refactor(ClipboardHistory): Sync toggle button between saved and recent tabs (#2407)

* fix(ClipboardHistory): toggle button now toggles between saved and recents tabs

- Change tooltip text to reflect current tab state ('Recent' when on saved tab, 'Saved' when on recents tab)
- Previously always switched to saved tab; now toggles between 'saved' and 'recents'

* refactor(ClipboardHistory): remove redundant History button, keep single toggle button

The Saved button now toggles between saved/recents tabs, so the separate History
button is redundant and has been removed for a cleaner UI.

quickshell/Modals/Clipboard/ClipboardHeader.qml

@@ -49,16 +49,8 @@ Item {
             iconSize: Theme.iconSize - 4
             iconColor: header.activeTab === "saved" ? Theme.primary : Theme.surfaceText
             visible: header.pinnedCount > 0
-            tooltipText: I18n.tr("Saved")
-            onClicked: tabChanged("saved")
-        }
-
-        DankActionButton {
-            iconName: "history"
-            iconSize: Theme.iconSize - 4
-            iconColor: header.activeTab === "recents" ? Theme.primary : Theme.surfaceText
-            tooltipText: I18n.tr("History")
-            onClicked: tabChanged("recents")
+            tooltipText: header.activeTab === "saved" ? I18n.tr("Recent") : I18n.tr("Saved")
+            onClicked: tabChanged(header.activeTab === "saved" ? "recents" : "saved")
         }
 
         DankActionButton {