update

backend/models.py

@@ -68,3 +68,12 @@ class SuggestionResponse(BaseModel):
     example: str
     status: str
     created_at: str
+
+
+class TopicSuggestRequest(BaseModel):
+    problem: str = Field(min_length=1, max_length=2000)
+
+
+class TopicSuggestion(BaseModel):
+    title: str
+    reason: str