move compress.grayscale.label to section #compress (#3048)

# Description of Changes

Please provide a summary of the changes, including:

- What was changed
- Why the change was made
- Any challenges encountered

Closes #(issue_number)

---

## Checklist

### General

- [x] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [x] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md)
(if applicable)
- [x] I have performed a self-review of my own code
- [x] My changes generate no new warnings

### Documentation

- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### UI Changes (if applicable)

- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [ ] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md#6-testing)
for more details.

src/main/resources/messages_ar_AR.properties

@@ -951,6 +951,7 @@ fileToPDF.submit=تحويل إلى PDF
 compress.title=ضغط
 compress.header=ضغط ملف PDF
 compress.credit=تستخدم هذه الخدمة qpdf لضغط / تحسين PDF.
+compress.grayscale.label=تطبيق التدرج الرمادي للضغط
 compress.selectText.1=الوضع اليدوي - من 1 إلى 5
 compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
 compress.selectText.2=مستوى التحسين:
@@ -1384,4 +1385,3 @@ validateSignature.cert.version=Version
 validateSignature.cert.keyUsage=Key Usage
 validateSignature.cert.selfSigned=Self-Signed
 validateSignature.cert.bits=bits
-compress.grayscale.label=تطبيق التدرج الرمادي للضغط

src/main/resources/messages_az_AZ.properties

@@ -951,6 +951,7 @@ fileToPDF.submit=PDF-ə Çevir
 compress.title=Sıxışdır
 compress.header=PDF-i Sıxışdır
 compress.credit=Bu servis PDF sıxışdırılması/Optimizasiyası üçün Ghostscript istifadə edir.
+compress.grayscale.label=Sıxma üçün Boz Rəng Tətbiq Edin
 compress.selectText.1=Manual Mod - 1-dən 5-ə
 compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
 compress.selectText.2=Optimizasiya səviyyəsi:
@@ -1384,4 +1385,3 @@ validateSignature.cert.version=Version
 validateSignature.cert.keyUsage=Key Usage
 validateSignature.cert.selfSigned=Self-Signed
 validateSignature.cert.bits=bits
-compress.grayscale.label=Sıxma üçün Boz Rəng Tətbiq Edin

src/main/resources/messages_bg_BG.properties

@@ -951,6 +951,7 @@ fileToPDF.submit=Преобразуване към PDF
 compress.title=Компресиране
 compress.header=Компресиране на PDF
 compress.credit=Тази услуга използва qpdf за PDF компресиране/оптимизиране.
+compress.grayscale.label=Приложи сива скала за компресиране
 compress.selectText.1=Ръчен режим - от 1 до 5
 compress.selectText.1.1=При нива на оптимизация от 6 до 9, в допълнение към общото компресиране на PDF, резолюцията на изображението се намалява, за да се намали допълнително размерът на файла. По-високите нива водят до по-силна компресия на изображенията (до 50% от оригиналния размер), като се постига по-голямо намаляване на размера, но с потенциална загуба на качество на изображенията.
 compress.selectText.2=Ниво на оптимизация:
@@ -1384,4 +1385,3 @@ validateSignature.cert.version=Версия
 validateSignature.cert.keyUsage=Предназначение на ключа за използване
 validateSignature.cert.selfSigned=Самостоятелно подписан
 validateSignature.cert.bits=битове
-compress.grayscale.label=Приложи сива скала за компресиране

src/main/resources/messages_ca_CA.properties

@@ -951,6 +951,7 @@ fileToPDF.submit=Converteix a PDF
 compress.title=Comprimir
 compress.header=Comprimir PDF
 compress.credit=Aquest servei utilitza qpdf per a la compressió/optimització de PDF.
+compress.grayscale.label=Aplicar escala de grisos per a la compressió
 compress.selectText.1=Mode manual: de l'1 al 5
 compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
 compress.selectText.2=Nivell d'optimització:
@@ -1384,4 +1385,3 @@ validateSignature.cert.version=Version
 validateSignature.cert.keyUsage=Key Usage
 validateSignature.cert.selfSigned=Self-Signed
 validateSignature.cert.bits=bits
-compress.grayscale.label=Aplicar escala de grisos per a la compressió

src/main/resources/messages_cs_CZ.properties

@@ -951,6 +951,7 @@ fileToPDF.submit=Převést na PDF
 compress.title=Komprimovat
 compress.header=Komprimovat PDF
 compress.credit=Tato služba používá qpdf pro kompresi/optimalizaci PDF.
+compress.grayscale.label=Použít stupnici šedi pro kompresi
 compress.selectText.1=Ruční režim - Od 1 do 5
 compress.selectText.1.1=V úrovních optimalizace 6 až 9 je kromě obecné komprese PDF sníženo rozlišení obrázků pro další zmenšení velikosti souboru. Vyšší úrovně vedou k silnější kompresi obrázků (až na 50 % původní velikosti), čímž dosahují většího zmenšení velikosti, ale s potenciální ztrátou kvality obrázků.
 compress.selectText.2=Úroveň optimalizace:
@@ -1384,4 +1385,3 @@ validateSignature.cert.version=Verze
 validateSignature.cert.keyUsage=Použití klíče
 validateSignature.cert.selfSigned=Podepsaný sám sebou
 validateSignature.cert.bits=bitů
-compress.grayscale.label=Použít stupnici šedi pro kompresi

src/main/resources/messages_da_DK.properties

@@ -951,6 +951,7 @@ fileToPDF.submit=Konvertér til PDF
 compress.title=Komprimer
 compress.header=Komprimer PDF
 compress.credit=Denne tjeneste bruger qpdf til PDF Komprimering/Optimering.
+compress.grayscale.label=Anvend gråskala til komprimering
 compress.selectText.1=Manuel Tilstand - Fra 1 til 5
 compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
 compress.selectText.2=Optimeringsniveau:
@@ -1384,4 +1385,3 @@ validateSignature.cert.version=Version
 validateSignature.cert.keyUsage=Key Usage
 validateSignature.cert.selfSigned=Self-Signed
 validateSignature.cert.bits=bits
-compress.grayscale.label=Anvend gråskala til komprimering

src/main/resources/messages_de_DE.properties

@@ -951,6 +951,7 @@ fileToPDF.submit=In PDF konvertieren
 compress.title=Komprimieren
 compress.header=PDF komprimieren
 compress.credit=Dieser Dienst verwendet qpdf für die PDF-Komprimierung/-Optimierung.
+compress.grayscale.label=Graustufen für Komprimierung anwenden
 compress.selectText.1=Manueller Modus – Von 1 bis 5
 compress.selectText.1.1=In den Optimierungsstufen 6 bis 9 wird zusätzlich zur allgemeinen PDF-Komprimierung die Bildauflösung reduziert, um die Dateigröße weiter zu verringern. Höhere Stufen führen zu einer stärkeren Bildkomprimierung (bis zu 50 % der Originalgröße), wodurch eine stärkere Größenreduzierung erreicht wird, die jedoch mit einem möglichen Qualitätsverlust der Bilder einhergeht.
 compress.selectText.2=Optimierungsstufe:
@@ -1384,4 +1385,3 @@ validateSignature.cert.version=Version
 validateSignature.cert.keyUsage=Schlüsselverwendung
 validateSignature.cert.selfSigned=Selbstsigniert
 validateSignature.cert.bits=bits
-compress.grayscale.label=Graustufen für Komprimierung anwenden

src/main/resources/messages_el_GR.properties

@@ -951,6 +951,7 @@ fileToPDF.submit=Μετατροπή σε PDF
 compress.title=Συμπίεση
 compress.header=Συμπίεση PDF
 compress.credit=Αυτή η υπηρεσία χρησιμοποιεί qpdf για συμπίεση/βελτιστοποίηση PDF.
+compress.grayscale.label=Εφαρμογή κλίμακας του γκρι για συμπίεση
 compress.selectText.1=Χειροκίνητη λειτουργία - Από 1 έως 5
 compress.selectText.1.1=Στα επίπεδα βελτιστοποίησης 6 έως 9, εκτός από τη γενική συμπίεση PDF, η ανάλυση εικόνας μειώνεται για περαιτέρω μείωση του μεγέθους αρχείου. Υψηλότερα επίπεδα οδηγούν σε ισχυρότερη συμπίεση εικόνας (έως και 50% του αρχικού μεγέθους), επιτυγχάνοντας μεγαλύτερη μείωση μεγέθους αλλά με πιθανή απώλεια ποιότητας στις εικόνες.
 compress.selectText.2=Επίπεδο βελτιστοποίησης:
@@ -1384,4 +1385,3 @@ validateSignature.cert.version=Έκδοση
 validateSignature.cert.keyUsage=Χρήση κλειδιού
 validateSignature.cert.selfSigned=Αυτο-υπογεγραμμένο
 validateSignature.cert.bits=bits
-compress.grayscale.label=Εφαρμογή κλίμακας του γκρι για συμπίεση

src/main/resources/messages_en_GB.properties

@@ -951,6 +951,7 @@ fileToPDF.submit=Convert to PDF
 compress.title=Compress
 compress.header=Compress PDF
 compress.credit=This service uses qpdf for PDF Compress/Optimisation.
+compress.grayscale.label=Apply Grayscale for Compression
 compress.selectText.1=Manual Mode - From 1 to 5
 compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
 compress.selectText.2=Optimisation level:
@@ -1384,4 +1385,3 @@ validateSignature.cert.version=Version
 validateSignature.cert.keyUsage=Key Usage
 validateSignature.cert.selfSigned=Self-Signed
 validateSignature.cert.bits=bits
-compress.grayscale.label=Apply Grayscale for Compression

src/main/resources/messages_en_US.properties

@@ -951,6 +951,7 @@ fileToPDF.submit=Convert to PDF
 compress.title=Compress
 compress.header=Compress PDF
 compress.credit=This service uses qpdf for PDF Compress/Optimisation.
+compress.grayscale.label=Apply Grayscale for Compression
 compress.selectText.1=Manual Mode - From 1 to 5
 compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
 compress.selectText.2=Optimization level:
@@ -1384,4 +1385,3 @@ validateSignature.cert.version=Version
 validateSignature.cert.keyUsage=Key Usage
 validateSignature.cert.selfSigned=Self-Signed
 validateSignature.cert.bits=bits
-compress.grayscale.label=Apply Grayscale for Compression

src/main/resources/messages_es_ES.properties

@@ -951,6 +951,7 @@ fileToPDF.submit=Convertir a PDF
 compress.title=Comprimir
 compress.header=Comprimir PDF
 compress.credit=Este servicio utiliza qpdf para compresión/optimización de PDF
+compress.grayscale.label=Aplicar escala de grises para compresión
 compress.selectText.1=Modo manual - De 1 a 5
 compress.selectText.1.1=En los niveles de optimización 6 a 9, además de la compresión general de PDF, se reduce la resolución de la imagen para reducir aún más el tamaño del archivo. Los niveles más altos dan como resultado una mayor compresión de la imagen (hasta el 50 % del tamaño original), lo que permite lograr una mayor reducción del tamaño, pero con una posible pérdida de calidad en las imágenes.
 compress.selectText.2=Nivel de optimización:
@@ -1384,4 +1385,3 @@ validateSignature.cert.version=Versión
 validateSignature.cert.keyUsage=Uso de la llave
 validateSignature.cert.selfSigned=Autofirmado
 validateSignature.cert.bits=bits
-compress.grayscale.label=Aplicar escala de grises para compresión

src/main/resources/messages_eu_ES.properties

@@ -951,6 +951,7 @@ fileToPDF.submit=PDF bihurtu
 compress.title=Konprimatu
 compress.header=PDFa konprimatu
 compress.credit=Zerbitzu honek qpdf erabiltzen du PDFak komprimatzeko/optimizatzeko
+compress.grayscale.label=Aplikatu grisezko eskala konpresiorako
 compress.selectText.1=Eskuz 1etik 5ra
 compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
 compress.selectText.2=Optimizazio maila:
@@ -1384,4 +1385,3 @@ validateSignature.cert.version=Version
 validateSignature.cert.keyUsage=Key Usage
 validateSignature.cert.selfSigned=Self-Signed
 validateSignature.cert.bits=bits
-compress.grayscale.label=Aplikatu grisezko eskala konpresiorako

src/main/resources/messages_fa_IR.properties

@@ -951,6 +951,7 @@ fileToPDF.submit=تبدیل به PDF
 compress.title=فشرده‌سازی
 compress.header=فشرده‌سازی PDF
 compress.credit=این سرویس از qpdf برای فشرده‌سازی / بهینه‌سازی PDF استفاده می‌کند.
+compress.grayscale.label=اعمال مقیاس خاکستری برای فشرده‌سازی
 compress.selectText.1=حالت دستی - از 1 تا 5
 compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
 compress.selectText.2=سطح بهینه‌سازی:
@@ -1384,4 +1385,3 @@ validateSignature.cert.version=نسخه
 validateSignature.cert.keyUsage=کاربرد کلید
 validateSignature.cert.selfSigned=با امضای خود
 validateSignature.cert.bits=بیت‌ها
-compress.grayscale.label=اعمال مقیاس خاکستری برای فشرده‌سازی

src/main/resources/messages_fr_FR.properties

@@ -951,6 +951,7 @@ fileToPDF.submit=Convertir
 compress.title=Compresser un PDF
 compress.header=Compresser un PDF (lorsque c'est possible!)
 compress.credit=Ce service utilise qpdf pour la compression et l'optimisation des PDF.
+compress.grayscale.label=Appliquer l'échelle de gris pour la compression
 compress.selectText.1=Mode manuel – de 1 à 5
 compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
 compress.selectText.2=Niveau d'optimisation
@@ -1384,4 +1385,3 @@ validateSignature.cert.version=Version
 validateSignature.cert.keyUsage=Usage de la clé
 validateSignature.cert.selfSigned=Auto-signé
 validateSignature.cert.bits=bits
-compress.grayscale.label=Appliquer l'échelle de gris pour la compression

src/main/resources/messages_ga_IE.properties

@@ -951,6 +951,7 @@ fileToPDF.submit=Tiontaigh go PDF
 compress.title=Comhbhrúigh
 compress.header=Comhbhrúigh PDF
 compress.credit=Úsáideann an tseirbhís seo qpdf le haghaidh Comhbhrú/Optimization PDF.
+compress.grayscale.label=Cuir Scála Liath i bhFeidhm le Comhbhrú
 compress.selectText.1=Mód Láimhe - Ó 1 go 5
 compress.selectText.1.1=I leibhéil optamaithe 6 go 9, chomh maith le comhbhrú ginearálta PDF, déantar réiteach íomhá a laghdú de réir scála chun méid comhaid a laghdú tuilleadh. Mar thoradh ar leibhéil níos airde tá comhbhrú íomhá níos láidre (suas le 50% den mhéid bunaidh), ag baint amach laghdú méide níos mó ach le caillteanas cáilíochta féideartha in íomhánna.
 compress.selectText.2=Leibhéal optamaithe:
@@ -1384,4 +1385,3 @@ validateSignature.cert.version=Leagan
 validateSignature.cert.keyUsage=Úsáid Eochrach
 validateSignature.cert.selfSigned=Féin-Sínithe
 validateSignature.cert.bits=giotáin
-compress.grayscale.label=Cuir Scála Liath i bhFeidhm le Comhbhrú

src/main/resources/messages_hi_IN.properties

@@ -951,6 +951,7 @@ fileToPDF.submit=PDF में बदलें
 compress.title=कम्प्रेस
 compress.header=PDF कम्प्रेस करें
 compress.credit=यह सेवा PDF कम्प्रेस/अनुकूलन के लिए qpdf का उपयोग करती है।
+compress.grayscale.label=संपीड़न के लिए ग्रेस्केल लागू करें
 compress.selectText.1=मैनुअल मोड - स्तर 1 से 4
 compress.selectText.1.1=अनुकूलन स्तर 6 से 9 में, सामान्य PDF कम्प्रेसन के अतिरिक्त, फ़ाइल आकार को और कम करने के लिए छवि रेज़ोल्यूशन को कम किया जाता है। उच्च स्तर पर छवियों का अधिक कम्प्रेसन होता है (मूल आकार का 50% तक), जिससे आकार में अधिक कमी आती है लेकिन छवियों की गुणवत्ता प्रभावित हो सकती है।
 compress.selectText.2=अनुकूलन स्तर:
@@ -1384,4 +1385,3 @@ validateSignature.cert.version=संस्करण
 validateSignature.cert.keyUsage=कुंजी उपयोग
 validateSignature.cert.selfSigned=स्व-हस्ताक्षरित
 validateSignature.cert.bits=बिट्स
-compress.grayscale.label=संपीड़न के लिए ग्रेस्केल लागू करें

src/main/resources/messages_hr_HR.properties

@@ -951,6 +951,7 @@ fileToPDF.submit=Pretvori u PDF
 compress.title=Komprimirajte
 compress.header=Komprimirajte PDF
 compress.credit=Ova usluga koristi qpdf za komprimiranje / optimizaciju PDF-a.
+compress.grayscale.label=Primijeni sivinu za kompresiju
 compress.selectText.1=Ručni režim - Od 1 do 5
 compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
 compress.selectText.2=Nivo optimizacije:
@@ -1384,4 +1385,3 @@ validateSignature.cert.version=Version
 validateSignature.cert.keyUsage=Key Usage
 validateSignature.cert.selfSigned=Self-Signed
 validateSignature.cert.bits=bits
-compress.grayscale.label=Primijeni sivinu za kompresiju

src/main/resources/messages_hu_HU.properties

@@ -951,6 +951,7 @@ fileToPDF.submit=Konvertálás PDF-be
 compress.title=Tömörítés
 compress.header=PDF tömörítése
 compress.credit=Ez a szolgáltatás a qpdf használatával végzi a PDF tömörítését/optimalizálását.
+compress.grayscale.label=Szürkeárnyalatok alkalmazása tömörítéshez
 compress.selectText.1=Kézi mód - 1-től 5-ig
 compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
 compress.selectText.2=Optimalizálási szint:
@@ -1384,4 +1385,3 @@ validateSignature.cert.version=Verzió
 validateSignature.cert.keyUsage=Kulcshasználat
 validateSignature.cert.selfSigned=Önaláírt
 validateSignature.cert.bits=bit
-compress.grayscale.label=Szürkeárnyalatok alkalmazása tömörítéshez

src/main/resources/messages_id_ID.properties

@@ -951,6 +951,7 @@ fileToPDF.submit=Konversi ke PDF
 compress.title=Kompres
 compress.header=Kompres PDF
 compress.credit=Layanan ini menggunakan qpdf untuk Kompresi/Optimalisasi PDF.
+compress.grayscale.label=Terapkan Skala Abu-Abu untuk Kompresi
 compress.selectText.1=Mode Manual - Dari 1 hingga 5
 compress.selectText.1.1=In optimization levels 6 to 9, in addition to general PDF compression, image resolution is scaled down to further reduce file size. Higher levels result in stronger image compression (up to 50% of the original size), achieving greater size reduction but with potential quality loss in images.
 compress.selectText.2=Tingkat Optimalisasi:
@@ -1384,4 +1385,3 @@ validateSignature.cert.version=Version
 validateSignature.cert.keyUsage=Key Usage
 validateSignature.cert.selfSigned=Self-Signed
 validateSignature.cert.bits=bits
-compress.grayscale.label=Terapkan Skala Abu-Abu untuk Kompresi