feat(ui): click outside the image in the viewer modal closes it (parity with IR)

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

frontend/src/components/modal/VideoCanvas.vue

@@ -1,10 +1,11 @@
 <template>
-  <div class="fc-canvas fc-canvas--video">
+  <div class="fc-canvas fc-canvas--video" @click.self="$emit('close-request')">
     <video
       v-if="playable" :src="src" controls playsinline preload="metadata"
       class="fc-canvas__video"
+      @click.stop
     />
-    <div v-else class="fc-canvas__unsupported">
+    <div v-else class="fc-canvas__unsupported" @click.stop>
       <v-icon size="56" icon="mdi-video-off-outline" />
       <h3 class="fc-canvas__unsupported-title">Format not browser-playable</h3>
       <p>
@@ -23,6 +24,7 @@
 <script setup>
 import { computed } from 'vue'
 
+defineEmits(['close-request'])
 const props = defineProps({ src: String, mime: String })
 
 const BROWSER_PLAYABLE = new Set([