ui: auto-persist factory blueprints, drop Save/Load buttons

Load blueprints.toml in the BlueprintPanel constructor and write it in the
destructor, matching the ship-layout blueprint lifecycle (startup load,
shutdown save, silent write errors, modal on parse failure). Removes the
Save/Load buttons and their slots. Implements REQ-UI-BLUEPRINT-SAVE/-LOAD/-PANEL.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VGNNLeFWhVzvxkK9qVXP2K

src/ui/BlueprintPanel.cpp

@@ -53,23 +53,15 @@ BlueprintPanel::BlueprintPanel(Simulation* sim, const GameConfig* config, QWidge
 
     connect(m_createBtn, &QPushButton::clicked, this, &BlueprintPanel::onCreateClicked);
 
-    QHBoxLayout* ioLayout = new QHBoxLayout();
+    loadFromDisk();
-    m_saveBtn = new QPushButton(tr("Save"), this);
+    rebuildButtons();
-    m_loadBtn = new QPushButton(tr("Load"), this);
-    m_saveBtn->setFixedHeight(36);
-    m_loadBtn->setFixedHeight(36);
-    ioLayout->addWidget(m_saveBtn);
-    ioLayout->addWidget(m_loadBtn);
-    layout->addLayout(ioLayout);
-
-    connect(m_saveBtn, &QPushButton::clicked, this, &BlueprintPanel::onSaveClicked);
-    connect(m_loadBtn, &QPushButton::clicked, this, &BlueprintPanel::onLoadClicked);
 
     registerForEvents();
 }
 
 BlueprintPanel::~BlueprintPanel()
 {
+    saveToDisk();
     unregisterForEvents();
 }
 
@@ -281,65 +273,35 @@ void BlueprintPanel::rebuildButtons()
     refreshButtonStates();
 }
 
-void BlueprintPanel::onSaveClicked()
+void BlueprintPanel::saveToDisk() const
 {
+    // Persist on shutdown; write errors are silently ignored (REQ-UI-BLUEPRINT-SAVE).
     const QString path = QCoreApplication::applicationDirPath() + "/blueprints.toml";
+    QFile file(path);
+    if (!file.open(QIODevice::WriteOnly | QIODevice::Text)) { return; }
     try
     {
         const std::string content = BlueprintSerializer::serialize(m_blueprints);
-        QFile file(path);
-        if (!file.open(QIODevice::WriteOnly | QIODevice::Text))
-        {
-            QMessageBox::critical(this, tr("Save Failed"),
-                tr("Could not open file for writing:\n%1").arg(path));
-            return;
-        }
         file.write(QByteArray::fromStdString(content));
     }
-    catch (const std::exception& e)
+    catch (...) {}
-    {
-        QMessageBox::critical(this, tr("Save Failed"),
-            tr("Failed to save blueprints:\n%1").arg(e.what()));
-    }
 }
 
-void BlueprintPanel::onLoadClicked()
+void BlueprintPanel::loadFromDisk()
 {
-    QMessageBox box(this);
+    // Load at startup (REQ-UI-BLUEPRINT-LOAD). Missing file: start empty, no error.
-    box.setWindowTitle(tr("Load Blueprints"));
-    box.setText(tr("Load blueprints? This will replace all current blueprints."));
-    QPushButton* confirmBtn = box.addButton(tr("Confirm"), QMessageBox::AcceptRole);
-    box.addButton(tr("Cancel"), QMessageBox::RejectRole);
-    box.exec();
-    if (box.clickedButton() != confirmBtn) { return; }
-
     const QString path = QCoreApplication::applicationDirPath() + "/blueprints.toml";
+    QFile file(path);
+    if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) { return; }
     try
     {
-        QFile file(path);
+        m_blueprints = BlueprintSerializer::deserialize(file.readAll().toStdString());
-        if (!file.open(QIODevice::ReadOnly | QIODevice::Text))
-        {
-            QMessageBox::critical(this, tr("Load Failed"),
-                tr("Could not open file:\n%1").arg(path));
-            return;
-        }
-        const std::string content = file.readAll().toStdString();
-        std::vector<Blueprint> loaded = BlueprintSerializer::deserialize(content);
-
-        if (m_activeIndex >= 0)
-        {
-            EventManager::getInstance()->sendEventImmediately(
-                std::make_shared<ExitBlueprintModeRequestedEvent>());
-            m_activeIndex = -1;
-        }
-
-        m_blueprints = std::move(loaded);
-        rebuildButtons();
     }
     catch (const std::exception& e)
     {
         QMessageBox::critical(this, tr("Load Failed"),
             tr("Failed to load blueprints:\n%1").arg(e.what()));
+        m_blueprints.clear();
     }
 }
 

src/ui/BlueprintPanel.h

@@ -38,8 +38,6 @@ private slots:
     void onCreateClicked();
     void onDeleteBlueprintClicked(int index);
     void onBlueprintButtonClicked(int index);
-    void onSaveClicked();
-    void onLoadClicked();
 
 private:
     void onSelectionChanged(const std::vector<BuildingId>& ids);
@@ -48,6 +46,8 @@ private:
     int       computeBlueprintCost(const Blueprint& bp) const;
     void      rebuildButtons();
     void      refreshButtonStates();
+    void      loadFromDisk();
+    void      saveToDisk() const;
 
     Simulation*               m_sim;
     const GameConfig*         m_config;
@@ -57,8 +57,6 @@ private:
     std::vector<Blueprint>    m_blueprints;
     std::vector<QPushButton*> m_blueprintButtons;
     QPushButton*              m_createBtn;
-    QPushButton*              m_saveBtn;
-    QPushButton*              m_loadBtn;
     QWidget*                  m_buttonsContainer;
     QVBoxLayout*              m_buttonsLayout;
 };