feat(merge-split): add EN and DE localization strings for merge group

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/renderer-locale-de.ts

@@ -195,6 +195,17 @@ const UI_TEXT_DE = {
         success: 'Videos erfolgreich zusammengefugt!',
         failed: 'Fehler beim Zusammenfugen der Videos.'
     },
+    mergeGroup: {
+        btn: 'Zusammenfugen & Splitten',
+        phaseDownloading: 'VOD wird heruntergeladen',
+        phaseMerging: 'Zusammenfugen...',
+        phaseSplitting: 'Part wird erstellt',
+        phaseCleanup: 'Aufraumen...',
+        needMinTwo: 'Mindestens 2 VODs auswahlen',
+        titleTwo: 'Merge: {title1} + {title2}',
+        titleMany: 'Merge: {title1} + {count} weitere',
+        metaLabel: '{count} VODs',
+    },
     updates: {
         bannerDefault: 'Neue Version verfugbar!',
         latest: 'Du hast die neueste Version!',

src/renderer-locale-en.ts

@@ -195,6 +195,17 @@ const UI_TEXT_EN = {
         success: 'Videos merged successfully!',
         failed: 'Failed to merge videos.'
     },
+    mergeGroup: {
+        btn: 'Merge & Split',
+        phaseDownloading: 'Downloading VOD',
+        phaseMerging: 'Merging...',
+        phaseSplitting: 'Splitting Part',
+        phaseCleanup: 'Cleaning up...',
+        needMinTwo: 'Select at least 2 VODs',
+        titleTwo: 'Merge: {title1} + {title2}',
+        titleMany: 'Merge: {title1} + {count} more',
+        metaLabel: '{count} VODs',
+    },
     updates: {
         bannerDefault: 'New version available!',
         latest: 'You are on the latest version!',