Add Filter & Sort to Lovable App

Add filter and sort functionality to data views in my Lovable app.

REQUIREMENTS:
1. Add a filter sidebar (or collapsible panel on mobile) with filter controls matching the data columns: checkbox groups for categories, range sliders for numeric values, date pickers for date ranges, and text search for names.
2. Add a sort dropdown above the data grid with options: Newest, Oldest, Name A-Z, Name Z-A, Price Low-High, Price High-Low.
3. Sync all filter and sort state to URL search parameters so filtered views are shareable and bookmarkable.
4. Show active filter count as a badge on the filter button. Add a "Clear all filters" button.
5. Apply filters and sort to the Supabase query — filter server-side, not client-side.
6. Show the result count (e.g., "Showing 24 of 156 results").
7. Add filter chips above the results showing active filters with individual remove (X) buttons.
8. Debounce text and range filter inputs to avoid excessive queries.

DATABASE:
- No new tables. Filters applied to existing table queries.
- Add database indexes on commonly filtered columns for performance.

SECURITY:
- Validate filter values server-side to prevent SQL injection.
- Sanitize URL parameters before using in queries.