feat(pokemon): add image selection and display from pokesprite

Add image metadata fields to Pokemon schema and API
Implement image candidate fetching from pokesprite static tree
Add Pokédex-style image picker to edit form and display in details

system-wordings.ts

@@ -114,6 +114,17 @@ export const systemWordingMessages = {
         fetchSearching: 'Searching data',
         fetchNoMatches: 'No matching Pokemon data',
         fetchSearchFailed: 'Pokemon data search failed',
+        image: 'Image',
+        fetchImages: 'Fetch images',
+        fetchingImages: 'Fetching',
+        imageFetchFailed: 'Pokemon image fetch failed',
+        imageNoMatches: 'No available Pokemon images',
+        loadingImages: 'Loading Pokemon images',
+        selectedImage: 'Selected Pokemon image',
+        imageOptions: 'Pokemon image options',
+        clearImage: 'Clear image',
+        imageEmpty: 'No Pokemon image selected',
+        imageAlt: '{name} {variant} image',
         loadingList: 'Loading Pokemon list',
         loadingDetail: 'Loading Pokemon detail',
         loadingEdit: 'Loading Pokemon editor',
@@ -530,6 +541,7 @@ export const systemWordingMessages = {
       pokemonIdentifierRequired: 'Pokemon identifier is required',
       pokemonTypeDataUnavailable: 'Pokemon type data is unavailable',
       pokemonDataNotFound: 'Pokemon data was not found',
+      pokemonImagePathInvalid: 'Pokemon image path is invalid',
       taskRequired: 'Please enter a task',
       selectTask: 'Please select a task',
       taskDoesNotExist: 'Task does not exist',
@@ -691,6 +703,17 @@ export const systemWordingMessages = {
         fetchSearching: '正在搜索数据',
         fetchNoMatches: '没有匹配的 Pokemon 数据',
         fetchSearchFailed: 'Pokemon 数据搜索失败',
+        image: '图片',
+        fetchImages: '获取图片',
+        fetchingImages: '正在获取',
+        imageFetchFailed: 'Pokemon 图片获取失败',
+        imageNoMatches: '没有可用的 Pokemon 图片',
+        loadingImages: '正在加载 Pokemon 图片',
+        selectedImage: '已选择的 Pokemon 图片',
+        imageOptions: 'Pokemon 图片选项',
+        clearImage: '清除图片',
+        imageEmpty: '尚未选择 Pokemon 图片',
+        imageAlt: '{name} {variant} 图片',
         loadingList: '正在加载 Pokemon 列表',
         loadingDetail: '正在加载 Pokemon 详情',
         loadingEdit: '正在加载 Pokemon 编辑内容',
@@ -1107,6 +1130,7 @@ export const systemWordingMessages = {
         pokemonIdentifierRequired: '请输入 Pokemon 标识',
         pokemonTypeDataUnavailable: 'Pokemon 属性数据不可用',
         pokemonDataNotFound: '未找到 Pokemon 数据',
+        pokemonImagePathInvalid: 'Pokemon 图片路径不合法',
         taskRequired: '请输入任务',
         selectTask: '请选择任务',
         taskDoesNotExist: '任务不存在',