feat(home): redesign homepage per §16.3 — dynamic data, territory replay, compact layout

- Remove duplicate SWR cache (use shared fetchers from api-types.ts)
- Add territory view mode to featured replay embed
- Use demo replay fallback when no live matches available
- Compact layout with tighter spacing for 1080p above-the-fold
- Add missing placeholder data files: evolution/meta.json, seasons/index.json
- Fix unused import in cmd/acb-index-builder/s3_test.go

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

web/public/data/evolution/meta.json

@@ -0,0 +1,7 @@
+{
+  "$comment": "Placeholder file - replaced by index builder",
+  "generation": 0,
+  "promoted_today": 0,
+  "top_10_count": 0,
+  "updated_at": null
+}

web/public/data/seasons/index.json

@@ -0,0 +1,6 @@
+{
+  "$comment": "Placeholder file - replaced by index builder",
+  "updated_at": null,
+  "active_season": null,
+  "seasons": []
+}