Fix boolean facet filtering in browser

Fixed bug where boolean facets (High Metal Content, High REE Content) showed
correct counts but returned no results when selected.

Issue: HTML data attributes convert all values to strings, so the boolean
value 'true' in the data was being compared to the string "true" from the
checkbox filter, causing comparison to fail.

Solution: Added type-aware filtering logic that converts boolean values to
strings before comparison when the facet type is 'boolean'.

Now users can successfully filter by:
- High Metal Content: true (960 media)
- High REE Content: true (913 media)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: realmarcin

app/index.html

@@ -413,14 +413,27 @@ <h2 style="font-size: 1.1rem;">Filters</h2>
                 for (const [facet, values] of Object.entries(selectedFilters)) {
                     if (values.length === 0) continue;
 
+                    // Get facet type from schema
+                    const facetConfig = window.searchSchema.facets.find(f => f.field === facet);
+                    const facetType = facetConfig ? facetConfig.type : 'string';
+
                     const recipeValue = recipe[facet];
+
                     if (Array.isArray(recipeValue)) {
                         if (!recipeValue.some(v => values.includes(v))) {
                             return false;
                         }
                     } else {
-                        if (!values.includes(recipeValue)) {
-                            return false;
+                        // For boolean facets, convert string values to booleans for comparison
+                        if (facetType === 'boolean') {
+                            const booleanRecipeValue = String(recipeValue);
+                            if (!values.includes(booleanRecipeValue)) {
+                                return false;
+                            }
+                        } else {
+                            if (!values.includes(recipeValue)) {
+                                return false;
+                            }
                         }
                     }
                 }