fix(a11y): label associations for AdminNewsCreate fields

- htmlFor/id pairs for title, slug, read-time, excerpt and featured-image inputs
- add an ariaLabel prop to ColoredItemCombobox (applied to the trigger button) and
  pass the category/tag labels so the comboboxes have an accessible name (WCAG 1.3.1/4.1.2)

src/components/admin/ColoredItemCombobox.tsx

@@ -27,6 +27,7 @@ interface ColoredItemComboboxProps {
   onCreateNew: (name: string, color: string) => Promise<ColoredItem>;
   onDelete?: (item: ColoredItem) => Promise<void>;
   placeholder?: string;
+  ariaLabel?: string;
   isLoading?: boolean;
   colors?: string[];
   className?: string;
@@ -39,6 +40,7 @@ export function ColoredItemCombobox({
   onCreateNew,
   onDelete,
   placeholder,
+  ariaLabel,
   isLoading = false,
   colors = DEFAULT_COLORS,
   className,
@@ -190,6 +192,7 @@ export function ColoredItemCombobox({
           isOpen ? 'border-accent-500/50' : 'border-dark-700 hover:border-dark-600',
           isLoading && 'animate-pulse',
         )}
+        aria-label={ariaLabel}
         aria-expanded={isOpen}
         aria-haspopup="listbox"
       >

src/pages/AdminNewsCreate.tsx

@@ -652,8 +652,11 @@ export default function AdminNewsCreate() {
       <div className="space-y-5">
         {/* Title */}
         <div>
-          <label className="label">{t('news.admin.titleLabel')}</label>
+          <label htmlFor="news-title" className="label">
+            {t('news.admin.titleLabel')}
+          </label>
           <input
+            id="news-title"
             type="text"
             value={title}
             onChange={(e) => setTitle(e.target.value)}
@@ -664,8 +667,11 @@ export default function AdminNewsCreate() {
 
         {/* Slug */}
         <div>
-          <label className="label">{t('news.admin.slugLabel')}</label>
+          <label htmlFor="news-slug" className="label">
+            {t('news.admin.slugLabel')}
+          </label>
           <input
+            id="news-slug"
             type="text"
             value={slug}
             onChange={(e) => {
@@ -688,6 +694,7 @@ export default function AdminNewsCreate() {
               onCreateNew={handleCreateCategory}
               onDelete={handleDeleteCategory}
               placeholder={t('news.admin.combobox.selectCategory')}
+              ariaLabel={t('news.admin.categoryLabel')}
             />
           </div>
           <div>
@@ -699,14 +706,18 @@ export default function AdminNewsCreate() {
               onCreateNew={handleCreateTag}
               onDelete={handleDeleteTag}
               placeholder={t('news.admin.combobox.selectTag')}
+              ariaLabel={t('news.admin.tagLabel')}
             />
           </div>
         </div>
 
         {/* Read time */}
         <div>
-          <label className="label">{t('news.admin.readTimeLabel')}</label>
+          <label htmlFor="news-readtime" className="label">
+            {t('news.admin.readTimeLabel')}
+          </label>
           <input
+            id="news-readtime"
             type="number"
             value={readTimeMinutes}
             onChange={(e) => setReadTimeMinutes(Number(e.target.value) || 1)}
@@ -718,8 +729,11 @@ export default function AdminNewsCreate() {
 
         {/* Excerpt */}
         <div>
-          <label className="label">{t('news.admin.excerptLabel')}</label>
+          <label htmlFor="news-excerpt" className="label">
+            {t('news.admin.excerptLabel')}
+          </label>
           <textarea
+            id="news-excerpt"
             value={excerpt}
             onChange={(e) => setExcerpt(e.target.value)}
             className="input min-h-[80px] resize-y"
@@ -729,9 +743,12 @@ export default function AdminNewsCreate() {
 
         {/* Featured Image URL */}
         <div>
-          <label className="label">{t('news.admin.imageLabel')}</label>
+          <label htmlFor="news-image" className="label">
+            {t('news.admin.imageLabel')}
+          </label>
           <div className="flex items-center gap-2">
             <input
+              id="news-image"
               type="text"
               value={featuredImageUrl}
               onChange={(e) => setFeaturedImageUrl(e.target.value)}