feat(Dashboard): 重构仪表板功能组件和逻辑

- 新增 dashboardFeatures.ts 和 useDashboard.ts 文件，封装仪表板功能的解析和状态管理逻辑。
- 更新 Dashboard 组件，使用 useDashboard 钩子简化可见工具和最近使用工具的处理。
- 添加仪表板功能的单元测试，确保功能正确性。
- 更新 README.md，移除不再使用的 ToolCard 组件说明。

src/pages/Dashboard/index.tsx

@@ -1,28 +1,11 @@
-import { useRouter } from '@/providers/RouterProvider';
-import { getFeatureByKey } from '@/config/features';
-import type { PageType } from '@/types/storage';
 import { cn } from '@/lib/utils';
+import { useDashboard } from './useDashboard';
 
 export default function Index() {
-  const { navigateTo, visiblePages, pageOrder, recentlyUsedTools } = useRouter();
-
-  const visibleSet = new Set<string>(visiblePages);
-
-  const visibleFeatures = pageOrder
-    .filter((key) => visibleSet.has(key))
-    .map((key) => ({ key, feature: getFeatureByKey(key) }))
-    .filter((item) => item.feature?.themeColorKey && item.feature.icon != null);
-
-  const recentFeatures = recentlyUsedTools
-    .filter((key) => visibleSet.has(key))
-    .map((key) => ({ key, feature: getFeatureByKey(key) }))
-    .filter((item) => item.feature?.themeColorKey && item.feature.icon != null);
-
-  const showRecent = recentFeatures.length > 0;
+  const { visibleFeatures, recentFeatures, showRecent, navigateTo } = useDashboard();
 
   return (
     <div className={cn('flex flex-col gap-4 p-3.5 w-full h-auto select-none')}>
-      {/* 最近使用 */}
       {showRecent && (
         <div className="flex flex-col gap-2">
           <h3 className="text-xs font-semibold text-muted-foreground/80 uppercase tracking-wider">
@@ -30,12 +13,12 @@ export default function Index() {
           </h3>
           <div className="flex flex-wrap gap-2">
             {recentFeatures.map(({ key, feature }) => {
-              const IconComponent = feature!.icon!;
+              const IconComponent = feature.icon;
               return (
                 <button
                   key={key}
                   type="button"
-                  onClick={() => navigateTo(key as PageType)}
+                  onClick={() => navigateTo(key)}
                   className={cn(
                     'inline-flex items-center gap-1.5 px-3 py-1.5 rounded-full text-xs font-medium',
                     'border border-border/60 bg-card text-card-foreground',
@@ -44,7 +27,7 @@ export default function Index() {
                   )}
                 >
                   <IconComponent className="h-3.5 w-3.5 text-muted-foreground/70" />
-                  {feature!.label}
+                  {feature.label}
                 </button>
               );
             })}
@@ -52,40 +35,45 @@ export default function Index() {
         </div>
       )}
 
-      {/* 全部工具 — 紧凑 Grid */}
       <div className="flex flex-col gap-2">
         <h3 className="text-xs font-semibold text-muted-foreground/80 uppercase tracking-wider">
           {'全部工具'}
         </h3>
-        <div className={cn('grid grid-cols-3 sm:grid-cols-4 md:grid-cols-5 lg:grid-cols-6 gap-2')}>
-          {visibleFeatures.map(({ key, feature }) => {
-            const IconComponent = feature!.icon!;
-            return (
-              <button
-                key={key}
-                type="button"
-                onClick={() => navigateTo(key as PageType)}
-                className={cn(
-                  'group flex flex-col items-center justify-center gap-1.5',
-                  'py-3 px-2 rounded-xl border border-border/50 bg-card',
-                  'hover:bg-muted/40 hover:border-primary/30',
-                  'transition-colors cursor-pointer',
-                )}
-              >
-                <IconComponent
+        {visibleFeatures.length === 0 ? (
+          <p className="text-sm text-muted-foreground py-4 text-center">{'没有可用的工具'}</p>
+        ) : (
+          <div
+            className={cn('grid grid-cols-3 sm:grid-cols-4 md:grid-cols-5 lg:grid-cols-6 gap-2')}
+          >
+            {visibleFeatures.map(({ key, feature }) => {
+              const IconComponent = feature.icon;
+              return (
+                <button
+                  key={key}
+                  type="button"
+                  onClick={() => navigateTo(key)}
                   className={cn(
-                    'h-5 w-5 text-muted-foreground/70',
-                    'group-hover:text-foreground',
-                    'transition-colors',
+                    'group flex flex-col items-center justify-center gap-1.5',
+                    'py-3 px-2 rounded-xl border border-border/50 bg-card',
+                    'hover:bg-muted/40 hover:border-primary/30',
+                    'transition-colors cursor-pointer',
                   )}
-                />
-                <span className="text-[11px] font-medium text-muted-foreground/80 group-hover:text-foreground leading-tight text-center truncate w-full transition-colors">
-                  {feature!.label}
-                </span>
-              </button>
-            );
-          })}
-        </div>
+                >
+                  <IconComponent
+                    className={cn(
+                      'h-5 w-5 text-muted-foreground/70',
+                      'group-hover:text-foreground',
+                      'transition-colors',
+                    )}
+                  />
+                  <span className="text-[11px] font-medium text-muted-foreground/80 group-hover:text-foreground leading-tight text-center truncate w-full transition-colors">
+                    {feature.label}
+                  </span>
+                </button>
+              );
+            })}
+          </div>
+        )}
       </div>
     </div>
   );