feat(viewer,ui04): E02 static fidelity — real photo fixtures, measured shell/photo/collapse specs, edge fade

- fixtures: 8 picsum-seeded real photos (mixed ratios); seedPhoto thumbBytes/browseBytes injection
- e2e E02 block: wrapper shell (195x280/radius/border/#10161E), photo strip (193w, ratio-height, 3px gap), collapse (44/44 hit, 24 visual, sole button), desktop+mobile screenshots
- EmbedStream: top/bottom 12px dark fade (0.12, §2.3 optional item)
- fix(admin): pre-existing eslint globals gap for ElNotification (template drift, blocks lint gate)

Co-Authored-By: Claude Code <noreply@anthropic.com>

apps/admin/eslint.config.mjs

@@ -47,7 +47,10 @@ export default [
         // 合并从 autoImportConfig 中读取的全局变量配置
         ...autoImportConfig.globals,
         // TypeScript 全局命名空间
-        Api: 'readonly'
+        Api: 'readonly',
+        // login/index.vue 使用但 .auto-import.json 生成缓存缺登（types/import/
+        // auto-imports.d.ts 已声明；UI-04 E02 登记的模板存量偏差最小修复）
+        ElNotification: 'readonly'
       }
     },
     rules: {