Cards "תיקים פתוחים" and "דיונים השבוע" showed counts but clicking
revealed "אין פריטים להצגה" because card counts came from direct DB
queries while detail filtered from alerts with stricter criteria.
Added getOpenCaseItems() and getUpcomingHearingItems() to AlertCalculator,
included them in summary API response, and wired dashlet to use them.
Also: renamed extension to SmartAssistant, title to "שירה — עוזרת אישית".
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
chaim