feat: add aigc record, video preview & custom recharge

- create useAigcRecordStore to centralize current AIGC generation record state
- add video media type support to ResultPreview component
- update RecordCard to only display view button for completed tasks
- implement custom recharge amount with input validation and 9999 max limit
- refactor detail page to load record from Pinia store instead of mock data
- clean up TemplateCarousel markup and remove unused badge styles
- fix minor formatting and code style issues

src/pages-aigc/detail/components/ResultPreview/index.vue

@@ -1,6 +1,13 @@
 <template>
   <view class="result-preview" :style="{ '--result-accent': result.accent }">
-    <image class="result-preview-image" :src="result.cover" mode="aspectFill" />
+    <video
+      v-if="result.mediaType === 'video'"
+      class="result-preview-image"
+      :src="result.cover"
+      controls
+      object-fit="cover"
+    />
+    <image v-else class="result-preview-image" :src="result.cover" mode="aspectFill" />
     <view class="result-preview-shade" />
 
     <view class="result-preview-caption">