add button for opening mod folder

Main.qml

@@ -450,6 +450,31 @@ Window {
         }
     }
 
+    // ── Open mods folder button ────────────────────────────────────────────
+    Button {
+        id: folderButton
+        width: 42
+        height: 42
+        anchors.left: versionBox.right
+        anchors.leftMargin: 8
+        anchors.verticalCenter: versionBox.verticalCenter
+        hoverEnabled: true
+
+        background: Image {
+            id: folderButtonImage
+            anchors.fill: parent
+            source: folderButton.pressed ? "images/Folder/Folder_Pressed.svg"
+                  : folderButton.hovered ? "images/Folder/Folder_Active.svg"
+                                         : "images/Folder/Folder_Idle.svg"
+            fillMode: Image.PreserveAspectFit
+        }
+
+        ToolTip.visible: hovered
+        ToolTip.text: qsTr("Открыть папку с модами Minecraft")
+
+        onClicked: backend.openMinecraftFolder()
+    }
+
     // ── Add Profile Dialog ─────────────────────────────────────────────────
     // Bug fix: header/footer must be Item (not Rectangle) with explicit
     // implicitHeight so Dialog correctly computes its own total height.