session: fix persist on empty file

.gitignore

@@ -108,3 +108,4 @@ bin/
 # direnv
 .envrc
 .direnv/
+quickshell/dms-plugins

quickshell/Common/SessionData.qml

@@ -158,12 +158,7 @@ Singleton {
     function parseSettings(content) {
         _parseError = false;
         try {
-            if (!content || !content.trim()) {
-                _parseError = true;
-                return;
-            }
-
-            let obj = JSON.parse(content);
+            let obj = (content && content.trim()) ? JSON.parse(content) : {};
 
             if (obj.brightnessLogarithmicDevices && !obj.brightnessExponentialDevices) {
                 obj.brightnessExponentialDevices = obj.brightnessLogarithmicDevices;

quickshell/Common/Theme.qml

@@ -89,6 +89,8 @@ Singleton {
     property bool qtThemingEnabled: typeof SettingsData !== "undefined" ? (SettingsData.qt5ctAvailable || SettingsData.qt6ctAvailable) : false
     property var workerRunning: false
     property var pendingThemeRequest: null
+
+    signal matugenCompleted(string mode, string result)
     property var matugenColors: ({})
     property var _pendingGenerateParams: null
 
@@ -1272,26 +1274,34 @@ Singleton {
 
         onExited: exitCode => {
             workerRunning = false;
+            const currentMode = (typeof SessionData !== "undefined" && SessionData.isLightMode) ? "light" : "dark";
 
-            if (exitCode === 0) {
+            switch (exitCode) {
+            case 0:
                 console.info("Theme: Matugen worker completed successfully");
-            } else if (exitCode === 2) {
+                root.matugenCompleted(currentMode, "success");
+                break;
+            case 2:
                 console.log("Theme: Matugen worker completed with code 2 (no changes needed)");
-            } else {
+                root.matugenCompleted(currentMode, "no-changes");
+                break;
+            default:
                 if (typeof ToastService !== "undefined") {
                     ToastService.showError("Theme worker failed (" + exitCode + ")");
                 }
                 console.warn("Theme: Matugen worker failed with exit code:", exitCode);
+                root.matugenCompleted(currentMode, "error");
             }
 
-            if (pendingThemeRequest) {
+            if (!pendingThemeRequest)
+                return;
+
             const req = pendingThemeRequest;
             pendingThemeRequest = null;
             console.info("Theme: Processing queued theme request");
             setDesiredTheme(req.kind, req.value, req.isLight, req.iconTheme, req.matugenType, req.stockColors);
         }
     }
-    }
 
     FileView {
         id: customThemeFileView