feat(speaking): add 8 placeholder video scene entries

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

src/views/Editor/EnglishSpeaking/data/topicDiscussionVideos.json

@@ -0,0 +1,50 @@
+[
+  {
+    "id": "v1",
+    "title": "Going to school",
+    "videoUrl": "https://example.com/videos/v1.mp4",
+    "description": "A child walks to school in the morning, passing a park and meeting friends at the bus stop."
+  },
+  {
+    "id": "v2",
+    "title": "Family breakfast",
+    "videoUrl": "https://example.com/videos/v2.mp4",
+    "description": "A family of four eats breakfast together; the parents prepare eggs while children pour milk."
+  },
+  {
+    "id": "v3",
+    "title": "At the zoo",
+    "videoUrl": "https://example.com/videos/v3.mp4",
+    "description": "Visitors watch pandas eating bamboo behind a glass enclosure on a sunny afternoon."
+  },
+  {
+    "id": "v4",
+    "title": "Library reading",
+    "videoUrl": "https://example.com/videos/v4.mp4",
+    "description": "A student picks a book from the shelf, sits at a long table, and reads quietly."
+  },
+  {
+    "id": "v5",
+    "title": "Birthday party",
+    "videoUrl": "https://example.com/videos/v5.mp4",
+    "description": "Children gather around a cake with candles, singing and clapping at a friend's birthday."
+  },
+  {
+    "id": "v6",
+    "title": "Rainy day",
+    "videoUrl": "https://example.com/videos/v6.mp4",
+    "description": "A person walks home in heavy rain holding a yellow umbrella, jumping over puddles."
+  },
+  {
+    "id": "v7",
+    "title": "Soccer practice",
+    "videoUrl": "https://example.com/videos/v7.mp4",
+    "description": "Kids practice dribbling and passing a soccer ball on a green grass field after school."
+  },
+  {
+    "id": "v8",
+    "title": "Cooking dinner",
+    "videoUrl": "https://example.com/videos/v8.mp4",
+    "description": "A teenager helps a parent chop vegetables and stir a pot in a brightly lit kitchen."
+  }
+]