Add an error reporting path

Assisted-By: Claude Opus 4.7

Author: baconpaul

src/ui/six-sines-editor.cpp

@@ -1348,6 +1348,11 @@ void SixSinesEditor::initializeBaseSkin()
 
     if (auto manrope = typefaceFromResources("Manrope/static/Manrope-Regular.ttf"))
         style()->replaceFontsWithTypeface(manrope);
+    else
+        reportError("Font Load Failed",
+                    "Unable to load Manrope-Regular from the embedded font resources. "
+                    "Six Sines will fall back to the system default font, which has "
+                    "different metrics and may render at the wrong size.");
     style()->adjustFontHeight(2.0f);
     style()->setFontExtraKerningFactor(0.03f);
 
@@ -1381,6 +1386,19 @@ juce::Typeface::Ptr SixSinesEditor::typefaceFromResources(const std::string &rel
     }
 }
 
+void SixSinesEditor::reportError(const std::string &title, const std::string &msg)
+{
+    SXSNLOG("[ERROR] " << title << ": " << msg);
+    juce::MessageManager::callAsync(
+        [w = juce::Component::SafePointer(this), title, msg]()
+        {
+            if (!w)
+                return;
+            auto prompt = sst::jucegui::screens::AlertOrPrompt::Alert(title, msg);
+            w->displayModalOverlay(std::move(prompt));
+        });
+}
+
 void SixSinesEditor::setZoomFactor(float zf)
 {
     // SCLOG("Setting zoom factor to " << zf);

src/ui/six-sines-editor.h

@@ -169,6 +169,11 @@ struct SixSinesEditor : jcmp::WindowPanel, sst::jucegui::screens::ScreenHolder<S
     // typeface ownership outlived the JUCE shutdown sequence.
     juce::Typeface::Ptr typefaceFromResources(const std::string &relPath);
 
+    // Show a modal alert overlay with the given title and message. Display is
+    // deferred via the message manager so it is safe to call during editor
+    // construction (when bounds aren't yet set).
+    void reportError(const std::string &title, const std::string &msg);
+
   private:
     std::unordered_map<std::string, juce::Typeface::Ptr> typefaceCache;