fix: glossary selection respects target language — sort by source+target, reset on lang change, fix template import

- GlossarySelector: filteredGlossaries now sorts matching target_language
  first so FR→FA appears before FR→EN when translating to Persian
- GlossarySelector: toggle auto-select prefers glossary matching
  targetLang, falls back to first available
- useTranslationConfig: reset glossaryId when targetLang changes (was
  only resetting on sourceLang change)
- glossary_routes: set target_language from template data on import
  (was missing, defaulted to None/en)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/src/app/dashboard/translate/GlossarySelector.tsx

@@ -239,8 +239,15 @@ export function GlossarySelector({ sourceLang, targetLang, isPro, mode, glossary
     if (!filterByLang || sourceLang === 'auto') {
       return glossaries;
     }
-    return glossaries.filter(g => g.source_language === sourceLang);
-  }, [glossaries, filterByLang, sourceLang]);
+    return glossaries
+      .filter(g => g.source_language === sourceLang)
+      .sort((a, b) => {
+        // Glossaries matching source + target come first
+        const aMatch = a.target_language === targetLang ? 0 : 1;
+        const bMatch = b.target_language === targetLang ? 0 : 1;
+        return aMatch - bMatch;
+      });
+  }, [glossaries, filterByLang, sourceLang, targetLang]);
 
   const filteredTemplates = useMemo(() => {
     if (!filterByLang || sourceLang === 'auto') {
@@ -278,7 +285,9 @@ export function GlossarySelector({ sourceLang, targetLang, isPro, mode, glossary
               if (!nextVal) {
                 onChange(null);
               } else if (filteredGlossaries.length > 0 && !glossaryId) {
-                onChange(filteredGlossaries[0].id);
+                // Prefer glossary matching target language, fall back to first
+                const matching = filteredGlossaries.find(g => g.target_language === targetLang);
+                onChange(matching ? matching.id : filteredGlossaries[0].id);
               }
             }}
             className={cn(

frontend/src/app/dashboard/translate/useTranslationConfig.ts

@@ -80,10 +80,10 @@ export function useTranslationConfig(hasFile: boolean): UseTranslationConfigRetu
     }
   }, [settings.defaultTargetLanguage]); // eslint-disable-line react-hooks/exhaustive-deps
 
-  // Reset glossary selection when source language changes
+  // Reset glossary selection when source or target language changes
   useEffect(() => {
     setGlossaryId(null);
-  }, [sourceLang]); // eslint-disable-line react-hooks/exhaustive-deps
+  }, [sourceLang, targetLang]); // eslint-disable-line react-hooks/exhaustive-deps
 
   // Fetch available (admin-configured) providers
   useEffect(() => {

routes/glossary_routes.py

@@ -597,6 +597,7 @@ async def import_glossary_template(
                 user_id=user.id,
                 name=glossary_name,
                 source_language=template_data.get("source_lang", "fr"),
+                target_language=template_data.get("target_lang", "en"),
                 created_at=datetime.now(timezone.utc),
                 updated_at=datetime.now(timezone.utc),
             )