feat(generator): render nametag subtitle as smaller non-bold RTF run

- subtitle now emitted as second run (\b0\fs50); main text unchanged (\fs84)
- slides without subtitle byte-identical to previous single-run output
- add NameTagSubtitleRtfTest

src/ProFileGenerator.php

@@ -189,7 +189,10 @@ final class ProFileGenerator
                 $elements[] = self::buildSlideElement('Orginal', (string) $slideData['text'], self::buildOriginalBounds());
                 $elements[] = self::buildSlideElement('Deutsch', (string) $slideData['translation'], self::buildTranslationBounds());
             } else {
-                $elements[] = self::buildSlideElement('Orginal', (string) $slideData['text']);
+                $subtitle = isset($slideData['subtitle']) && $slideData['subtitle'] !== null
+                    ? (string) $slideData['subtitle']
+                    : null;
+                $elements[] = self::buildSlideElement('Orginal', (string) $slideData['text'], null, $subtitle);
             }
         }
 
@@ -392,7 +395,7 @@ final class ProFileGenerator
         return $url;
     }
 
-    private static function buildSlideElement(string $name, string $text, ?Rect $bounds = null): SlideElement
+    private static function buildSlideElement(string $name, string $text, ?Rect $bounds = null, ?string $subtitle = null): SlideElement
     {
         $graphicsElement = new GraphicsElement();
         $graphicsElement->setUuid(self::newUuid());
@@ -406,7 +409,7 @@ final class ProFileGenerator
         $graphicsElement->setFeather(self::buildFeather());
 
         $graphicsText = new Text();
-        $graphicsText->setRtfData(self::buildRtf($text));
+        $graphicsText->setRtfData(self::buildRtf($text, $subtitle));
         $graphicsText->setVerticalAlignment(VerticalAlignment::VERTICAL_ALIGNMENT_MIDDLE);
         $graphicsElement->setText($graphicsText);
 
@@ -635,11 +638,23 @@ final class ProFileGenerator
         $presentation->setCcli($metadata);
     }
 
-    private static function buildRtf(string $text): string
+    private static function buildRtf(string $text, ?string $subtitle = null): string
     {
         $encodedText = self::encodePlainTextForRtf($text);
 
-        return str_replace('ENCODED_TEXT_HERE', $encodedText, <<<'RTF'
+        // Main text: \fs84. When a subtitle is provided, append it as a second
+        // run on a new line that is explicitly non-bold (\b0) and smaller (\fs50,
+        // ~60% of 84). Slides without a subtitle stay a single \fs84 run and the
+        // exact byte output is identical to the previous single-run template.
+        $body = '\fs84 \cf2 \CocoaLigature0 '.$encodedText;
+
+        if ($subtitle !== null && trim($subtitle) !== '') {
+            $encodedSubtitle = self::encodePlainTextForRtf($subtitle);
+            $body .= '\
+'.'\b0\fs50 '.$encodedSubtitle;
+        }
+
+        return str_replace('BODY_HERE', $body, <<<'RTF'
 {\rtf1\ansi\ansicpg1252\cocoartf2761
 \cocoatextscaling0\cocoaplatform0{\fonttbl\f0\fnil\fcharset0 HelveticaNeue;}
 {\colortbl;\red255\green255\blue255;\red255\green255\blue255;}
@@ -647,7 +662,7 @@ final class ProFileGenerator
 \deftab1680
 \pard\pardeftab1680\pardirnatural\qc\partightenfactor0
 
-\f0\fs84 \cf2 \CocoaLigature0 ENCODED_TEXT_HERE}
+\f0BODY_HERE}
 RTF);
     }
 

tests/NameTagSubtitleRtfTest.php

@@ -0,0 +1,101 @@
+<?php
+
+declare(strict_types=1);
+
+namespace ProPresenter\Parser\Tests;
+
+use PHPUnit\Framework\Attributes\Test;
+use PHPUnit\Framework\TestCase;
+use ProPresenter\Parser\ProFileGenerator;
+
+final class NameTagSubtitleRtfTest extends TestCase
+{
+    /**
+     * Pull the RTF data of the first slide's first text element.
+     */
+    private function firstSlideRtf(array $slideData): string
+    {
+        $song = ProFileGenerator::generate(
+            'Subtitle Test',
+            [
+                [
+                    'name' => 'V1',
+                    'color' => [0, 0, 0, 1],
+                    'slides' => [$slideData],
+                ],
+            ],
+            [
+                ['name' => 'normal', 'groupNames' => ['V1']],
+            ],
+        );
+
+        $cue = $song->getPresentation()->getCues()[0];
+        $baseSlide = $cue->getActions()[0]->getSlide()->getPresentation()->getBaseSlide();
+        $elements = $baseSlide->getElements();
+
+        $this->assertNotEmpty($elements, 'Slide must have at least one element');
+
+        return $elements[0]->getElement()->getText()->getRtfData();
+    }
+
+    #[Test]
+    public function subtitle_renders_as_separate_non_bold_smaller_run(): void
+    {
+        $rtf = $this->firstSlideRtf([
+            'text' => 'Max Mustermann',
+            'subtitle' => 'Moderation',
+        ]);
+
+        // Main text keeps \fs84.
+        $this->assertStringContainsString('\fs84', $rtf);
+        $this->assertStringContainsString('Max Mustermann', $rtf);
+
+        // Subtitle is a separate run that is explicitly non-bold (\b0) and smaller (\fs50).
+        $this->assertStringContainsString('\b0\fs50', $rtf);
+        $this->assertStringContainsString('Moderation', $rtf);
+
+        // The subtitle run must come after the main text.
+        $this->assertLessThan(
+            strpos($rtf, '\b0\fs50'),
+            strpos($rtf, 'Max Mustermann'),
+            'Main text must precede the subtitle run',
+        );
+
+        // The subtitle run must follow the main \fs84 run.
+        $this->assertLessThan(
+            strpos($rtf, '\b0\fs50'),
+            strpos($rtf, '\fs84'),
+            '\fs84 main run must precede the \fs50 subtitle run',
+        );
+    }
+
+    #[Test]
+    public function slide_without_subtitle_is_unchanged_single_run(): void
+    {
+        $rtf = $this->firstSlideRtf([
+            'text' => 'Max Mustermann',
+        ]);
+
+        // Exact single-run body identical to the legacy output.
+        $this->assertStringContainsString(
+            '\f0\fs84 \cf2 \CocoaLigature0 Max Mustermann',
+            $rtf,
+        );
+
+        // No subtitle styling leaks into lyric/plain slides.
+        $this->assertStringNotContainsString('\b0', $rtf);
+        $this->assertStringNotContainsString('\fs50', $rtf);
+    }
+
+    #[Test]
+    public function empty_subtitle_is_treated_as_no_subtitle(): void
+    {
+        $rtf = $this->firstSlideRtf([
+            'text' => 'Max Mustermann',
+            'subtitle' => '   ',
+        ]);
+
+        $this->assertStringNotContainsString('\b0', $rtf);
+        $this->assertStringNotContainsString('\fs50', $rtf);
+    }
+}