Fix data directory dialog appearing on every startup

Moved setOrganizationName/setApplicationName calls BEFORE
IntroDialog::pickDataDirectory() so QSettings knows where to save the
user's data directory choice.

Previously, QSettings was created without org/app names set, causing
the "strDataDir" setting to be lost, forcing the dialog to appear on
every startup.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

src/qt/triangles.cpp

@@ -132,6 +132,14 @@ int main(int argc, char *argv[])
     // Command-line options take precedence:
     ParseParameters(argc, argv);
 
+    // Application identification (must be set before IntroDialog uses QSettings)
+    app.setOrganizationName("Triangles");
+    //XXX app.setOrganizationDomain("");
+    if(GetBoolArg("-testnet")) // Separate UI settings for testnet
+        app.setApplicationName("Triangles-Qt-testnet");
+    else
+        app.setApplicationName("Triangles-Qt");
+
     // Show data directory selection dialog on first run (unless -datadir was passed)
     if (!IntroDialog::pickDataDirectory())
         return 0;
@@ -147,15 +155,6 @@ int main(int argc, char *argv[])
     }
     ReadConfigFile(mapArgs, mapMultiArgs);
 
-    // Application identification (must be set before OptionsModel is initialized,
-    // as it is used to locate QSettings)
-    app.setOrganizationName("Triangles");
-    //XXX app.setOrganizationDomain("");
-    if(GetBoolArg("-testnet")) // Separate UI settings for testnet
-        app.setApplicationName("Triangles-Qt-testnet");
-    else
-        app.setApplicationName("Triangles-Qt");
-
     // ... then GUI settings:
     OptionsModel optionsModel;