搜索功能加入

backend/app/schemas/event_schema.py

@@ -24,6 +24,16 @@ class UnifiedEventResponse(BaseModel):
     tags: List[str] = Field(default_factory=list)
 
 
+class TimelineDataPoint(BaseModel):
+    time_label: str
+    count: int
+    event_ids: List[int] = Field(default_factory=list)
+
+class SearchTimelineResponse(BaseModel):
+    keyword: str
+    timeline: List[TimelineDataPoint]
+    events: List[UnifiedEventResponse]
+
 class PaginatedUnifiedEventResponse(BaseModel):
     """分页包装：避免一次性返回全量数据"""
     total: int