feat: add dynamic preview panel resizing and individual window instance close button

quickshell/modules/dock/BottomDock.qml

@@ -495,10 +495,14 @@ Item {
 
             GlassPanel {
                 id: previewGlass
-                implicitWidth: previewMainCol.implicitWidth + 20
+                implicitWidth: previewMainCol.implicitWidth + 24
                 implicitHeight: previewMainCol.implicitHeight + 16
                 anchors.fill: parent
 
+                Behavior on implicitWidth {
+                    NumberAnimation { duration: 180; easing.type: Easing.OutCubic }
+                }
+
                 opacity: dockWindowPreview.animProgress
                 scale: 0.90 + 0.10 * dockWindowPreview.animProgress
                 transformOrigin: Item.Bottom
@@ -634,7 +638,10 @@ Item {
                                                         anchors.fill: parent
                                                         hoverEnabled: true
                                                         onClicked: {
-                                                            TaskService.closeApp(modelData.appId)
+                                                            TaskService.closeSpecificWindow(modelData)
+                                                            let rem = root.previewWindowInstances ? root.previewWindowInstances.filter(w => w.id !== modelData.id) : []
+                                                            root.previewWindowInstances = rem
+                                                            if (!rem || rem.length === 0) {
                                                                 previewPopIn.running = false
                                                                 previewPopOut.restart()
                                                             }
@@ -642,6 +649,7 @@ Item {
                                                     }
                                                 }
                                             }
+                                        }
 
                                         // Miniature Glass Window Preview Container
                                         Rectangle {

quickshell/services/TaskService.qml

@@ -169,6 +169,16 @@ Item {
         proc.running = true
     }
 
+    function closeSpecificWindow(winObj) {
+        if (!winObj) return;
+        let winId = (winObj.id || "").toString().trim()
+        let query = (winObj.caption || winObj.appId || "").toLowerCase().trim()
+
+        proc.running = false
+        proc.command = ["python3", Quickshell.env("HOME") + "/.config/quickshell/services/python/kwin_close.py", winId, query]
+        proc.running = true
+    }
+
     function focusApp(appId, cmd, iconX, iconY) {
         if (!appId) return;
         let lower = appId.toLowerCase().trim()

quickshell/services/js/kwin_close.js

@@ -0,0 +1,30 @@
+// KWin JavaScript Script: Gracefully Close Specific Window Instance
+var targetId = "%WIN_ID%".trim();
+var targetQuery = "%TARGET_QUERY%".toLowerCase().trim();
+
+if (targetId || targetQuery) {
+    var windows = workspace.windowList();
+    for (var i = 0; i < windows.length; i++) {
+        var win = windows[i];
+        var id = String(win.internalId || win.windowId || "");
+        var cls = (win.desktopFileName || win.resourceClass || win.resourceName || "").toLowerCase().trim();
+        var caption = (win.caption || "").toLowerCase().trim();
+
+        var matches = false;
+        if (targetId && id && (id === targetId || id.indexOf(targetId) !== -1)) {
+            matches = true;
+        }
+        if (!matches && targetQuery) {
+            if (caption && caption.indexOf(targetQuery) !== -1) {
+                matches = true;
+            } else if (cls && cls.indexOf(targetQuery) !== -1) {
+                matches = true;
+            }
+        }
+
+        if (matches) {
+            win.closeWindow();
+            break;
+        }
+    }
+}

quickshell/services/python/kwin_close.py

@@ -0,0 +1,36 @@
+#!/usr/bin/env python3
+import sys
+import os
+import subprocess
+
+JS_TEMPLATE_PATH = os.path.expanduser('~/.config/quickshell/services/js/kwin_close.js')
+
+def close_window(win_id="", target_query=""):
+    try:
+        with open(JS_TEMPLATE_PATH, 'r', encoding='utf-8') as f:
+            template = f.read()
+
+        script = template.replace('%WIN_ID%', win_id).replace('%TARGET_QUERY%', target_query)
+        
+        target_js = '/tmp/kwin_close.js'
+        with open(target_js, 'w', encoding='utf-8') as f:
+            f.write(script)
+
+        # Unload previous script instance to prevent KWin memory leaks
+        subprocess.run(['busctl', '--user', 'call', 'org.kde.KWin', '/Scripting', 'org.kde.kwin.Scripting', 'unloadScript', 's', target_js], capture_output=True)
+
+        res = subprocess.check_output(
+            ['busctl', '--user', 'call', 'org.kde.KWin', '/Scripting', 'org.kde.kwin.Scripting', 'loadScript', 's', target_js],
+            text=True
+        )
+        sid = res.strip().split()[-1]
+        subprocess.run(['busctl', '--user', 'call', 'org.kde.KWin', f'/Scripting/Script{sid}', 'org.kde.kwin.Script', 'run'], capture_output=True)
+        subprocess.run(['busctl', '--user', 'call', 'org.kde.KWin', f'/Scripting/Script{sid}', 'org.kde.kwin.Script', 'stop'], capture_output=True)
+        subprocess.run(['busctl', '--user', 'call', 'org.kde.KWin', '/Scripting', 'org.kde.kwin.Scripting', 'unloadScript', 's', target_js], capture_output=True)
+    except Exception:
+        pass
+
+if __name__ == '__main__':
+    win_id = sys.argv[1] if len(sys.argv) >= 2 else ""
+    target_query = sys.argv[2] if len(sys.argv) >= 3 else ""
+    close_window(win_id, target_query)