SSE Patch 增量推送架构全链路实现

- web/sse_manager.py: asyncio.Queue 连接池 + broadcast + event_stream
- web/routers/sse_router.py: GET /api/events + POST /api/internal/collector-patch
- weather_sources.py: 采集后 POST patch 给 web
- Nginx polyweather.conf: /api/events proxy_buffering off
- frontend/api/events/route.ts: Next.js SSE 代理
- frontend/hooks/use-sse-patches.ts: EventSource + useLatestPatch + 重连
- LiveTemperatureThresholdChart: mergePatchIntoHourly 增量合并
- scan-terminal-query: 接入 SSE patch 更新行数据
- 新增 ssePatchArchitecture.test.ts 架构测试

deploy/nginx/polyweather.conf

@@ -29,6 +29,19 @@ server {
     proxy_buffers 8 16k;
     proxy_busy_buffers_size 32k;
 
+    location /api/events {
+        proxy_pass http://127.0.0.1:8000;
+        proxy_http_version 1.1;
+        proxy_buffering off;
+        proxy_cache off;
+        proxy_read_timeout 86400s;
+        proxy_set_header Connection '';
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+    }
+
     location / {
         proxy_pass http://127.0.0.1:8000;
         proxy_http_version 1.1;