Andrew Charlwood cd15ab6cdf feat: implement filter logic with reactive KPI updates (Task 3.3) ...

- Add apply_filters() method that queries SQLite with current filter state
- Handle initiated date filter (first intervention date range)
- Handle last seen date filter (last intervention date range)
- Handle drug and directorate multi-select filters
- Use CTE pattern for efficient patient-level date filtering
- Update KPI values (unique_patients, total_drugs, total_cost) on filter change
- Call apply_filters() from all filter event handlers
- Call apply_filters() after initial data load

2026-02-04 14:17:27 +00:00

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