or header

The separate "Purchases in title bar" placement toggle is gone: with Show
Purchases on, the entry sits wherever the other sections are — in the
sidebar while the navigation lives there, in the header beside the full
tabs or the compact buttons otherwise — so it is never the one entry left
behind. The nav_tb_purchases pref and its bridge key are retired; the
Show Purchases description says where the entry goes.

cc

crates/qbz-i18n/translations/de/LC_MESSAGES/qbz-ui.po

@@ -7623,3 +7623,7 @@ msgstr "-23 LUFS · Rundfunk (EBU R128)"
 #: qbz-qt/src/settings_qt.rs
 msgid "Custom ({} LUFS)"
 msgstr "Benutzerdefiniert ({} LUFS)"
+
+#: qbz-qt/qml/settings/NavigationSettings.qml
+msgid "Show the Purchases section beside the other sections — in the sidebar or the header, wherever they are — for browsing and downloading your purchased music"
+msgstr "Zeigt den Bereich Käufe neben den anderen Bereichen – in der Seitenleiste oder in der Kopfzeile, wo immer sie sind – zum Stöbern und Herunterladen deiner gekauften Musik"

crates/qbz-i18n/translations/en/LC_MESSAGES/qbz-ui.po

@@ -3253,3 +3253,7 @@ msgstr "-23 LUFS · Broadcast (EBU R128)"
 #: qbz-qt/src/settings_qt.rs
 msgid "Custom ({} LUFS)"
 msgstr "Custom ({} LUFS)"
+
+#: qbz-qt/qml/settings/NavigationSettings.qml
+msgid "Show the Purchases section beside the other sections — in the sidebar or the header, wherever they are — for browsing and downloading your purchased music"
+msgstr "Show the Purchases section beside the other sections — in the sidebar or the header, wherever they are — for browsing and downloading your purchased music"

crates/qbz-i18n/translations/es/LC_MESSAGES/qbz-ui.po

@@ -7629,3 +7629,7 @@ msgstr "-23 LUFS · Radiodifusión (EBU R128)"
 #: qbz-qt/src/settings_qt.rs
 msgid "Custom ({} LUFS)"
 msgstr "Personalizado ({} LUFS)"
+
+#: qbz-qt/qml/settings/NavigationSettings.qml
+msgid "Show the Purchases section beside the other sections — in the sidebar or the header, wherever they are — for browsing and downloading your purchased music"
+msgstr "Muestra la sección Compras junto a las demás secciones (en la barra lateral o en el encabezado, donde estén) para explorar y descargar tu música comprada"

crates/qbz-i18n/translations/fr/LC_MESSAGES/qbz-ui.po

@@ -7621,3 +7621,7 @@ msgstr "-23 LUFS · Diffusion (EBU R128)"
 #: qbz-qt/src/settings_qt.rs
 msgid "Custom ({} LUFS)"
 msgstr "Personnalisé ({} LUFS)"
+
+#: qbz-qt/qml/settings/NavigationSettings.qml
+msgid "Show the Purchases section beside the other sections — in the sidebar or the header, wherever they are — for browsing and downloading your purchased music"
+msgstr "Affiche la section Achats à côté des autres sections — dans la barre latérale ou l'en-tête, où qu'elles soient — pour parcourir et télécharger votre musique achetée"

crates/qbz-i18n/translations/ja/LC_MESSAGES/qbz-ui.po

@@ -7604,3 +7604,7 @@ msgstr "-23 LUFS · 放送 (EBU R128)"
 #: qbz-qt/src/settings_qt.rs
 msgid "Custom ({} LUFS)"
 msgstr "カスタム（{} LUFS）"
+
+#: qbz-qt/qml/settings/NavigationSettings.qml
+msgid "Show the Purchases section beside the other sections — in the sidebar or the header, wherever they are — for browsing and downloading your purchased music"
+msgstr "購入セクションを他のセクションと同じ場所（サイドバーまたはヘッダー）に表示し、購入した音楽を閲覧・ダウンロードできます"

crates/qbz-i18n/translations/nl/LC_MESSAGES/qbz-ui.po

@@ -7611,3 +7611,7 @@ msgstr "-23 LUFS · Omroep (EBU R128)"
 #: qbz-qt/src/settings_qt.rs
 msgid "Custom ({} LUFS)"
 msgstr "Aangepast ({} LUFS)"
+
+#: qbz-qt/qml/settings/NavigationSettings.qml
+msgid "Show the Purchases section beside the other sections — in the sidebar or the header, wherever they are — for browsing and downloading your purchased music"
+msgstr "Toont de sectie Aankopen naast de andere secties — in de zijbalk of de koptekst, waar ze ook staan — om je gekochte muziek te bekijken en te downloaden"

crates/qbz-i18n/translations/pt/LC_MESSAGES/qbz-ui.po

@@ -7621,3 +7621,7 @@ msgstr "-23 LUFS · Radiodifusão (EBU R128)"
 #: qbz-qt/src/settings_qt.rs
 msgid "Custom ({} LUFS)"
 msgstr "Personalizado ({} LUFS)"
+
+#: qbz-qt/qml/settings/NavigationSettings.qml
+msgid "Show the Purchases section beside the other sections — in the sidebar or the header, wherever they are — for browsing and downloading your purchased music"
+msgstr "Mostra a seção Compras ao lado das outras seções (na barra lateral ou no cabeçalho, onde estiverem) para navegar e baixar suas músicas compradas"

crates/qbz-i18n/translations/ru/LC_MESSAGES/qbz-ui.po

@@ -7642,3 +7642,7 @@ msgstr "-23 LUFS · Вещание (EBU R128)"
 #: qbz-qt/src/settings_qt.rs
 msgid "Custom ({} LUFS)"
 msgstr "Своё значение ({} LUFS)"
+
+#: qbz-qt/qml/settings/NavigationSettings.qml
+msgid "Show the Purchases section beside the other sections — in the sidebar or the header, wherever they are — for browsing and downloading your purchased music"
+msgstr "Показывает раздел «Покупки» рядом с остальными разделами — в боковой панели или в заголовке, где бы они ни были — для просмотра и загрузки купленной музыки"

crates/qbz-qt/qml/settings/NavigationSettings.qml

@@ -92,25 +92,14 @@ Column {
     }
     SettingRow { kioskHost: root.kioskHost;
         label: QbzSession.tr("Show Purchases", QbzSession.trRev)
-        description: QbzSession.tr("Show the Purchases section in the sidebar for browsing and downloading your purchased music", QbzSession.trRev)
+        // Purchases follows the other sections — sidebar or header — so the
+        // separate "in title bar" placement toggle is gone (2026-09-13).
+        description: QbzSession.tr("Show the Purchases section beside the other sections — in the sidebar or the header, wherever they are — for browsing and downloading your purchased music", QbzSession.trRev)
         QbzToggle { kioskHost: root.kioskHost;
             checked: root.doc.showPurchases === true
             onToggled: function (v) { QbzBridge.settingsBool("show-purchases", v) }
         }
     }
-    SettingRow { kioskHost: root.kioskHost;
-        // Nothing to place while the section itself is off (owner
-        // 2026-08-21) — absent rather than rendered-and-inert.
-        visible: root.doc.showPurchases === true
-        label: QbzSession.tr("Purchases in title bar", QbzSession.trRev)
-        description: QbzSession.tr("Place the Purchases entry in the custom title bar instead of the sidebar", QbzSession.trRev)
-        rowEnabled: !root.tbLocked
-        QbzToggle { kioskHost: root.kioskHost;
-            enabled: !root.tbLocked
-            checked: root.doc.navTbPurchases === true
-            onToggled: function (v) { QbzBridge.settingsBool("nav-tb-purchases", v) }
-        }
-    }
 
     SettingsSpacer { }
     SettingsDivider { }

crates/qbz-qt/qml/shell/HeaderBar.qml

@@ -175,15 +175,14 @@ Rectangle {
         try { return JSON.parse(QbzBridge.settingsJson) } catch (e) { return ({}) }
     }
 
-    // Follow navigation into the header, including the closed-sidebar fallback.
-    // The separate relocation preference also works while navigation stays in
-    // the sidebar; only that explicit title-bar placement needs custom chrome.
+    // Purchases FOLLOWS the section nav (2026-09-13): it is up here exactly
+    // when the sections are — the full tabs, or the compact buttons while
+    // the sidebar is closed / "Compact header navigation" is on — and in the
+    // sidebar otherwise (Sidebar.qml `purchasesVisible`).
     readonly property bool purchasesInHeader:
         root.settingsDoc.showPurchases === true
         && !QbzSession.offline
-        && (root.headerTabsOn || root.headerCompactOn
-            || (root.settingsDoc.navTbPurchases === true
-                && !QbzShell.systemTitleBar && !QbzShell.hideTitleBar))
+        && (root.headerTabsOn || root.headerCompactOn)
 
     // Highlighted section — derived from the live view (see NavFlyout), OR'd
     // in the triggers with "my menu is open" (Slint highlights off
@@ -452,13 +451,6 @@ Rectangle {
             }
         }
 
-        // Explicit Purchases relocation with the other navigation in the sidebar.
-        PurchaseTab {
-            visible: root.purchasesInHeader && !root.headerTabsOn && !root.headerCompactOn
-            showIcon: root.width >= 1140
-            anchors.verticalCenter: parent.verticalCenter
-        }
-
         // Compact section nav — while the sidebar is fully closed (so the
         // sections stay reachable), or always when the nav is in the header
         // and "Compact header navigation" is ON (HeaderBar.slint:974).

crates/qbz-qt/qml/shell/Sidebar.qml

@@ -53,9 +53,10 @@
 // PURCHASES is the one row in that block that is NOT a section: it is a
 // DirectRow (SidebarDirectRow) — no dropdown, no catalog entry, it just
 // navigates — and it is triple-gated (opt-in `show_purchases`, hidden while
-// offline, and relocated to the custom title bar by `nav_tb_purchases`).
-// Both prefs default OFF, so on a stock install this block is still the same
-// four section rows it has always been.
+// offline, and shown only while the sections themselves live here: with the
+// navigation in the header it follows them up there). The pref defaults
+// OFF, so on a stock install this block is still the same four section rows
+// it has always been.
 // The playlist/folder tree below the nav IS live (sidebar_qt.rs: load, sort,
 // search, expand/collapse, drag-drop target), and so is everything the "..."
 // menu offers: New folder opens QbzFolderEdit's create panel (the small
@@ -146,9 +147,9 @@ Rectangle {
     // NO new bridge property is needed. `settings_bool`'s tail is
     // unconditional on success — `publish_snapshot()` re-serialises the WHOLE
     // settings document after every successful write (settings_qt.rs:2278-2285)
-    // — and both prefs are already in it (`showPurchases` / `navTbPurchases`,
-    // :1446-1449). So the two Appearance toggles reach this row through
-    // QbzBridge.settingsJson and nothing else is wired.
+    // — and the pref is already in it (`showPurchases`). So the Navigation
+    // toggle reaches this row through QbzBridge.settingsJson and nothing
+    // else is wired.
     //
     // GUARDED parse, the NavFlyout.qml:65-70 precedent: a bare JSON.parse in a
     // binding throws on the pre-publish frame and would take the whole sidebar
@@ -156,19 +157,15 @@ Rectangle {
     readonly property var settingsDoc: {
         try { return JSON.parse(QbzBridge.settingsJson) } catch (e) { return ({}) }
     }
-    // `show_purchases` is the MASTER gate; `nav_tb_purchases` only RELOCATES
-    // the entry to the custom title bar — and it can only relocate it when
-    // there IS one. Under the system chrome, or with no title bar at all, the
-    // entry stays here (the truth table's fourth row): the Appearance toggle
-    // is disabled in those states, but a `true` set earlier survives the
-    // switch, and honouring it then would make Purchases unreachable.
-    // Both prefs default false — Purchases ships hidden.
+    // `show_purchases` is the MASTER gate. Purchases then FOLLOWS the other
+    // sections (2026-09-13): it sits here while the navigation lives in the
+    // sidebar, and in the header beside them otherwise (HeaderBar.qml
+    // `purchasesInHeader`) — never the one entry left behind. The pref
+    // defaults false: Purchases ships hidden.
     readonly property bool purchasesVisible:
         root.settingsDoc.showPurchases === true
         && !QbzSession.offline
-        && !(root.settingsDoc.navTbPurchases === true
-             && !QbzShell.systemTitleBar
-             && !QbzShell.hideTitleBar)
+        && QbzShell.navInSidebar
 
     // Playlist tree state (phase 7).
     property bool searchOpen: false

crates/qbz-qt/src/settings_qt.rs

@@ -2258,8 +2258,6 @@ pub struct SettingsDoc {
     pub startup_page_index: i32,
     #[serde(rename = "showPurchases")]
     pub show_purchases: bool,
-    #[serde(rename = "navTbPurchases")]
-    pub nav_tb_purchases: bool,
     /// Opt-in: a click on a top-level section row (Discover / Library / Local
     /// Library / My QBZ) also NAVIGATES, landing on that section's first entry.
     /// Off by default, which is the behaviour that shipped: a click only opens
@@ -2807,7 +2805,6 @@ pub async fn publish_snapshot() {
             startup_pages: STARTUP_PAGE_LABELS.iter().map(|l| qbz_i18n::t(l)).collect(),
             startup_page_index: index_of(STARTUP_PAGE_VALUES, &pref_str("startup_page", "home"), 0),
             show_purchases: pref_bool("show_purchases", false),
-            nav_tb_purchases: pref_bool("nav_tb_purchases", false),
             nav_click_first_tab: pref_bool("nav_click_first_tab", false),
             local_tab_order: local_tab_order(),
             genre_filters_position: local_genre_filters_position(),
@@ -3757,10 +3754,6 @@ pub async fn settings_bool(runtime: &Arc<AppRuntime<LoggingAdapter>>, key: &str,
             save_pref("show_purchases", serde_json::json!(value));
             Ok(Apply::None)
         }
-        "nav-tb-purchases" => {
-            save_pref("nav_tb_purchases", serde_json::json!(value));
-            Ok(Apply::None)
-        }
         // Read by BOTH nav hosts off `settingsJson` (shell/NavFlyout.qml), so
         // there is nothing to apply here beyond the write and the republish
         // every settings toggle already does.