feat(reports/category): replace select with searchable combobox (#103)

Swap the native <select> in CategoryZoomHeader for the reusable
CategoryCombobox. Enhances the combobox with ARIA compliance
(combobox, listbox, option roles + aria-expanded, aria-controls,
aria-activedescendant) and hierarchy indentation based on parent_id
depth. Adds reports.category.searchPlaceholder in FR/EN.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

CHANGELOG.fr.md

@@ -5,6 +5,9 @@
 ### Ajouté
 - **Rapport Cartes** : info-bulle d'aide sur le KPI taux d'épargne expliquant la formule — `(revenus − dépenses) ÷ revenus × 100`, calculée sur le mois de référence (#101)
 
+### Modifié
+- **Rapport Zoom catégorie** (`/reports/category`) : le sélecteur de catégorie est désormais un combobox saisissable et filtrable avec recherche insensible aux accents, navigation clavier (↑/↓/Entrée/Échap) et indentation hiérarchique, en remplacement du `<select>` natif (#103)
+
 ### Corrigé
 - **Rapport Cartes** : retrait du sélecteur de période non fonctionnel — le rapport Cartes est un instantané « mois X vs X-1 vs X-12 », seul le sélecteur de mois de référence est nécessaire (#101)
 - **Rapport Cartes** : le KPI taux d'épargne affiche maintenant « — » au lieu de « 0 % » lorsque le mois de référence n'a aucun revenu (une division par zéro est indéfinie, pas zéro) (#101)

CHANGELOG.md

@@ -5,6 +5,9 @@
 ### Added
 - **Cartes report**: help tooltip on the savings-rate KPI explaining the formula — `(income − expenses) ÷ income × 100`, computed on the reference month (#101)
 
+### Changed
+- **Category zoom report** (`/reports/category`): the category picker is now a typeable, searchable combobox with accent-insensitive matching, keyboard navigation (↑/↓/Enter/Esc) and hierarchy indentation, replacing the native `<select>` (#103)
+
 ### Fixed
 - **Cartes report**: removed the non-functional period selector — the Cartes report is a "month X vs X-1 vs X-12" snapshot, so only the reference-month picker is needed (#101)
 - **Cartes report**: savings-rate KPI now shows "—" instead of "0 %" when the reference month has no income (division by zero is undefined, not zero) (#101)

src/components/reports/CategoryZoomHeader.tsx

@@ -1,13 +1,8 @@
 import { useEffect, useState } from "react";
 import { useTranslation } from "react-i18next";
 import { getAllCategoriesWithCounts } from "../../services/categoryService";
-
-interface CategoryOption {
-  id: number;
-  name: string;
-  color: string | null;
-  parent_id: number | null;
-}
+import CategoryCombobox from "../shared/CategoryCombobox";
+import type { Category } from "../../shared/types";
 
 export interface CategoryZoomHeaderProps {
   categoryId: number | null;
@@ -23,13 +18,24 @@ export default function CategoryZoomHeader({
   onIncludeSubcategoriesChange,
 }: CategoryZoomHeaderProps) {
   const { t } = useTranslation();
-  const [categories, setCategories] = useState<CategoryOption[]>([]);
+  const [categories, setCategories] = useState<Category[]>([]);
 
   useEffect(() => {
     getAllCategoriesWithCounts()
       .then((rows) =>
         setCategories(
-          rows.map((r) => ({ id: r.id, name: r.name, color: r.color, parent_id: r.parent_id })),
+          rows.map((r) => ({
+            id: r.id,
+            name: r.name,
+            parent_id: r.parent_id ?? undefined,
+            color: r.color ?? undefined,
+            icon: r.icon ?? undefined,
+            type: r.type,
+            is_active: r.is_active,
+            is_inputable: r.is_inputable,
+            sort_order: r.sort_order,
+            created_at: "",
+          })),
         ),
       )
       .catch(() => setCategories([]));
@@ -41,18 +47,13 @@ export default function CategoryZoomHeader({
         <span className="text-xs font-medium text-[var(--muted-foreground)] uppercase tracking-wide">
           {t("reports.category.selectCategory")}
         </span>
-        <select
-          value={categoryId ?? ""}
-          onChange={(e) => onCategoryChange(e.target.value ? Number(e.target.value) : null)}
-          className="bg-[var(--card)] border border-[var(--border)] rounded-lg px-3 py-2 text-sm"
-        >
-          <option value="">—</option>
-          {categories.map((cat) => (
-            <option key={cat.id} value={cat.id}>
-              {cat.name}
-            </option>
-          ))}
-        </select>
+        <CategoryCombobox
+          categories={categories}
+          value={categoryId}
+          onChange={onCategoryChange}
+          placeholder={t("reports.category.searchPlaceholder")}
+          ariaLabel={t("reports.category.selectCategory")}
+        />
       </label>
       <label className="inline-flex items-center gap-2 text-sm">
         <input

src/components/shared/CategoryCombobox.tsx

@@ -1,4 +1,4 @@
-import { useState, useRef, useEffect, useCallback } from "react";
+import { useState, useRef, useEffect, useCallback, useId, useMemo } from "react";
 import type { Category } from "../../shared/types";
 
 interface CategoryComboboxProps {
@@ -7,6 +7,7 @@ interface CategoryComboboxProps {
   onChange: (id: number | null) => void;
   placeholder?: string;
   compact?: boolean;
+  ariaLabel?: string;
   /** Extra options shown before the category list (e.g. "All categories", "Uncategorized") */
   extraOptions?: Array<{ value: string; label: string }>;
   /** Called when an extra option is selected */
@@ -15,12 +16,40 @@ interface CategoryComboboxProps {
   activeExtra?: string | null;
 }
 
+// Strip accents + lowercase for accent-insensitive matching
+function normalize(s: string): string {
+  return s.normalize("NFD").replace(/[\u0300-\u036f]/g, "").toLowerCase();
+}
+
+// Compute depth of each category based on parent_id chain
+function computeDepths(categories: Category[]): Map<number, number> {
+  const byId = new Map<number, Category>();
+  for (const c of categories) byId.set(c.id, c);
+  const depths = new Map<number, number>();
+  function depthOf(id: number, seen: Set<number>): number {
+    if (depths.has(id)) return depths.get(id)!;
+    if (seen.has(id)) return 0;
+    seen.add(id);
+    const cat = byId.get(id);
+    if (!cat || cat.parent_id == null) {
+      depths.set(id, 0);
+      return 0;
+    }
+    const d = depthOf(cat.parent_id, seen) + 1;
+    depths.set(id, d);
+    return d;
+  }
+  for (const c of categories) depthOf(c.id, new Set());
+  return depths;
+}
+
 export default function CategoryCombobox({
   categories,
   value,
   onChange,
   placeholder = "",
   compact = false,
+  ariaLabel,
   extraOptions,
   onExtraSelect,
   activeExtra,
@@ -31,19 +60,18 @@ export default function CategoryCombobox({
   const inputRef = useRef<HTMLInputElement>(null);
   const listRef = useRef<HTMLUListElement>(null);
   const containerRef = useRef<HTMLDivElement>(null);
+  const baseId = useId();
+  const listboxId = `${baseId}-listbox`;
+  const optionId = (i: number) => `${baseId}-option-${i}`;
+
+  const depths = useMemo(() => computeDepths(categories), [categories]);
 
-  // Build display label
   const selectedCategory = categories.find((c) => c.id === value);
   const displayLabel =
     activeExtra != null
       ? extraOptions?.find((o) => o.value === activeExtra)?.label ?? ""
       : selectedCategory?.name ?? "";
 
-  // Strip accents + lowercase for accent-insensitive matching
-  const normalize = (s: string) =>
-    s.normalize("NFD").replace(/[\u0300-\u036f]/g, "").toLowerCase();
-
-  // Filter categories
   const normalizedQuery = normalize(query);
   const filtered = query
     ? categories.filter((c) => normalize(c.name).includes(normalizedQuery))
@@ -57,7 +85,6 @@ export default function CategoryCombobox({
 
   const totalItems = filteredExtras.length + filtered.length;
 
-  // Scroll highlighted item into view
   useEffect(() => {
     if (open && listRef.current) {
       const el = listRef.current.children[highlightIndex] as HTMLElement | undefined;
@@ -65,7 +92,6 @@ export default function CategoryCombobox({
     }
   }, [highlightIndex, open]);
 
-  // Close on outside click
   useEffect(() => {
     if (!open) return;
     const handler = (e: MouseEvent) => {
@@ -128,11 +154,19 @@ export default function CategoryCombobox({
   const py = compact ? "py-1" : "py-2";
   const px = compact ? "px-2" : "px-3";
 
+  const activeId = open && totalItems > 0 ? optionId(highlightIndex) : undefined;
+
   return (
     <div ref={containerRef} className="relative">
       <input
         ref={inputRef}
         type="text"
+        role="combobox"
+        aria-label={ariaLabel}
+        aria-expanded={open}
+        aria-controls={listboxId}
+        aria-autocomplete="list"
+        aria-activedescendant={activeId}
         value={open ? query : displayLabel}
         placeholder={placeholder || displayLabel}
         onChange={(e) => {
@@ -151,11 +185,16 @@ export default function CategoryCombobox({
       {open && totalItems > 0 && (
         <ul
           ref={listRef}
+          id={listboxId}
+          role="listbox"
           className="absolute z-50 mt-1 max-h-60 w-full overflow-auto rounded-lg border border-[var(--border)] bg-[var(--card)] shadow-lg"
         >
           {filteredExtras.map((opt, i) => (
             <li
               key={`extra-${opt.value}`}
+              id={optionId(i)}
+              role="option"
+              aria-selected={i === highlightIndex}
               onMouseDown={(e) => e.preventDefault()}
               onClick={() => selectItem(i)}
               onMouseEnter={() => setHighlightIndex(i)}
@@ -170,9 +209,14 @@ export default function CategoryCombobox({
           ))}
           {filtered.map((cat, i) => {
             const idx = filteredExtras.length + i;
+            const depth = depths.get(cat.id) ?? 0;
+            const indent = depth > 0 ? "  ".repeat(depth) : "";
             return (
               <li
                 key={cat.id}
+                id={optionId(idx)}
+                role="option"
+                aria-selected={idx === highlightIndex}
                 onMouseDown={(e) => e.preventDefault()}
                 onClick={() => selectItem(idx)}
                 onMouseEnter={() => setHighlightIndex(idx)}
@@ -181,7 +225,9 @@ export default function CategoryCombobox({
                     ? "bg-[var(--primary)] text-white"
                     : "text-[var(--foreground)] hover:bg-[var(--muted)]"
                 }`}
+                style={depth > 0 ? { paddingLeft: `calc(${compact ? "0.5rem" : "0.75rem"} + ${depth * 1}rem)` } : undefined}
               >
+                <span className="whitespace-pre">{indent}</span>
                 {cat.name}
               </li>
             );

src/i18n/locales/en.json

@@ -435,6 +435,7 @@
     },
     "category": {
       "selectCategory": "Select a category",
+      "searchPlaceholder": "Search a category…",
       "includeSubcategories": "Include subcategories",
       "directOnly": "Direct only",
       "breakdown": "Total",

src/i18n/locales/fr.json

@@ -435,6 +435,7 @@
     },
     "category": {
       "selectCategory": "Choisir une catégorie",
+      "searchPlaceholder": "Rechercher une catégorie…",
       "includeSubcategories": "Inclure les sous-catégories",
       "directOnly": "Directe seulement",
       "breakdown": "Total",