feat: add load/save + fail signals

plugin/src/Caelestia/Config/config.cpp

@@ -18,7 +18,7 @@ QString configDir() {
 } // namespace
 
 GlobalConfig::GlobalConfig(QObject* parent)
-    : ConfigObject(parent)
+    : RootConfig(parent)
     , m_appearance(new AppearanceConfig(this))
     , m_general(new GeneralConfig(this))
     , m_background(new BackgroundConfig(this))
@@ -47,7 +47,7 @@ GlobalConfig::GlobalConfig(QObject* parent)
 }
 
 GlobalConfig::GlobalConfig(GlobalConfig* fallback, const QString& filePath, QObject* parent)
-    : ConfigObject(parent)
+    : RootConfig(parent)
     , m_appearance(new AppearanceConfig(this))
     , m_general(new GeneralConfig(this))
     , m_background(new BackgroundConfig(this))
@@ -120,14 +120,6 @@ GlobalConfig* GlobalConfig::create(QQmlEngine* engine, QJSEngine* jsEngine) {
     return config;
 }
 
-void GlobalConfig::save() {
-    saveToFile();
-}
-
-void GlobalConfig::reload() {
-    reloadFromFile();
-}
-
 // Config (attached type)
 
 Config::Config(ConfigScope* scope, QObject* parent)

plugin/src/Caelestia/Config/config.hpp

@@ -22,7 +22,7 @@
 
 namespace caelestia::config {
 
-class GlobalConfig : public ConfigObject {
+class GlobalConfig : public RootConfig {
     Q_OBJECT
     QML_ELEMENT
     QML_SINGLETON
@@ -50,9 +50,6 @@ public:
     [[nodiscard]] Q_INVOKABLE GlobalConfig* defaults();
     static GlobalConfig* create(QQmlEngine*, QJSEngine*);
 
-    Q_INVOKABLE void save();
-    Q_INVOKABLE void reload();
-
     ~GlobalConfig() override;
 
     void bindAppearanceTokens();

plugin/src/Caelestia/Config/configobject.cpp

@@ -298,12 +298,16 @@ void ConfigObject::setupFileBackend(const QString& path) {
 
         QFile file(m_filePath);
         if (!file.open(QIODevice::WriteOnly)) {
-            qCWarning(lcConfig) << "Failed to write" << m_filePath;
+            qCWarning(lcConfig, "Failed to write %s", qUtf8Printable(m_filePath));
+            if (auto* root = qobject_cast<RootConfig*>(this))
+                Q_EMIT root->fileSaveFailed(QStringLiteral("Failed to open file for writing"));
             return;
         }
 
         auto json = m_sparse ? toSparseJsonObject() : toJsonObject();
         file.write(QJsonDocument(json).toJson(QJsonDocument::Indented));
+        if (auto* root = qobject_cast<RootConfig*>(this))
+            Q_EMIT root->fileSaved();
     });
 
     m_cooldownTimer->setSingleShot(true);
@@ -330,12 +334,12 @@ void ConfigObject::saveToFile() {
     m_cooldownTimer->start();
 }
 
-void ConfigObject::reloadFromFile() {
+bool ConfigObject::reloadFromFile() {
     QFile file(m_filePath);
 
     if (!file.open(QIODevice::ReadOnly)) {
-        qCDebug(lcConfig) << "Failed to open" << m_filePath;
-        return;
+        qCDebug(lcConfig, "Failed to open %s", qUtf8Printable(m_filePath));
+        return false;
     }
 
     QJsonParseError error{};
@@ -344,14 +348,15 @@ void ConfigObject::reloadFromFile() {
     if (error.error != QJsonParseError::NoError) {
         if (m_retryTimer && m_parseRetries < 3) {
             m_parseRetries++;
-            qCDebug(lcConfig, "Failed to parse %s: %s - retrying (%d/3)", qPrintable(m_filePath),
-                qPrintable(error.errorString()), m_parseRetries);
+            qCDebug(lcConfig, "Failed to parse %s: %s - retrying (%d/3)", qUtf8Printable(m_filePath),
+                qUtf8Printable(error.errorString()), m_parseRetries);
             m_retryTimer->start();
         } else {
-            qCWarning(lcConfig, "Failed to parse %s: %s", qPrintable(m_filePath), qPrintable(error.errorString()));
+            qCWarning(
+                lcConfig, "Failed to parse %s: %s", qUtf8Printable(m_filePath), qUtf8Printable(error.errorString()));
             m_parseRetries = 0;
         }
-        return;
+        return false;
     }
 
     m_parseRetries = 0;
@@ -366,6 +371,8 @@ void ConfigObject::reloadFromFile() {
         qCDebug(lcConfig) << "Re-syncing" << metaObject()->className() << "from global after reload";
         resyncFromGlobal();
     }
+
+    return true;
 }
 
 void ConfigObject::onFileChanged() {
@@ -376,8 +383,29 @@ void ConfigObject::onFileChanged() {
         m_parseRetries = 0;
         if (m_retryTimer)
             m_retryTimer->stop();
-        reloadFromFile();
+
+        bool ok = reloadFromFile();
+        if (auto* root = qobject_cast<RootConfig*>(this)) {
+            if (ok)
+                Q_EMIT root->fileLoaded();
+            else
+                Q_EMIT root->fileLoadFailed(QStringLiteral("Failed to load config file"));
+        }
     }
 }
 
+// RootConfig
+
+RootConfig::RootConfig(QObject* parent)
+    : ConfigObject(parent) {}
+
+void RootConfig::save() {
+    saveToFile();
+}
+
+void RootConfig::reload() {
+    if (reloadFromFile())
+        Q_EMIT fileLoaded();
+}
+
 } // namespace caelestia::config

plugin/src/Caelestia/Config/configobject.hpp

@@ -59,7 +59,7 @@ public:
     // automatic file watching, debounced saving, and reload.
     void setupFileBackend(const QString& path);
     void saveToFile();
-    void reloadFromFile();
+    bool reloadFromFile();
 
     // Per-monitor overlay support (Qt Resolve Mask pattern).
     // Eagerly syncs non-overridden properties from a global ConfigObject.
@@ -115,4 +115,21 @@ private:
     QTimer* m_batchTimer = nullptr;
 };
 
+// Intermediate base for singleton config roots (GlobalConfig, TokenConfig).
+// Provides save/reload with file lifecycle signals.
+class RootConfig : public ConfigObject {
+    Q_OBJECT
+
+public:
+    explicit RootConfig(QObject* parent = nullptr);
+
+    Q_INVOKABLE void save();
+    Q_INVOKABLE void reload();
+
+    Q_SIGNAL void fileLoaded();
+    Q_SIGNAL void fileLoadFailed(const QString& error);
+    Q_SIGNAL void fileSaved();
+    Q_SIGNAL void fileSaveFailed(const QString& error);
+};
+
 } // namespace caelestia::config

plugin/src/Caelestia/Config/tokens.cpp

@@ -18,7 +18,7 @@ QString configDir() {
 } // namespace
 
 TokenConfig::TokenConfig(QObject* parent)
-    : ConfigObject(parent)
+    : RootConfig(parent)
     , m_appearance(new AppearanceTokens(this))
     , m_bar(new BarTokens(this))
     , m_dashboard(new DashboardTokens(this))
@@ -41,7 +41,7 @@ TokenConfig::TokenConfig(QObject* parent)
 }
 
 TokenConfig::TokenConfig(TokenConfig* fallback, const QString& filePath, QObject* parent)
-    : ConfigObject(parent)
+    : RootConfig(parent)
     , m_appearance(new AppearanceTokens(this))
     , m_bar(new BarTokens(this))
     , m_dashboard(new DashboardTokens(this))
@@ -80,14 +80,6 @@ TokenConfig* TokenConfig::create(QQmlEngine* engine, QJSEngine*) {
     return new TokenConfig(engine);
 }
 
-void TokenConfig::save() {
-    saveToFile();
-}
-
-void TokenConfig::reload() {
-    reloadFromFile();
-}
-
 // Tokens (attached type)
 
 Tokens::Tokens(ConfigScope* scope, QObject* parent)

plugin/src/Caelestia/Config/tokens.hpp

@@ -289,7 +289,7 @@ public:
         : ConfigObject(parent) {}
 };
 
-class TokenConfig : public ConfigObject {
+class TokenConfig : public RootConfig {
     Q_OBJECT
     QML_ELEMENT
     QML_SINGLETON
@@ -312,9 +312,6 @@ public:
     [[nodiscard]] Q_INVOKABLE TokenConfig* defaults();
     static TokenConfig* create(QQmlEngine*, QJSEngine*);
 
-    Q_INVOKABLE void save();
-    Q_INVOKABLE void reload();
-
     ~TokenConfig() override;
 
 private: