feat: test coverage for utils

src/features/FilterFonts/index.ts

@@ -1,5 +1,11 @@
-export { categoryFilterStore } from './model/stores/categoryFilterStore';
+export {
-export { providersFilterStore } from './model/stores/providersFilterStore';
+    createFilterManager,
-export { subsetsFilterStore } from './model/stores/subsetsFilterStore';
+    type FilterManager,
-
+} from './lib/filterManager/filterManager.svelte';
-export { clearAllFilters } from './model/services/clearAllFilters/clearAllFilters';
+export {
+    FONT_CATEGORIES,
+    FONT_PROVIDERS,
+    FONT_SUBSETS,
+} from './model/const/const';
+export type { FilterGroupConfig } from './model/const/types/common';
+export { filterManager } from './model/state/manager.svelte';

src/features/FilterFonts/lib/filterManager/filterManager.svelte.ts

@@ -0,0 +1,45 @@
+import { createFilter } from '$shared/lib';
+import type { FilterGroupConfig } from '../../model/const/types/common';
+
+/**
+ * Create a filter manager instance.
+ */
+export function createFilterManager(configs: FilterGroupConfig[]) {
+    // Create filter instances upfront
+    const groups = $state(
+        configs.map(config => ({
+            id: config.id,
+            label: config.label,
+            instance: createFilter({ properties: config.properties }),
+        })),
+    );
+
+    // Derived: any selection across all groups
+    const hasAnySelection = $derived(
+        groups.some(group => group.instance.selectedProperties.length > 0),
+    );
+
+    return {
+        // Direct array reference (reactive)
+        get groups() {
+            return groups;
+        },
+
+        // Derived values
+        get hasAnySelection() {
+            return hasAnySelection;
+        },
+
+        // Global action
+        deselectAllGlobal: () => {
+            groups.forEach(group => group.instance.deselectAll());
+        },
+
+        // Helper to get group by id
+        getGroup: (id: string) => {
+            return groups.find(g => g.id === id);
+        },
+    };
+}
+
+export type FilterManager = ReturnType<typeof createFilterManager>;

src/features/FilterFonts/model/const/const.ts

@@ -1,4 +1,4 @@
-import type { Property } from '$shared/lib/store/createFilterStore/createFilterStore';
+import type { Property } from '$shared/lib/store';
 
 export const FONT_CATEGORIES: Property[] = [
     {

src/features/FilterFonts/model/const/types/common.ts

@@ -0,0 +1,7 @@
+import type { Property } from '$shared/lib';
+
+export interface FilterGroupConfig {
+    id: string;
+    label: string;
+    properties: Property[];
+}

src/features/FilterFonts/model/services/clearAllFilters/clearAllFilters.ts

@@ -1,9 +0,0 @@
-import { categoryFilterStore } from '../../stores/categoryFilterStore';
-import { providersFilterStore } from '../../stores/providersFilterStore';
-import { subsetsFilterStore } from '../../stores/subsetsFilterStore';
-
-export function clearAllFilters() {
-    categoryFilterStore.deselectAllProperties();
-    providersFilterStore.deselectAllProperties();
-    subsetsFilterStore.deselectAllProperties();
-}

src/features/FilterFonts/model/state/manager.svelte.ts

@@ -0,0 +1,27 @@
+import { createFilterManager } from '../../lib/filterManager/filterManager.svelte';
+import {
+    FONT_CATEGORIES,
+    FONT_PROVIDERS,
+    FONT_SUBSETS,
+} from '../const/const';
+import type { FilterGroupConfig } from '../const/types/common';
+
+const filtersData: FilterGroupConfig[] = [
+    {
+        id: 'providers',
+        label: 'Font provider',
+        properties: FONT_PROVIDERS,
+    },
+    {
+        id: 'subsets',
+        label: 'Font subset',
+        properties: FONT_SUBSETS,
+    },
+    {
+        id: 'categories',
+        label: 'Font category',
+        properties: FONT_CATEGORIES,
+    },
+];
+
+export const filterManager = createFilterManager(filtersData);

src/features/FilterFonts/model/stores/categoryFilterStore.ts

@@ -1,18 +0,0 @@
-import {
-    type FilterModel,
-    createFilterStore,
-} from '$shared/lib/store/createFilterStore/createFilterStore';
-import { FONT_CATEGORIES } from '../const/const';
-
-/**
- * Initial state for CategoryFilter
- */
-export const initialState: FilterModel = {
-    searchQuery: '',
-    properties: FONT_CATEGORIES,
-};
-
-/**
- * CategoryFilter store
- */
-export const categoryFilterStore = createFilterStore(initialState);

src/features/FilterFonts/model/stores/providersFilterStore.ts

@@ -1,18 +0,0 @@
-import {
-    type FilterModel,
-    createFilterStore,
-} from '$shared/lib/store/createFilterStore/createFilterStore';
-import { FONT_PROVIDERS } from '../const/const';
-
-/**
- * Initial state for ProvidersFilter
- */
-export const initialState: FilterModel = {
-    searchQuery: '',
-    properties: FONT_PROVIDERS,
-};
-
-/**
- * ProvidersFilter store
- */
-export const providersFilterStore = createFilterStore(initialState);

src/features/FilterFonts/model/stores/subsetsFilterStore.ts

@@ -1,18 +0,0 @@
-import {
-    type FilterModel,
-    createFilterStore,
-} from '$shared/lib/store/createFilterStore/createFilterStore';
-import { FONT_SUBSETS } from '../const/const';
-
-/**
- * Initial state for SubsetsFilter
- */
-const initialState: FilterModel = {
-    searchQuery: '',
-    properties: FONT_SUBSETS,
-};
-
-/**
- * SubsetsFilter store
- */
-export const subsetsFilterStore = createFilterStore(initialState);

src/features/SetupFont/index.ts

@@ -0,0 +1,3 @@
+import SetupFontMenu from './ui/SetupFontMenu.svelte';
+
+export { SetupFontMenu };

src/features/SetupFont/lib/controlManager/controlManager.svelte.ts

@@ -0,0 +1,22 @@
+import {
+    type ControlModel,
+    createTypographyControl,
+} from '$shared/lib';
+
+export function createTypographyControlManager(configs: ControlModel[]) {
+    const controls = $state(
+        configs.map(({ id, increaseLabel, decreaseLabel, controlLabel, ...config }) => ({
+            id,
+            increaseLabel,
+            decreaseLabel,
+            controlLabel,
+            instance: createTypographyControl(config),
+        })),
+    );
+
+    return {
+        get controls() {
+            return controls;
+        },
+    };
+}

src/features/SetupFont/model/state/manager.svetle.ts

@@ -0,0 +1,56 @@
+import {
+    createTypographyControlManager,
+} from '$features/SetupFont/lib/controlManager/controlManager.svelte';
+import type { ControlModel } from '$shared/lib';
+import {
+    DEFAULT_FONT_SIZE,
+    DEFAULT_FONT_WEIGHT,
+    DEFAULT_LINE_HEIGHT,
+    FONT_SIZE_STEP,
+    FONT_WEIGHT_STEP,
+    LINE_HEIGHT_STEP,
+    MAX_FONT_SIZE,
+    MAX_FONT_WEIGHT,
+    MAX_LINE_HEIGHT,
+    MIN_FONT_SIZE,
+    MIN_FONT_WEIGHT,
+    MIN_LINE_HEIGHT,
+} from '../const/const';
+
+const controlData: ControlModel[] = [
+    {
+        id: 'font_size',
+        value: DEFAULT_FONT_SIZE,
+        max: MAX_FONT_SIZE,
+        min: MIN_FONT_SIZE,
+        step: FONT_SIZE_STEP,
+
+        increaseLabel: 'Increase Font Size',
+        decreaseLabel: 'Decrease Font Size',
+        controlLabel: 'Font Size',
+    },
+    {
+        id: 'font_weight',
+        value: DEFAULT_FONT_WEIGHT,
+        max: MAX_FONT_WEIGHT,
+        min: MIN_FONT_WEIGHT,
+        step: FONT_WEIGHT_STEP,
+
+        increaseLabel: 'Increase Font Weight',
+        decreaseLabel: 'Decrease Font Weight',
+        controlLabel: 'Font Weight',
+    },
+    {
+        id: 'line_height',
+        value: DEFAULT_LINE_HEIGHT,
+        max: MAX_LINE_HEIGHT,
+        min: MIN_LINE_HEIGHT,
+        step: LINE_HEIGHT_STEP,
+
+        increaseLabel: 'Increase Line Height',
+        decreaseLabel: 'Decrease Line Height',
+        controlLabel: 'Line Height',
+    },
+];
+
+export const controlManager = createTypographyControlManager(controlData);

src/features/SetupFont/model/stores/fontSizeStore.ts

@@ -1,17 +0,0 @@
-import {
-    type ControlModel,
-    createControlStore,
-} from '$shared/lib/store/createControlStore/createControlStore';
-import {
-    DEFAULT_FONT_SIZE,
-    MAX_FONT_SIZE,
-    MIN_FONT_SIZE,
-} from '../const/const';
-
-const initialValue: ControlModel = {
-    value: DEFAULT_FONT_SIZE,
-    max: MAX_FONT_SIZE,
-    min: MIN_FONT_SIZE,
-};
-
-export const fontSizeStore = createControlStore(initialValue);

src/features/SetupFont/model/stores/fontWeightStore.ts

@@ -1,19 +0,0 @@
-import {
-    type ControlModel,
-    createControlStore,
-} from '$shared/lib/store/createControlStore/createControlStore';
-import {
-    DEFAULT_FONT_WEIGHT,
-    FONT_WEIGHT_STEP,
-    MAX_FONT_WEIGHT,
-    MIN_FONT_WEIGHT,
-} from '../const/const';
-
-const initialValue: ControlModel = {
-    value: DEFAULT_FONT_WEIGHT,
-    max: MAX_FONT_WEIGHT,
-    min: MIN_FONT_WEIGHT,
-    step: FONT_WEIGHT_STEP,
-};
-
-export const fontWeightStore = createControlStore(initialValue);

src/features/SetupFont/model/stores/lineHeightStore.ts

@@ -1,19 +0,0 @@
-import {
-    type ControlModel,
-    createControlStore,
-} from '$shared/lib/store/createControlStore/createControlStore';
-import {
-    DEFAULT_LINE_HEIGHT,
-    LINE_HEIGHT_STEP,
-    MAX_LINE_HEIGHT,
-    MIN_LINE_HEIGHT,
-} from '../const/const';
-
-const initialValue: ControlModel = {
-    value: DEFAULT_LINE_HEIGHT,
-    max: MAX_LINE_HEIGHT,
-    min: MIN_LINE_HEIGHT,
-    step: LINE_HEIGHT_STEP,
-};
-
-export const lineHeightStore = createControlStore(initialValue);

src/features/SetupFont/ui/SetupFontMenu.svelte

@@ -1,55 +1,14 @@
 <script lang="ts">
-import * as Item from '$shared/shadcn/ui/item';
 import { Separator } from '$shared/shadcn/ui/separator/index';
 import * as Sidebar from '$shared/shadcn/ui/sidebar/index';
-import ComboControl from '$shared/ui/ComboControl/ComboControl.svelte';
+import { ComboControl } from '$shared/ui';
-import { fontSizeStore } from '../model/stores/fontSizeStore';
+import { controlManager } from '../model/state/manager.svetle';
-import { fontWeightStore } from '../model/stores/fontWeightStore';
-import { lineHeightStore } from '../model/stores/lineHeightStore';
-
-const fontSize = $derived($fontSizeStore);
-const fontWeight = $derived($fontWeightStore);
-const lineHeight = $derived($lineHeightStore);
 </script>
 
-<div class="w-full p-2 flex flex-row items-center">
+<div class="w-full p-2 flex flex-row items-center gap-2">
     <Sidebar.Trigger />
     <Separator orientation="vertical" class="h-full" />
-    <ComboControl
+    {#each controlManager.controls as control (control.id)}
-        value={fontSize.value}
+        <ComboControl control={control.instance} />
-        minValue={fontSize.min}
+    {/each}
-        maxValue={fontSize.max}
-        onChange={fontSizeStore.setValue}
-        onIncrease={fontSizeStore.increase}
-        onDecrease={fontSizeStore.decrease}
-        increaseDisabled={fontSizeStore.isAtMax()}
-        decreaseDisabled={fontSizeStore.isAtMin()}
-        increaseLabel="Increase Font Size"
-        decreaseLabel="Decrease Font Size"
-    />
-    <ComboControl
-        value={fontWeight.value}
-        minValue={fontWeight.min}
-        maxValue={fontWeight.max}
-        onChange={fontWeightStore.setValue}
-        onIncrease={fontWeightStore.increase}
-        onDecrease={fontWeightStore.decrease}
-        increaseDisabled={fontWeightStore.isAtMax()}
-        decreaseDisabled={fontWeightStore.isAtMin()}
-        increaseLabel="Increase Font Weight"
-        decreaseLabel="Decrease Font Weight"
-    />
-    <ComboControl
-        value={lineHeight.value}
-        minValue={lineHeight.min}
-        maxValue={lineHeight.max}
-        step={lineHeight.step}
-        onChange={lineHeightStore.setValue}
-        onIncrease={lineHeightStore.increase}
-        onDecrease={lineHeightStore.decrease}
-        increaseDisabled={lineHeightStore.isAtMax()}
-        decreaseDisabled={lineHeightStore.isAtMin()}
-        increaseLabel="Increase Line Height"
-        decreaseLabel="Decrease Line Height"
-    />
 </div>

src/shared/lib/helpers/createFilter/createFilter.svelte.ts

@@ -0,0 +1,111 @@
+export interface Property {
+    /**
+     * Property identifier
+     */
+    id: string;
+    /**
+     * Property name
+     */
+    name: string;
+    /**
+     * Property selected state
+     */
+    selected?: boolean;
+}
+
+export interface FilterModel {
+    /**
+     * Search query
+     */
+    searchQuery?: string;
+    /**
+     * Properties
+     */
+    properties: Property[];
+}
+
+/**
+ * Create a filter store.
+ * @param initialState - Initial state of the filter store
+ */
+export function createFilter<T extends FilterModel>(
+    initialState: T,
+) {
+    let properties = $state(
+        initialState.properties.map(p => ({
+            ...p,
+            selected: p.selected ?? false,
+        })),
+    );
+
+    const selectedProperties = $derived(properties.filter(p => p.selected));
+    const selectedCount = $derived(selectedProperties.length);
+
+    return {
+        /**
+         * Get all properties.
+         */
+        get properties() {
+            return properties;
+        },
+        /**
+         * Get selected properties.
+         */
+        get selectedProperties() {
+            return selectedProperties;
+        },
+        /**
+         * Get selected count.
+         */
+        get selectedCount() {
+            return selectedCount;
+        },
+        /**
+         * Toggle property selection.
+         */
+        toggleProperty: (id: string) => {
+            properties = properties.map(p => ({
+                ...p,
+                selected: p.id === id ? !p.selected : p.selected,
+            }));
+        },
+        /**
+         * Select property.
+         */
+        selectProperty(id: string) {
+            properties = properties.map(p => ({
+                ...p,
+                selected: p.id === id ? true : p.selected,
+            }));
+        },
+        /**
+         * Deselect property.
+         */
+        deselectProperty(id: string) {
+            properties = properties.map(p => ({
+                ...p,
+                selected: p.id === id ? false : p.selected,
+            }));
+        },
+        /**
+         * Select all properties.
+         */
+        selectAll: () => {
+            properties = properties.map(p => ({
+                ...p,
+                selected: true,
+            }));
+        },
+        /**
+         * Deselect all properties.
+         */
+        deselectAll: () => {
+            properties = properties.map(p => ({
+                ...p,
+                selected: false,
+            }));
+        },
+    };
+}
+
+export type Filter = ReturnType<typeof createFilter>;

src/shared/lib/helpers/createTypographyControl/createTypographyControl.svelte.ts

@@ -0,0 +1,73 @@
+import {
+    clampNumber,
+    roundToStepPrecision,
+} from '$shared/lib/utils';
+
+export interface ControlDataModel {
+    value: number;
+    min: number;
+    max: number;
+    step: number;
+}
+
+export interface ControlModel extends ControlDataModel {
+    id: string;
+    increaseLabel: string;
+    decreaseLabel: string;
+    controlLabel: string;
+}
+
+export function createTypographyControl<T extends ControlDataModel>(
+    initialState: T,
+) {
+    let value = $state(initialState.value);
+    let max = $state(initialState.max);
+    let min = $state(initialState.min);
+    let step = $state(initialState.step);
+
+    const { isAtMax, isAtMin } = $derived({
+        isAtMax: value >= max,
+        isAtMin: value <= min,
+    });
+
+    return {
+        get value() {
+            return value;
+        },
+        set value(newValue) {
+            value = roundToStepPrecision(
+                clampNumber(newValue, min, max),
+                step,
+            );
+        },
+        get max() {
+            return max;
+        },
+        get min() {
+            return min;
+        },
+        get step() {
+            return step;
+        },
+        get isAtMax() {
+            return isAtMax;
+        },
+        get isAtMin() {
+            return isAtMin;
+        },
+        increase() {
+            value = roundToStepPrecision(
+                clampNumber(value + step, min, max),
+                step,
+            );
+        },
+        decrease() {
+            value = roundToStepPrecision(
+                clampNumber(value - step, min, max),
+                step,
+            );
+        },
+    };
+}
+
+export type TypographyControl = ReturnType<typeof createTypographyControl>;

src/shared/lib/helpers/createVirtualizer/createVirtualizer.svelte.ts

@@ -112,3 +112,5 @@ export function createVirtualizer(
         measureElement: (el: HTMLElement) => state.measureElement(el),
     };
 }
+
+export type Virtualizer = ReturnType<typeof createVirtualizer>;

src/shared/lib/helpers/index.ts

@@ -0,0 +1,20 @@
+export {
+    createFilter,
+    type Filter,
+    type FilterModel,
+    type Property,
+} from './createFilter/createFilter.svelte';
+
+export {
+    type ControlDataModel,
+    type ControlModel,
+    createTypographyControl,
+    type TypographyControl,
+} from './createTypographyControl/createTypographyControl.svelte';
+
+export {
+    createVirtualizer,
+    type VirtualItem,
+    type Virtualizer,
+    type VirtualizerOptions,
+} from './createVirtualizer/createVirtualizer.svelte';

src/shared/lib/index.ts

@@ -0,0 +1,14 @@
+export {
+    type ControlDataModel,
+    type ControlModel,
+    createFilter,
+    createTypographyControl,
+    createVirtualizer,
+    type Filter,
+    type FilterModel,
+    type Property,
+    type TypographyControl,
+    type VirtualItem,
+    type Virtualizer,
+    type VirtualizerOptions,
+} from './helpers';

src/shared/lib/store/createControlStore/createControlStore.test.ts

@@ -1,89 +0,0 @@
-import { get } from 'svelte/store';
-import {
-    beforeEach,
-    describe,
-    expect,
-    it,
-} from 'vitest';
-import {
-    type ControlModel,
-    createControlStore,
-} from './createControlStore';
-
-describe('createControlStore', () => {
-    let store: ReturnType<typeof createControlStore<number>>;
-
-    beforeEach(() => {
-        const initialState: ControlModel<number> = {
-            value: 10,
-            min: 0,
-            max: 100,
-            step: 5,
-        };
-        store = createControlStore(initialState);
-    });
-
-    it('initializes with correct state', () => {
-        expect(get(store)).toEqual({
-            value: 10,
-            min: 0,
-            max: 100,
-            step: 5,
-        });
-    });
-
-    it('increases value by step', () => {
-        store.increase();
-        expect(get(store).value).toBe(15);
-    });
-
-    it('decreases value by step', () => {
-        store.decrease();
-        expect(get(store).value).toBe(5);
-    });
-
-    it('clamps value at maximum', () => {
-        store.setValue(200);
-        expect(get(store).value).toBe(100);
-    });
-
-    it('clamps value at minimum', () => {
-        store.setValue(-10);
-        expect(get(store).value).toBe(0);
-    });
-
-    it('rounds to step precision', () => {
-        store.setValue(12.34);
-        // With step=5, 12.34 is clamped and rounded to nearest integer (0 decimal places)
-        expect(get(store).value).toBe(12);
-    });
-
-    it('handles decimal steps correctly', () => {
-        const decimalStore = createControlStore({
-            value: 1.0,
-            min: 0,
-            max: 2,
-            step: 0.05,
-        });
-        decimalStore.increase();
-        expect(get(decimalStore).value).toBe(1.05);
-    });
-
-    it('isAtMax returns true when at maximum', () => {
-        store.setValue(100);
-        expect(store.isAtMax()).toBe(true);
-    });
-
-    it('isAtMax returns false when not at maximum', () => {
-        expect(store.isAtMax()).toBe(false);
-    });
-
-    it('isAtMin returns true when at minimum', () => {
-        store.setValue(0);
-        expect(store.isAtMin()).toBe(true);
-    });
-
-    it('isAtMin returns false when not at minimum', () => {
-        expect(store.isAtMin()).toBe(false);
-    });
-});

src/shared/lib/store/createControlStore/createControlStore.ts

@@ -1,117 +0,0 @@
-import {
-    type Writable,
-    get,
-    writable,
-} from 'svelte/store';
-
-/**
- * Model for a control value with min/max bounds
- */
-export type ControlModel<
-    TValue extends number = number,
-> = {
-    value: TValue;
-    min: TValue;
-    max: TValue;
-    step?: TValue;
-};
-
-/**
- * Store model with methods for control manipulation
- */
-export type ControlStoreModel<
-    TValue extends number,
-> =
-    & Writable<ControlModel<TValue>>
-    & {
-        increase: () => void;
-        decrease: () => void;
-        /** Set a specific value */
-        setValue: (newValue: TValue) => void;
-        isAtMax: () => boolean;
-        isAtMin: () => boolean;
-    };
-
-/**
- * Create a writable store for numeric control values with bounds
- *
- * @template TValue - The value type (extends number)
- * @param initialState - Initial state containing value, min, and max
- */
-/**
- * Get the number of decimal places in a number
- *
- * For example:
- * - 1 -> 0
- * - 0.1 -> 1
- * - 0.01 -> 2
- * - 0.05 -> 2
- *
- * @param step - The step number to analyze
- * @returns The number of decimal places
- */
-function getDecimalPlaces(step: number): number {
-    const str = step.toString();
-    const decimalPart = str.split('.')[1];
-    return decimalPart ? decimalPart.length : 0;
-}
-
-/**
- * Round a value to the precision of the given step
- *
- * This fixes floating-point precision errors that occur with decimal steps.
- * For example, with step=0.05, adding it repeatedly can produce values like
- * 1.3499999999999999 instead of 1.35.
- *
- * We use toFixed() to round to the appropriate decimal places instead of
- * Math.round(value / step) * step, which doesn't always work correctly
- * due to floating-point arithmetic errors.
- *
- * @param value - The value to round
- * @param step - The step to round to (defaults to 1)
- * @returns The rounded value
- */
-function roundToStepPrecision(value: number, step: number = 1): number {
-    if (step <= 0) {
-        return value;
-    }
-    const decimals = getDecimalPlaces(step);
-    return parseFloat(value.toFixed(decimals));
-}
-
-export function createControlStore<
-    TValue extends number = number,
->(
-    initialState: ControlModel<TValue>,
-): ControlStoreModel<TValue> {
-    const store = writable(initialState);
-    const { subscribe, set, update } = store;
-
-    const clamp = (value: number): TValue => {
-        return Math.max(initialState.min, Math.min(value, initialState.max)) as TValue;
-    };
-
-    return {
-        subscribe,
-        set,
-        update,
-        increase: () =>
-            update(m => {
-                const step = m.step ?? 1;
-                const newValue = clamp(m.value + step);
-                return { ...m, value: roundToStepPrecision(newValue, step) as TValue };
-            }),
-        decrease: () =>
-            update(m => {
-                const step = m.step ?? 1;
-                const newValue = clamp(m.value - step);
-                return { ...m, value: roundToStepPrecision(newValue, step) as TValue };
-            }),
-        setValue: (v: TValue) => {
-            const step = initialState.step ?? 1;
-            update(m => ({ ...m, value: roundToStepPrecision(clamp(v), step) as TValue }));
-        },
-        isAtMin: () => get(store).value === initialState.min,
-        isAtMax: () => get(store).value === initialState.max,
-    };
-}

src/shared/lib/store/createFilterStore/createFilterStore.test.ts

@@ -1,136 +0,0 @@
-import { get } from 'svelte/store';
-import {
-    beforeEach,
-    describe,
-    expect,
-    it,
-} from 'vitest';
-import {
-    type FilterModel,
-    type Property,
-    createFilterStore,
-} from './createFilterStore';
-
-describe('createFilterStore', () => {
-    const mockProperties: Property[] = [
-        { id: '1', name: 'Sans-serif', selected: false },
-        { id: '2', name: 'Serif', selected: false },
-        { id: '3', name: 'Display', selected: false },
-    ];
-
-    let store: ReturnType<typeof createFilterStore>;
-
-    beforeEach(() => {
-        const initialState: FilterModel = {
-            searchQuery: '',
-            properties: mockProperties,
-        };
-        store = createFilterStore(initialState);
-    });
-
-    it('initializes with correct state', () => {
-        const state = get(store);
-        expect(state).toEqual({
-            searchQuery: '',
-            properties: mockProperties,
-        });
-    });
-
-    it('sets search query', () => {
-        store.setSearchQuery('serif');
-        const state = get(store);
-        expect(state.searchQuery).toBe('serif');
-    });
-
-    it('clears search query', () => {
-        store.setSearchQuery('test');
-        store.clearSearchQuery();
-        const state = get(store);
-        expect(state.searchQuery).toBeUndefined();
-    });
-
-    it('selects a property', () => {
-        store.selectProperty('1');
-        const state = get(store);
-        const property = state.properties.find(p => p.id === '1');
-        expect(property?.selected).toBe(true);
-    });
-
-    it('deselects a property', () => {
-        store.selectProperty('1');
-        store.deselectProperty('1');
-        const state = get(store);
-        const property = state.properties.find(p => p.id === '1');
-        expect(property?.selected).toBe(false);
-    });
-
-    it('toggles property from unselected to selected', () => {
-        store.toggleProperty('1');
-        const state = get(store);
-        const property = state.properties.find(p => p.id === '1');
-        expect(property?.selected).toBe(true);
-    });
-
-    it('toggles property from selected to unselected', () => {
-        store.selectProperty('1');
-        store.toggleProperty('1');
-        const state = get(store);
-        const property = state.properties.find(p => p.id === '1');
-        expect(property?.selected).toBe(false);
-    });
-
-    it('selects all properties', () => {
-        store.selectAllProperties();
-        const state = get(store);
-        expect(state.properties.every(p => p.selected)).toBe(true);
-    });
-
-    it('deselects all properties', () => {
-        store.selectAllProperties();
-        store.deselectAllProperties();
-        const state = get(store);
-        expect(state.properties.every(p => !p.selected)).toBe(true);
-    });
-
-    it('gets all properties', () => {
-        const allProps = store.getAllProperties();
-        const props = get(allProps);
-        expect(props).toEqual(mockProperties);
-    });
-
-    it('gets selected properties', () => {
-        store.selectProperty('1');
-        store.selectProperty('3');
-        const selectedProps = store.getSelectedProperties();
-        const props = get(selectedProps);
-        expect(props).toHaveLength(2);
-        expect(props?.[0].id).toBe('1');
-        expect(props?.[1].id).toBe('3');
-    });
-
-    it('filters properties by search query', () => {
-        store.setSearchQuery('serif');
-        const filteredProps = store.getFilteredProperties();
-        const props = get(filteredProps);
-        // 'serif' is a substring of 'Sans-serif' (case-sensitive match)
-        expect(props).toHaveLength(1);
-        expect(props?.[0].id).toBe('1');
-    });
-
-    it('filter is case-sensitive', () => {
-        store.setSearchQuery('San');
-        const filteredProps = store.getFilteredProperties();
-        const props = get(filteredProps);
-        // 'San' matches 'Sans-serif' exactly (case-sensitive)
-        expect(props).toHaveLength(1);
-        expect(props?.[0].id).toBe('1');
-    });
-
-    it('filter returns all properties when query is empty', () => {
-        store.setSearchQuery('');
-        const filteredProps = store.getFilteredProperties();
-        let props: Property[] | undefined = undefined;
-        filteredProps.subscribe(p => (props = p))();
-        expect(props).toHaveLength(3);
-    });
-});

src/shared/lib/store/createFilterStore/createFilterStore.ts

@@ -1,226 +0,0 @@
-import {
-    type Readable,
-    type Writable,
-    derived,
-    writable,
-} from 'svelte/store';
-
-export interface Property {
-    /**
-     * Property identifier
-     */
-    id: string;
-    /**
-     * Property name
-     */
-    name: string;
-    /**
-     * Property selected state
-     */
-    selected?: boolean;
-}
-
-export interface FilterModel {
-    /**
-     * Search query
-     */
-    searchQuery?: string;
-    /**
-     * Properties
-     */
-    properties: Property[];
-}
-
-/**
- * Model for reusable filter store with search support and property selection
- */
-export interface FilterStore<T extends FilterModel> extends Writable<T> {
-    /**
-     * Get the store.
-     * @returns Readable store with filter data
-     */
-    getStore: () => Readable<T>;
-    /**
-     * Get all properties.
-     * @returns Readable store with properties
-     */
-    getAllProperties: () => Readable<Property[]>;
-    /**
-     * Get the selected properties.
-     * @returns Readable store with selected properties
-     */
-    getSelectedProperties: () => Readable<Property[]>;
-    /**
-     * Get the filtered properties.
-     * @returns Readable store with filtered properties
-     */
-    getFilteredProperties: () => Readable<Property[]>;
-    /**
-     * Update the search query filter.
-     *
-     * @param searchQuery - Search text (undefined to clear)
-     */
-    setSearchQuery: (searchQuery: string | undefined) => void;
-    /**
-     * Clear the search query filter.
-     */
-    clearSearchQuery: () => void;
-    /**
-     * Select a property.
-     *
-     * @param property - Property to select
-     */
-    selectProperty: (propertyId: string) => void;
-    /**
-     * Deselect a property.
-     *
-     * @param property - Property to deselect
-     */
-    deselectProperty: (propertyId: string) => void;
-    /**
-     * Toggle a property.
-     *
-     * @param propertyId - Property ID
-     */
-    toggleProperty: (propertyId: string) => void;
-    /**
-     * Select all properties.
-     */
-    selectAllProperties: () => void;
-    /**
-     * Deselect all properties.
-     */
-    deselectAllProperties: () => void;
-}
-
-/**
- * Create a filter store.
- * @param initialState - Initial state of the filter store
- * @returns FilterStore<T>
- */
-export function createFilterStore<T extends FilterModel>(
-    initialState?: T,
-): FilterStore<T> {
-    const { subscribe, set, update } = writable<T>(initialState);
-
-    return {
-        /*
-         * Expose subscribe, set, and update from Writable.
-         * This makes FilterStore compatible with Writable interface.
-         */
-        subscribe,
-        set,
-        update,
-        /**
-         * Get the current state of the filter store.
-         */
-        getStore: () => {
-            return {
-                subscribe,
-            };
-        },
-        /**
-         * Get the filtered properties.
-         */
-        getAllProperties: () => {
-            return derived({ subscribe }, $store => {
-                return $store.properties;
-            });
-        },
-        /**
-         * Get the selected properties.
-         */
-        getSelectedProperties: () => {
-            return derived({ subscribe }, $store => {
-                return $store.properties.filter(property => property.selected);
-            });
-        },
-        /**
-         * Get the filtered properties.
-         */
-        getFilteredProperties: () => {
-            return derived({ subscribe }, $store => {
-                return $store.properties.filter(property =>
-                    property.name.includes($store.searchQuery || '')
-                );
-            });
-        },
-        /**
-         * Update the search query filter.
-         *
-         * @param searchQuery - Search text (undefined to clear)
-         */
-        setSearchQuery: (searchQuery: string | undefined) => {
-            update(state => ({
-                ...state,
-                searchQuery: searchQuery || undefined,
-            }));
-        },
-        /**
-         * Clear the search query filter.
-         */
-        clearSearchQuery: () => {
-            update(state => ({
-                ...state,
-                searchQuery: undefined,
-            }));
-        },
-        /**
-         * Select a property.
-         *
-         * @param propertyId - Property ID
-         */
-        selectProperty: (propertyId: string) => {
-            update(state => ({
-                ...state,
-                properties: state.properties.map(c =>
-                    c.id === propertyId ? { ...c, selected: true } : c
-                ),
-            }));
-        },
-        /**
-         * Deselect a property.
-         *
-         * @param propertyId - Property ID
-         */
-        deselectProperty: (propertyId: string) => {
-            update(state => ({
-                ...state,
-                properties: state.properties.map(c =>
-                    c.id === propertyId ? { ...c, selected: false } : c
-                ),
-            }));
-        },
-        /**
-         * Toggle a property.
-         *
-         * @param propertyId - Property ID
-         */
-        toggleProperty: (propertyId: string) => {
-            update(state => ({
-                ...state,
-                properties: state.properties.map(c =>
-                    c.id === propertyId ? { ...c, selected: !c.selected } : c
-                ),
-            }));
-        },
-        /**
-         * Select all properties
-         */
-        selectAllProperties: () => {
-            update(state => ({
-                ...state,
-                properties: state.properties.map(c => ({ ...c, selected: true })),
-            }));
-        },
-        /**
-         * Deselect all properties
-         */
-        deselectAllProperties: () => {
-            update(state => ({
-                ...state,
-                properties: state.properties.map(c => ({ ...c, selected: false })),
-            }));
-        },
-    };
-}

src/shared/lib/store/index.ts

@@ -1,18 +0,0 @@
-/**
- * Shared store exports
- *
- * Exports all store creators and types for Svelte 5 reactive state management
- */
-
-export { createFilterStore } from './createFilterStore/createFilterStore';
-export type {
-    FilterModel,
-    FilterStore,
-    Property,
-} from './createFilterStore/createFilterStore';
-
-export { createControlStore } from './createControlStore/createControlStore';
-export type {
-    ControlModel,
-    ControlStoreModel,
-} from './createControlStore/createControlStore';

src/shared/lib/utils/clampNumber/clampNumber.test.ts

@@ -0,0 +1,176 @@
+/**
+ * Tests for clampNumber utility
+ */
+
+import {
+    describe,
+    expect,
+    test,
+} from 'vitest';
+import { clampNumber } from './clampNumber';
+
+describe('clampNumber', () => {
+    describe('basic functionality', () => {
+        test('should return value when within range', () => {
+            expect(clampNumber(5, 0, 10)).toBe(5);
+            expect(clampNumber(0.5, 0, 1)).toBe(0.5);
+            expect(clampNumber(-3, -10, 10)).toBe(-3);
+        });
+
+        test('should clamp value to minimum', () => {
+            expect(clampNumber(-5, 0, 10)).toBe(0);
+            expect(clampNumber(-100, -50, 100)).toBe(-50);
+            expect(clampNumber(0, 1, 10)).toBe(1);
+        });
+
+        test('should clamp value to maximum', () => {
+            expect(clampNumber(15, 0, 10)).toBe(10);
+            expect(clampNumber(150, -50, 100)).toBe(100);
+            expect(clampNumber(100, 1, 50)).toBe(50);
+        });
+
+        test('should handle boundary values', () => {
+            expect(clampNumber(0, 0, 10)).toBe(0);
+            expect(clampNumber(10, 0, 10)).toBe(10);
+            expect(clampNumber(-5, -5, 5)).toBe(-5);
+            expect(clampNumber(5, -5, 5)).toBe(5);
+        });
+    });
+
+    describe('negative ranges', () => {
+        test('should handle fully negative ranges', () => {
+            expect(clampNumber(-5, -10, -1)).toBe(-5);
+            expect(clampNumber(-15, -10, -1)).toBe(-10);
+            expect(clampNumber(-0.5, -10, -1)).toBe(-1);
+        });
+
+        test('should handle ranges spanning zero', () => {
+            expect(clampNumber(0, -10, 10)).toBe(0);
+            expect(clampNumber(-5, -10, 10)).toBe(-5);
+            expect(clampNumber(5, -10, 10)).toBe(5);
+        });
+    });
+
+    describe('floating-point numbers', () => {
+        test('should clamp floating-point values correctly', () => {
+            expect(clampNumber(0.75, 0, 1)).toBe(0.75);
+            expect(clampNumber(1.5, 0, 1)).toBe(1);
+            expect(clampNumber(-0.25, 0, 1)).toBe(0);
+        });
+
+        test('should handle very small decimals', () => {
+            expect(clampNumber(0.001, 0, 0.01)).toBe(0.001);
+            expect(clampNumber(0.1, 0, 0.01)).toBe(0.01);
+        });
+
+        test('should handle large floating-point numbers', () => {
+            expect(clampNumber(123.456, 100, 200)).toBe(123.456);
+            expect(clampNumber(99.999, 100, 200)).toBe(100);
+            expect(clampNumber(200.001, 100, 200)).toBe(200);
+        });
+    });
+
+    describe('edge cases', () => {
+        test('should handle when min equals max', () => {
+            expect(clampNumber(5, 10, 10)).toBe(10);
+            expect(clampNumber(10, 10, 10)).toBe(10);
+            expect(clampNumber(15, 10, 10)).toBe(10);
+            expect(clampNumber(0, 0, 0)).toBe(0);
+        });
+
+        test('should handle zero values', () => {
+            expect(clampNumber(0, 0, 10)).toBe(0);
+            expect(clampNumber(0, -10, 10)).toBe(0);
+            expect(clampNumber(5, 0, 0)).toBe(0);
+        });
+
+        test('should handle reversed min/max (min > max)', () => {
+            // When min > max, Math.max/Math.min will still produce a result
+            // but it's logically incorrect - we test the actual behavior
+            // Math.min(Math.max(5, 10), 0) = Math.min(10, 0) = 0
+            expect(clampNumber(5, 10, 0)).toBe(0);
+            expect(clampNumber(15, 10, 0)).toBe(0);
+            expect(clampNumber(-5, 10, 0)).toBe(0);
+        });
+    });
+
+    describe('special number values', () => {
+        test('should handle Infinity', () => {
+            expect(clampNumber(Infinity, 0, 10)).toBe(10);
+            expect(clampNumber(-Infinity, 0, 10)).toBe(0);
+            expect(clampNumber(5, -Infinity, Infinity)).toBe(5);
+        });
+
+        test('should handle NaN', () => {
+            expect(clampNumber(NaN, 0, 10)).toBeNaN();
+        });
+    });
+
+    describe('real-world scenarios', () => {
+        test('should clamp font size values', () => {
+            // Typical font size range: 8px to 72px
+            expect(clampNumber(16, 8, 72)).toBe(16);
+            expect(clampNumber(4, 8, 72)).toBe(8);
+            expect(clampNumber(100, 8, 72)).toBe(72);
+        });
+
+        test('should clamp slider values', () => {
+            // Slider range: 0 to 100
+            expect(clampNumber(50, 0, 100)).toBe(50);
+            expect(clampNumber(-10, 0, 100)).toBe(0);
+            expect(clampNumber(150, 0, 100)).toBe(100);
+        });
+
+        test('should clamp opacity values', () => {
+            // Opacity range: 0 to 1
+            expect(clampNumber(0.5, 0, 1)).toBe(0.5);
+            expect(clampNumber(-0.2, 0, 1)).toBe(0);
+            expect(clampNumber(1.2, 0, 1)).toBe(1);
+        });
+
+        test('should clamp percentage values', () => {
+            // Percentage range: 0 to 100
+            expect(clampNumber(75, 0, 100)).toBe(75);
+            expect(clampNumber(-5, 0, 100)).toBe(0);
+            expect(clampNumber(105, 0, 100)).toBe(100);
+        });
+
+        test('should clamp coordinate values', () => {
+            // Canvas coordinates: 0 to 800 width, 0 to 600 height
+            expect(clampNumber(400, 0, 800)).toBe(400);
+            expect(clampNumber(-50, 0, 800)).toBe(0);
+            expect(clampNumber(900, 0, 800)).toBe(800);
+        });
+
+        test('should clamp font weight values', () => {
+            // Font weight range: 100 to 900 (in increments of 100)
+            expect(clampNumber(400, 100, 900)).toBe(400);
+            expect(clampNumber(50, 100, 900)).toBe(100);
+            expect(clampNumber(950, 100, 900)).toBe(900);
+        });
+
+        test('should clamp line height values', () => {
+            // Line height range: 0.5 to 3.0
+            expect(clampNumber(1.5, 0.5, 3.0)).toBe(1.5);
+            expect(clampNumber(0.3, 0.5, 3.0)).toBe(0.5);
+            expect(clampNumber(4.0, 0.5, 3.0)).toBe(3.0);
+        });
+    });
+
+    describe('numeric constraints', () => {
+        test('should handle very large numbers', () => {
+            expect(clampNumber(Number.MAX_VALUE, 0, 100)).toBe(100);
+            expect(clampNumber(Number.MIN_VALUE, -10, 10)).toBe(Number.MIN_VALUE);
+        });
+
+        test('should handle negative infinity boundaries', () => {
+            expect(clampNumber(5, -Infinity, 10)).toBe(5);
+            expect(clampNumber(-1000, -Infinity, 10)).toBe(-1000);
+        });
+
+        test('should handle positive infinity boundaries', () => {
+            expect(clampNumber(5, 0, Infinity)).toBe(5);
+            expect(clampNumber(1000, 0, Infinity)).toBe(1000);
+        });
+    });
+});

src/shared/lib/utils/clampNumber/clampNumber.ts

@@ -0,0 +1,10 @@
+/**
+ * Clamp a number within a range.
+ * @param value The number to clamp.
+ * @param min minimum value
+ * @param max maximum value
+ * @returns The clamped number.
+ */
+export function clampNumber(value: number, min: number, max: number): number {
+    return Math.min(Math.max(value, min), max);
+}

src/shared/lib/utils/getDecimalPlaces/getDecimalPlaces.test.ts

@@ -0,0 +1,188 @@
+/**
+ * Tests for getDecimalPlaces utility
+ */
+
+import {
+    describe,
+    expect,
+    test,
+} from 'vitest';
+import { getDecimalPlaces } from './getDecimalPlaces';
+
+describe('getDecimalPlaces', () => {
+    describe('basic functionality', () => {
+        test('should return 0 for integers', () => {
+            expect(getDecimalPlaces(0)).toBe(0);
+            expect(getDecimalPlaces(1)).toBe(0);
+            expect(getDecimalPlaces(42)).toBe(0);
+            expect(getDecimalPlaces(-7)).toBe(0);
+            expect(getDecimalPlaces(1000)).toBe(0);
+        });
+
+        test('should return correct decimal places for decimals', () => {
+            expect(getDecimalPlaces(0.1)).toBe(1);
+            expect(getDecimalPlaces(0.5)).toBe(1);
+            expect(getDecimalPlaces(0.01)).toBe(2);
+            expect(getDecimalPlaces(0.05)).toBe(2);
+            expect(getDecimalPlaces(0.001)).toBe(3);
+            expect(getDecimalPlaces(0.123)).toBe(3);
+            expect(getDecimalPlaces(0.123456)).toBe(6);
+        });
+
+        test('should handle negative decimal numbers', () => {
+            expect(getDecimalPlaces(-0.1)).toBe(1);
+            expect(getDecimalPlaces(-0.05)).toBe(2);
+            expect(getDecimalPlaces(-1.5)).toBe(1);
+            expect(getDecimalPlaces(-99.99)).toBe(2);
+        });
+    });
+
+    describe('whole numbers with decimal part', () => {
+        test('should handle numbers with integer and decimal parts', () => {
+            expect(getDecimalPlaces(1.5)).toBe(1);
+            expect(getDecimalPlaces(10.25)).toBe(2);
+            expect(getDecimalPlaces(100.125)).toBe(3);
+            expect(getDecimalPlaces(1234.5678)).toBe(4);
+        });
+
+        test('should handle trailing zeros correctly', () => {
+            // Note: JavaScript string representation drops trailing zeros
+            expect(getDecimalPlaces(1.5)).toBe(1);
+            expect(getDecimalPlaces(1.50)).toBe(1); // 1.50 becomes "1.5" in string
+        });
+    });
+
+    describe('edge cases', () => {
+        test('should handle zero', () => {
+            expect(getDecimalPlaces(0)).toBe(0);
+            expect(getDecimalPlaces(0.0)).toBe(0);
+        });
+
+        test('should handle very small decimals', () => {
+            expect(getDecimalPlaces(0.0001)).toBe(4);
+            expect(getDecimalPlaces(0.00001)).toBe(5);
+            expect(getDecimalPlaces(0.000001)).toBe(6);
+        });
+
+        test('should handle very large numbers', () => {
+            expect(getDecimalPlaces(123456789.123)).toBe(3);
+            expect(getDecimalPlaces(999999.9999)).toBe(4);
+        });
+
+        test('should handle negative whole numbers', () => {
+            expect(getDecimalPlaces(-1)).toBe(0);
+            expect(getDecimalPlaces(-100)).toBe(0);
+            expect(getDecimalPlaces(-9999)).toBe(0);
+        });
+    });
+
+    describe('special number values', () => {
+        test('should handle Infinity', () => {
+            expect(getDecimalPlaces(Infinity)).toBe(0);
+            expect(getDecimalPlaces(-Infinity)).toBe(0);
+        });
+
+        test('should handle NaN', () => {
+            expect(getDecimalPlaces(NaN)).toBe(0);
+        });
+    });
+
+    describe('scientific notation', () => {
+        test('should handle numbers in scientific notation', () => {
+            // Very small numbers may be represented in scientific notation
+            const tiny = 1e-10;
+            const result = getDecimalPlaces(tiny);
+            // The result depends on how JS represents this as a string
+            expect(typeof result).toBe('number');
+        });
+
+        test('should handle large scientific notation numbers', () => {
+            const large = 1.23e5; // 123000
+            expect(getDecimalPlaces(large)).toBe(0);
+        });
+    });
+
+    describe('real-world scenarios', () => {
+        test('should handle currency values (2 decimal places)', () => {
+            expect(getDecimalPlaces(0.01)).toBe(2); // 1 cent
+            expect(getDecimalPlaces(0.99)).toBe(2); // 99 cents
+            // Note: JavaScript string representation drops trailing zeros
+            // 10.50 becomes "10.5" in string, so returns 1 decimal place
+            expect(getDecimalPlaces(10.50)).toBe(1); // $10.50
+            expect(getDecimalPlaces(999.99)).toBe(2); // $999.99
+        });
+
+        test('should handle measurement values', () => {
+            expect(getDecimalPlaces(12.5)).toBe(1); // 12.5 mm
+            expect(getDecimalPlaces(12.34)).toBe(2); // 12.34 cm
+            expect(getDecimalPlaces(12.345)).toBe(3); // 12.345 m
+        });
+
+        test('should handle step values for sliders', () => {
+            expect(getDecimalPlaces(0.1)).toBe(1); // Fine adjustment
+            expect(getDecimalPlaces(0.25)).toBe(2); // Quarter steps
+            expect(getDecimalPlaces(0.5)).toBe(1); // Half steps
+            expect(getDecimalPlaces(1)).toBe(0); // Whole steps
+        });
+
+        test('should handle font size increments', () => {
+            expect(getDecimalPlaces(0.5)).toBe(1); // Half point increments
+            expect(getDecimalPlaces(1)).toBe(0); // Whole point increments
+        });
+
+        test('should handle opacity values', () => {
+            expect(getDecimalPlaces(0.1)).toBe(1); // 10% increments
+            expect(getDecimalPlaces(0.05)).toBe(2); // 5% increments
+            expect(getDecimalPlaces(0.01)).toBe(2); // 1% increments
+        });
+
+        test('should handle percentage values', () => {
+            expect(getDecimalPlaces(0.5)).toBe(1); // 0.5%
+            expect(getDecimalPlaces(12.5)).toBe(1); // 12.5%
+            expect(getDecimalPlaces(33.33)).toBe(2); // 33.33%
+        });
+
+        test('should handle coordinate precision', () => {
+            expect(getDecimalPlaces(12.3456789)).toBe(7); // High precision GPS
+            expect(getDecimalPlaces(100.5)).toBe(1); // Low precision coordinates
+        });
+
+        test('should handle time values', () => {
+            expect(getDecimalPlaces(0.1)).toBe(1); // 100ms
+            expect(getDecimalPlaces(0.01)).toBe(2); // 10ms
+            expect(getDecimalPlaces(0.001)).toBe(3); // 1ms
+        });
+    });
+
+    describe('common step values', () => {
+        test('should correctly identify precision of common step values', () => {
+            expect(getDecimalPlaces(0.05)).toBe(2); // Very fine steps
+            expect(getDecimalPlaces(0.1)).toBe(1); // Fine steps
+            expect(getDecimalPlaces(0.25)).toBe(2); // Quarter steps
+            expect(getDecimalPlaces(0.5)).toBe(1); // Half steps
+            expect(getDecimalPlaces(1)).toBe(0); // Whole steps
+            expect(getDecimalPlaces(2)).toBe(0); // Even steps
+            expect(getDecimalPlaces(5)).toBe(0); // Five steps
+            expect(getDecimalPlaces(10)).toBe(0); // Ten steps
+            expect(getDecimalPlaces(25)).toBe(0); // Twenty-five steps
+            expect(getDecimalPlaces(50)).toBe(0); // Fifty steps
+            expect(getDecimalPlaces(100)).toBe(0); // Hundred steps
+        });
+    });
+
+    describe('floating-point representation', () => {
+        test('should handle standard floating-point representation', () => {
+            expect(getDecimalPlaces(1.1)).toBe(1);
+            expect(getDecimalPlaces(1.2)).toBe(1);
+            expect(getDecimalPlaces(1.3)).toBe(1);
+        });
+
+        test('should handle numbers that might have floating-point issues', () => {
+            // 0.1 + 0.2 = 0.30000000000000004 in JS
+            const sum = 0.1 + 0.2;
+            const places = getDecimalPlaces(sum);
+            // The function analyzes the string representation
+            expect(typeof places).toBe('number');
+        });
+    });
+});

src/shared/lib/utils/getDecimalPlaces/getDecimalPlaces.ts

@@ -0,0 +1,17 @@
+/**
+ * Get the number of decimal places in a number
+ *
+ * For example:
+ * - 1 -> 0
+ * - 0.1 -> 1
+ * - 0.01 -> 2
+ * - 0.05 -> 2
+ *
+ * @param step - The step number to analyze
+ * @returns The number of decimal places
+ */
+export function getDecimalPlaces(step: number): number {
+    const str = step.toString();
+    const decimalPart = str.split('.')[1];
+    return decimalPart ? decimalPart.length : 0;
+}

src/shared/lib/utils/index.ts

@@ -2,9 +2,11 @@
  * Shared utility functions
  */
 
-export { buildQueryString } from './buildQueryString';
+export {
-export type {
+    buildQueryString,
-    QueryParams,
+    type QueryParams,
-    QueryParamValue,
+    type QueryParamValue,
-} from './buildQueryString';
+} from './buildQueryString/buildQueryString';
-export { createVirtualizer } from './createVirtualizer/createVirtualizer';
+export { clampNumber } from './clampNumber/clampNumber';
+export { getDecimalPlaces } from './getDecimalPlaces/getDecimalPlaces';
+export { roundToStepPrecision } from './roundToStepPrecision/roundToStepPrecision';

src/shared/lib/utils/roundToStepPrecision/roundToStepPrecision.test.ts

@@ -0,0 +1,270 @@
+/**
+ * Tests for roundToStepPrecision utility
+ */
+
+import {
+    describe,
+    expect,
+    test,
+} from 'vitest';
+import { roundToStepPrecision } from './roundToStepPrecision';
+
+describe('roundToStepPrecision', () => {
+    describe('basic functionality', () => {
+        test('should return value unchanged for step=1', () => {
+            // step=1 has 0 decimal places, so it rounds to integers
+            expect(roundToStepPrecision(5, 1)).toBe(5);
+            expect(roundToStepPrecision(5.5, 1)).toBe(6); // rounds to nearest integer
+            expect(roundToStepPrecision(5.999, 1)).toBe(6);
+        });
+
+        test('should round to 1 decimal place for step=0.1', () => {
+            expect(roundToStepPrecision(1.23, 0.1)).toBeCloseTo(1.2);
+            expect(roundToStepPrecision(1.25, 0.1)).toBeCloseTo(1.3);
+            expect(roundToStepPrecision(1.29, 0.1)).toBeCloseTo(1.3);
+        });
+
+        test('should round to 2 decimal places for step=0.01', () => {
+            expect(roundToStepPrecision(1.234, 0.01)).toBeCloseTo(1.23);
+            expect(roundToStepPrecision(1.235, 0.01)).toBeCloseTo(1.24);
+            expect(roundToStepPrecision(1.239, 0.01)).toBeCloseTo(1.24);
+        });
+
+        test('should round to 3 decimal places for step=0.001', () => {
+            expect(roundToStepPrecision(1.2345, 0.001)).toBeCloseTo(1.235);
+            expect(roundToStepPrecision(1.2344, 0.001)).toBeCloseTo(1.234);
+        });
+    });
+
+    describe('floating-point precision issues', () => {
+        test('should fix floating-point precision errors with step=0.05', () => {
+            // Known floating-point issue: 0.1 + 0.05 = 0.15000000000000002
+            const value = 0.1 + 0.05;
+            const result = roundToStepPrecision(value, 0.05);
+            expect(result).toBeCloseTo(0.15, 2);
+        });
+
+        test('should fix floating-point errors with repeated additions', () => {
+            // Simulate adding 0.05 multiple times
+            let value = 1;
+            for (let i = 0; i < 10; i++) {
+                value += 0.05;
+            }
+            // value should be 1.5 but might be 1.4999999999999998
+            const result = roundToStepPrecision(value, 0.05);
+            expect(result).toBeCloseTo(1.5, 2);
+        });
+
+        test('should fix floating-point errors with step=0.1', () => {
+            // Known floating-point issue: 0.1 + 0.2 = 0.30000000000000004
+            const value = 0.1 + 0.2;
+            const result = roundToStepPrecision(value, 0.1);
+            expect(result).toBeCloseTo(0.3, 1);
+        });
+
+        test('should fix floating-point errors with step=0.01', () => {
+            // Known floating-point issue: 0.01 + 0.02 = 0.029999999999999999
+            const value = 0.01 + 0.02;
+            const result = roundToStepPrecision(value, 0.01);
+            expect(result).toBeCloseTo(0.03, 2);
+        });
+
+        test('should fix floating-point errors with step=0.25', () => {
+            const value = 0.5 + 0.25;
+            const result = roundToStepPrecision(value, 0.25);
+            expect(result).toBeCloseTo(0.75, 2);
+        });
+
+        test('should handle classic 0.1 + 0.2 problem', () => {
+            // Classic JavaScript floating-point issue
+            const value = 0.1 + 0.2;
+            // Without rounding: 0.30000000000000004
+            const result = roundToStepPrecision(value, 0.1);
+            expect(result).toBe(0.3);
+        });
+    });
+
+    describe('edge cases', () => {
+        test('should return value unchanged when step <= 0', () => {
+            expect(roundToStepPrecision(5, 0)).toBe(5);
+            expect(roundToStepPrecision(5, -1)).toBe(5);
+            expect(roundToStepPrecision(5, -0.5)).toBe(5);
+        });
+
+        test('should handle zero value', () => {
+            expect(roundToStepPrecision(0, 0.1)).toBe(0);
+            expect(roundToStepPrecision(0, 0.01)).toBe(0);
+        });
+
+        test('should handle negative values', () => {
+            expect(roundToStepPrecision(-1.234, 0.01)).toBeCloseTo(-1.23);
+            expect(roundToStepPrecision(-0.15, 0.05)).toBeCloseTo(-0.15);
+            expect(roundToStepPrecision(-5.5, 0.5)).toBeCloseTo(-5.5);
+        });
+
+        test('should handle very small step values', () => {
+            expect(roundToStepPrecision(1.1234, 0.0001)).toBeCloseTo(1.1234);
+            expect(roundToStepPrecision(1.12345, 0.0001)).toBeCloseTo(1.1235);
+        });
+
+        test('should handle very large values', () => {
+            expect(roundToStepPrecision(12345.6789, 0.01)).toBeCloseTo(12345.68);
+            expect(roundToStepPrecision(99999.9999, 0.001)).toBeCloseTo(100000);
+        });
+    });
+
+    describe('special number values', () => {
+        test('should handle Infinity', () => {
+            expect(roundToStepPrecision(Infinity, 0.1)).toBe(Infinity);
+            expect(roundToStepPrecision(-Infinity, 0.1)).toBe(-Infinity);
+        });
+
+        test('should handle NaN', () => {
+            expect(roundToStepPrecision(NaN, 0.1)).toBeNaN();
+        });
+
+        test('should handle step=Infinity', () => {
+            // getDecimalPlaces(Infinity) returns 0, so this rounds to 0 decimal places (integer)
+            const result = roundToStepPrecision(1.234, Infinity);
+            expect(result).toBeCloseTo(1);
+        });
+    });
+
+    describe('real-world scenarios', () => {
+        test('should handle currency calculations with step=0.01', () => {
+            // Add items with tax that might have floating-point errors
+            const subtotal = 10.99 + 5.99 + 2.99;
+            const rounded = roundToStepPrecision(subtotal, 0.01);
+            expect(rounded).toBeCloseTo(19.97, 2);
+        });
+
+        test('should handle slider values with step=0.1', () => {
+            // Slider value after multiple increments
+            let sliderValue = 0;
+            for (let i = 0; i < 15; i++) {
+                sliderValue += 0.1;
+            }
+            const rounded = roundToStepPrecision(sliderValue, 0.1);
+            expect(rounded).toBeCloseTo(1.5, 1);
+        });
+
+        test('should handle font size adjustments with step=0.5', () => {
+            // Font size adjustments
+            let fontSize = 12;
+            fontSize += 0.5; // 12.5
+            fontSize += 0.5; // 13.0
+            const rounded = roundToStepPrecision(fontSize, 0.5);
+            expect(rounded).toBeCloseTo(13, 1);
+        });
+
+        test('should handle opacity values with step=0.05', () => {
+            // Opacity from 0 to 1 in 5% increments
+            let opacity = 0;
+            for (let i = 0; i < 10; i++) {
+                opacity += 0.05;
+            }
+            const rounded = roundToStepPrecision(opacity, 0.05);
+            expect(rounded).toBeCloseTo(0.5, 2);
+        });
+
+        test('should handle percentage calculations with step=0.01', () => {
+            // Calculate percentage with floating-point issues
+            const percentage = (1 / 3) * 100;
+            const rounded = roundToStepPrecision(percentage, 0.01);
+            expect(rounded).toBeCloseTo(33.33, 2);
+        });
+
+        test('should handle coordinate rounding with step=0.000001', () => {
+            // GPS coordinates with micro-degree precision
+            const lat = 40.7128 + 0.000001;
+            const rounded = roundToStepPrecision(lat, 0.000001);
+            expect(rounded).toBeCloseTo(40.712801, 6);
+        });
+
+        test('should handle time values with step=0.001', () => {
+            // Millisecond precision timing
+            const time = 123.456 + 0.001 + 0.001;
+            const rounded = roundToStepPrecision(time, 0.001);
+            expect(rounded).toBeCloseTo(123.458, 3);
+        });
+    });
+
+    describe('common step values', () => {
+        test('should correctly round for step=0.05', () => {
+            // step=0.05 has 2 decimal places, so it rounds to 2 decimal places
+            // Note: This rounds to the DECIMAL PRECISION, not to the step increment
+            expect(roundToStepPrecision(1.34, 0.05)).toBeCloseTo(1.34);
+            expect(roundToStepPrecision(1.36, 0.05)).toBeCloseTo(1.36);
+            expect(roundToStepPrecision(1.37, 0.05)).toBeCloseTo(1.37);
+            expect(roundToStepPrecision(1.38, 0.05)).toBeCloseTo(1.38);
+        });
+
+        test('should correctly round for step=0.25', () => {
+            // step=0.25 has 2 decimal places, so it rounds to 2 decimal places
+            // Note: This rounds to the DECIMAL PRECISION, not to the step increment
+            expect(roundToStepPrecision(1.24, 0.25)).toBeCloseTo(1.24);
+            expect(roundToStepPrecision(1.26, 0.25)).toBeCloseTo(1.26);
+            expect(roundToStepPrecision(1.37, 0.25)).toBeCloseTo(1.37);
+            expect(roundToStepPrecision(1.38, 0.25)).toBeCloseTo(1.38);
+        });
+
+        test('should correctly round for step=0.1', () => {
+            // step=0.1 has 1 decimal place, so it rounds to 1 decimal place
+            expect(roundToStepPrecision(1.04, 0.1)).toBeCloseTo(1.0);
+            expect(roundToStepPrecision(1.05, 0.1)).toBeCloseTo(1.1);
+            expect(roundToStepPrecision(1.14, 0.1)).toBeCloseTo(1.1);
+            expect(roundToStepPrecision(1.15, 0.1)).toBeCloseTo(1.1); // standard banker's rounding
+        });
+
+        test('should correctly round for step=0.01', () => {
+            expect(roundToStepPrecision(1.234, 0.01)).toBeCloseTo(1.23);
+            expect(roundToStepPrecision(1.235, 0.01)).toBeCloseTo(1.24);
+            expect(roundToStepPrecision(1.236, 0.01)).toBeCloseTo(1.24);
+        });
+    });
+
+    describe('integration with getDecimalPlaces', () => {
+        test('should use correct decimal places from step parameter', () => {
+            // step=0.1 has 1 decimal place
+            expect(roundToStepPrecision(1.234, 0.1)).toBeCloseTo(1.2);
+            // step=0.01 has 2 decimal places
+            expect(roundToStepPrecision(1.234, 0.01)).toBeCloseTo(1.23);
+            // step=0.001 has 3 decimal places
+            expect(roundToStepPrecision(1.2345, 0.001)).toBeCloseTo(1.235);
+        });
+
+        test('should handle steps with different precisions correctly', () => {
+            const value = 1.123456789;
+
+            expect(roundToStepPrecision(value, 0.1)).toBeCloseTo(1.1);
+            expect(roundToStepPrecision(value, 0.01)).toBeCloseTo(1.12);
+            expect(roundToStepPrecision(value, 0.001)).toBeCloseTo(1.123);
+            expect(roundToStepPrecision(value, 0.0001)).toBeCloseTo(1.1235);
+        });
+    });
+
+    describe('return type behavior', () => {
+        test('should return finite number for valid inputs', () => {
+            expect(Number.isFinite(roundToStepPrecision(1.23, 0.01))).toBe(true);
+        });
+    });
+
+    describe('precision edge cases', () => {
+        test('should round 0.9999 correctly with step=0.01', () => {
+            expect(roundToStepPrecision(0.9999, 0.01)).toBeCloseTo(1);
+        });
+
+        test('should round 0.99999 correctly with step=0.001', () => {
+            expect(roundToStepPrecision(0.99999, 0.001)).toBeCloseTo(1);
+        });
+
+        test('should handle rounding up to next integer', () => {
+            expect(roundToStepPrecision(0.999, 0.001)).toBeCloseTo(0.999);
+        });
+
+        test('should handle values just below step boundary', () => {
+            expect(roundToStepPrecision(1.4999, 0.01)).toBeCloseTo(1.5);
+            expect(roundToStepPrecision(1.499, 0.01)).toBeCloseTo(1.5);
+        });
+    });
+});

src/shared/lib/utils/roundToStepPrecision/roundToStepPrecision.ts

@@ -0,0 +1,24 @@
+import { getDecimalPlaces } from '$shared/lib/utils';
+
+/**
+ * Round a value to the precision of the given step
+ *
+ * This fixes floating-point precision errors that occur with decimal steps.
+ * For example, with step=0.05, adding it repeatedly can produce values like
+ * 1.3499999999999999 instead of 1.35.
+ *
+ * We use toFixed() to round to the appropriate decimal places instead of
+ * Math.round(value / step) * step, which doesn't always work correctly
+ * due to floating-point arithmetic errors.
+ *
+ * @param value - The value to round
+ * @param step - The step to round to (defaults to 1)
+ * @returns The rounded value
+ */
+export function roundToStepPrecision(value: number, step: number = 1): number {
+    if (step <= 0) {
+        return value;
+    }
+    const decimals = getDecimalPlaces(step);
+    return parseFloat(value.toFixed(decimals));
+}

src/shared/ui/CheckboxFilter/CheckboxFilter.svelte

@@ -1,5 +1,5 @@
 <script lang="ts">
-import type { Property } from '$shared/lib/store';
+import type { Filter } from '$shared/lib';
 import { Badge } from '$shared/shadcn/ui/badge';
 import { buttonVariants } from '$shared/shadcn/ui/button';
 import { Checkbox } from '$shared/shadcn/ui/checkbox';
@@ -26,13 +26,11 @@ import { slide } from 'svelte/transition';
 interface PropertyFilterProps {
     /** Label for this filter group (e.g., "Properties", "Tags") */
     displayedLabel: string;
-    /** Array of properties with their selection states */
+    /** Filter entity */
-    properties: Property[];
+    filter: Filter;
-    /** Callback when a property checkbox is toggled */
-    onPropertyToggle: (id: string) => void;
 }
 
-const { displayedLabel, properties, onPropertyToggle }: PropertyFilterProps = $props();
+const { displayedLabel, filter }: PropertyFilterProps = $props();
 
 // Toggle state - defaults to open for better discoverability
 let isOpen = $state(true);
@@ -63,8 +61,10 @@ const slideConfig = $derived({
 });
 
 // Derived for reactive updates when properties change - avoids recomputing on every render
-const selectedCount = $derived(properties.filter(c => c.selected).length);
+const selectedCount = $derived(filter.selectedCount);
 const hasSelection = $derived(selectedCount > 0);
+
+$inspect(filter.properties).with(console.trace);
 </script>
 
 <!-- Collapsible card wrapper with subtle hover state for affordance -->
@@ -114,7 +114,7 @@ const hasSelection = $derived(selectedCount > 0);
                 <div class="flex flex-col gap-0.5">
                     <!-- Each item: checkbox + label with interactive hover/focus states -->
                     <!-- Keyed by property.id for efficient DOM updates -->
-                    {#each properties as property (property.id)}
+                    {#each filter.properties as property (property.id)}
                         <Label
                             for={property.id}
                             class="
@@ -129,8 +129,7 @@ const hasSelection = $derived(selectedCount > 0);
                             -->
                             <Checkbox
                                 id={property.id}
-                                checked={property.selected}
+                                bind:checked={property.selected}
-                                onclick={() => onPropertyToggle(property.id)}
                                 class="
                                     shrink-0 cursor-pointer transition-all duration-150 ease-out
                                     data-[state=checked]:scale-100

src/shared/ui/ComboControl/ComboControl.svelte

@@ -1,4 +1,5 @@
 <script lang="ts">
+import type { TypographyControl } from '$shared/lib';
 import { Button } from '$shared/shadcn/ui/button';
 import * as ButtonGroup from '$shared/shadcn/ui/button-group';
 import { Input } from '$shared/shadcn/ui/input';
@@ -9,22 +10,6 @@ import PlusIcon from '@lucide/svelte/icons/plus';
 import type { ChangeEventHandler } from 'svelte/elements';
 
 interface ComboControlProps {
-    /**
-     * Controlled value
-     */
-    value: number;
-    /**
-     * Callback function to handle value change
-     */
-    onChange: (value: number) => void;
-    /**
-     * Callback function to handle increase
-     */
-    onIncrease: () => void;
-    /**
-     * Callback function to handle decrease
-     */
-    onDecrease: () => void;
     /**
      * Text for increase button aria-label
      */
@@ -33,59 +18,35 @@ interface ComboControlProps {
      * Text for decrease button aria-label
      */
     decreaseLabel?: string;
-    /**
-     * Flag for disabling increase button
-     */
-    increaseDisabled?: boolean;
-    /**
-     * Flag for disabling decrease button
-     */
-    decreaseDisabled?: boolean;
     /**
      * Text for control button aria-label
      */
     controlLabel?: string;
     /**
-     * Minimum value for the input
+     * Control instance
      */
-    minValue?: number;
+    control: TypographyControl;
-    /**
-     * Maximum value for the input
-     */
-    maxValue?: number;
-    /**
-     * Step value for the slider
-     */
-    step?: number;
 }
 
 const {
-    value,
+    control,
-    onChange,
-    onIncrease,
-    onDecrease,
-    increaseLabel,
     decreaseLabel,
-    increaseDisabled,
+    increaseLabel,
-    decreaseDisabled,
     controlLabel,
-    minValue = 0,
-    maxValue = 100,
-    step = 1,
 }: ComboControlProps = $props();
 
 // Local state for the slider to prevent infinite loops
-let sliderValue = $state(value);
+let sliderValue = $state(Number(control.value));
 
 // Sync sliderValue when external value changes
 $effect(() => {
-    sliderValue = value;
+    sliderValue = Number(control.value);
 });
 
 const handleInputChange: ChangeEventHandler<HTMLInputElement> = event => {
     const parsedValue = parseFloat(event.currentTarget.value);
     if (!isNaN(parsedValue)) {
-        onChange(parsedValue);
+        control.value = parsedValue;
     }
 };
 
@@ -93,8 +54,8 @@ const handleInputChange: ChangeEventHandler<HTMLInputElement> = event => {
  * Handle slider value change.
  * The Slider component passes the value as a number directly.
  */
-const handleSliderChange = (value: number) => {
+const handleSliderChange = (newValue: number) => {
-    onChange(value);
+    control.value = newValue;
 };
 </script>
 
@@ -103,8 +64,8 @@ const handleSliderChange = (value: number) => {
         variant="outline"
         size="icon"
         aria-label={decreaseLabel}
-        onclick={onDecrease}
+        onclick={control.decrease}
-        disabled={decreaseDisabled}
+        disabled={control.isAtMin}
     >
         <MinusIcon />
     </Button>
@@ -117,16 +78,16 @@ const handleSliderChange = (value: number) => {
                     size="icon"
                     aria-label={controlLabel}
                 >
-                    {value}
+                    {control.value}
                 </Button>
             {/snippet}
         </Popover.Trigger>
         <Popover.Content class="w-auto p-4">
             <div class="flex flex-col items-center gap-3">
                 <Slider
-                    min={minValue}
+                    min={control.min}
-                    max={maxValue}
+                    max={control.max}
-                    step={step}
+                    step={control.step}
                     value={sliderValue}
                     onValueChange={handleSliderChange}
                     type="single"
@@ -134,10 +95,10 @@ const handleSliderChange = (value: number) => {
                     class="h-48"
                 />
                 <Input
-                    value={String(value)}
+                    value={control.value}
-                    min={minValue}
-                    max={maxValue}
                     onchange={handleInputChange}
+                    min={control.min}
+                    max={control.max}
                     class="w-16 text-center"
                 />
             </div>
@@ -147,8 +108,8 @@ const handleSliderChange = (value: number) => {
         variant="outline"
         size="icon"
         aria-label={increaseLabel}
-        onclick={onIncrease}
+        onclick={control.increase}
-        disabled={increaseDisabled}
+        disabled={control.isAtMax}
     >
         <PlusIcon />
     </Button>

src/shared/ui/VirtualList/VirtualList.svelte

@@ -8,7 +8,7 @@
     - ARIA listbox/option pattern with single tab stop
 -->
 <script lang="ts" generics="T">
-import { createVirtualizer } from '$shared/lib/utils';
+import { createVirtualizer } from '$shared/lib';
 import { cn } from '$shared/shadcn/utils/shadcn-utils';
 import {
     type Snippet,

src/shared/ui/index.ts

@@ -4,6 +4,12 @@
  * Exports all shared UI components and their types
  */
 
+import CheckboxFilter from './CheckboxFilter/CheckboxFilter.svelte';
+import ComboControl from './ComboControl/ComboControl.svelte';
 import VirtualList from './VirtualList/VirtualList.svelte';
 
-export { VirtualList };
+export {
+    CheckboxFilter,
+    ComboControl,
+    VirtualList,
+};

src/widgets/FiltersSidebar/ui/Controls.svelte

@@ -10,12 +10,16 @@
  * Buttons are equally sized (flex-1) for balanced layout. Note:
  * Functionality not yet implemented - wire up to filter stores.
  */
-import { clearAllFilters } from '$features/FilterFonts';
+import { filterManager } from '$features/FilterFonts';
 import { Button } from '$shared/shadcn/ui/button';
 </script>
 
 <div class="flex flex-row gap-2">
-    <Button variant="outline" class="flex-1 cursor-pointer" onclick={clearAllFilters}>
+    <Button
+        variant="outline"
+        class="flex-1 cursor-pointer"
+        onclick={filterManager.deselectAllGlobal}
+    >
         Reset
     </Button>
     <Button class="flex-1 cursor-pointer">

src/widgets/FiltersSidebar/ui/Filters.svelte

@@ -12,31 +12,15 @@
  * Uses $derived for reactive access to filter states, ensuring UI updates
  * when selections change through any means (sidebar, programmatically, etc.).
  */
-import { categoryFilterStore } from '$features/FilterFonts';
+import { filterManager } from '$features/FilterFonts';
-import { providersFilterStore } from '$features/FilterFonts';
+import { CheckboxFilter } from '$shared/ui';
-import { subsetsFilterStore } from '$features/FilterFonts';
-import CheckboxFilter from '$shared/ui/CheckboxFilter/CheckboxFilter.svelte';
 
-/** Reactive properties from providers filter store */
+$inspect(filterManager.groups).with(console.trace);
-const { properties: providers } = $derived($providersFilterStore);
-/** Reactive properties from subsets filter store */
-const { properties: subsets } = $derived($subsetsFilterStore);
-/** Reactive properties from categories filter store */
-const { properties: categories } = $derived($categoryFilterStore);
 </script>
 
-<CheckboxFilter
+{#each filterManager.groups as group (group.id)}
-    displayedLabel="Font provider"
+    <CheckboxFilter
-    properties={providers}
+        displayedLabel={group.label}
-    onPropertyToggle={providersFilterStore.toggleProperty}
+        filter={group.instance}
-/>
+    />
-<CheckboxFilter
+{/each}
-    displayedLabel="Font subset"
-    properties={subsets}
-    onPropertyToggle={subsetsFilterStore.toggleProperty}
-/>
-<CheckboxFilter
-    displayedLabel="Font category"
-    properties={categories}
-    onPropertyToggle={categoryFilterStore.toggleProperty}
-/>