feat: 热点穿透题材数从50提升到100，支持缓存定向清理

- 热点穿透top由50提升到100(涨幅榜+热度榜各取前100合并)，保证题材数≥100
- themes.py graph路由top上限le由60放宽到200
- daily_collector HOTMAP_TOP_N同步到100与页面一致
- auvops.sh新增cache-clear-graph子命令定向清理theme_graph缓存

backend/auvops.sh

@@ -6,6 +6,7 @@
 #
 # 用法（容器内）:
 #   ./auvops.sh cache-clear            # 清空全部缓存（当日数据全新）
+#   ./auvops.sh cache-clear-graph      # 只清空热点穿透(theme_graph)缓存
 #   ./auvops.sh clean-expired          # 只清理已过期的缓存
 #   ./auvops.sh cache-count            # 查看缓存条数
 #   ./auvops.sh recollect [DATE]       # 删除并重采指定交易日（默认当天）
@@ -57,6 +58,22 @@ EOF
   echo "✅ 缓存已清空"
 }
 
+# 仅清空热点穿透(theme_graph)缓存：改写 top/排序后旧图数据过期，删掉让下次请求重建
+cmd_cache_clear_graph() {
+  echo "① 清空热点穿透(theme_graph)缓存"
+  "${PY}" - <<'EOF'
+from database import get_connection
+conn = get_connection()
+try:
+    cur = conn.execute("DELETE FROM cache WHERE key LIKE 'theme_graph:%'")
+    conn.commit()
+    print(f"  已删除 {cur.rowcount} 条 theme_graph 缓存")
+finally:
+    conn.close()
+EOF
+  echo "✅ 热点穿透缓存已清空"
+}
+
 # 只清理已过期缓存
 cmd_clean_expired() {
   echo "① 清理过期缓存"
@@ -138,6 +155,7 @@ main() {
   local cmd="$1"; shift
   case "${cmd}" in
     cache-clear|cc)    cmd_cache_clear "$@" ;;
+    cache-clear-graph) cmd_cache_clear_graph "$@" ;;
     clean-expired)     cmd_clean_expired "$@" ;;
     cache-count)       cmd_cache_count "$@" ;;
     recollect)         cmd_recollect "$@" ;;