fix: exclude resolved problems from new-in-24h metrics (0.9.7)

Dashboard and created_within_hours list only show open/acknowledged problems
created in the last 24 hours; closed items appear under resolved only.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/version.ts

@@ -1,4 +1,4 @@
 /** Fallback до загрузки /health; при релизе держите в sync с backend/app/version.py */
 export const APP_NAME = "Security Alert Center";
-export const APP_VERSION = "0.9.6";
+export const APP_VERSION = "0.9.7";
 export const APP_VERSION_LABEL = `${APP_NAME} v.${APP_VERSION}`;