feat(glossaries): add target_language support - DB migration, API, and UI language pair display

schemas/glossary_schemas.py

@@ -46,6 +46,9 @@ class GlossaryCreate(BaseModel):
     source_language: str = Field(
         default="fr", max_length=10, description="Langue source (ISO code)"
     )
+    target_language: str = Field(
+        default="en", max_length=10, description="Langue cible (ISO code)"
+    )
     terms: list[GlossaryTermCreate] = Field(
         default_factory=list, description="Liste des termes"
     )
@@ -61,6 +64,7 @@ class GlossaryUpdate(BaseModel):
 
     name: Optional[str] = Field(None, min_length=1, max_length=255)
     source_language: Optional[str] = Field(None, max_length=10)
+    target_language: Optional[str] = Field(None, max_length=10)
     terms: Optional[list[GlossaryTermCreate]] = Field(None)
 
     @field_validator("name")
@@ -75,6 +79,7 @@ class GlossaryResponse(BaseModel):
     id: str
     name: str
     source_language: str = "fr"
+    target_language: str = "en"
     terms: list[GlossaryTermResponse] = []
     created_at: Optional[datetime] = None
     updated_at: Optional[datetime] = None
@@ -88,6 +93,7 @@ class GlossaryListItem(BaseModel):
     id: str
     name: str
     source_language: str = "fr"
+    target_language: str = "en"
     terms_count: int = Field(
         default=0, description="Nombre de termes dans le glossaire"
     )