feat: add active domains serialization and UI integration

- Implemented `serialize_active_domains` function to gather and format active hidden domains from the game world.
- Updated `game_loop` to include active domains in the broadcast state.
- Enhanced `StatusBar` component to display active domains with a new `StatusWidget`, including dynamic labels and colors based on the number of active domains.
- Added localization support for hidden domain messages in both English and Chinese.
- Updated the world store to manage active domains state and synchronize with the backend.

web/src/locales/en-US.json

@@ -230,7 +230,15 @@
       "change_success": "Phenomenon changed to: {name}",
       "click_to_change": "(Click to change phenomenon)",
       "author_bilibili": "Bilibili",
-      "author_github": "Github"
+      "author_github": "Github",
+      "hidden_domain": {
+        "label": "[Hidden Domain]",
+        "label_active": "[Domain Opened: {count}]",
+        "title": "Opened Hidden Domains",
+        "empty": "No hidden domains currently open",
+        "danger": "Danger",
+        "drop": "Fortune"
+      }
     },
     "controls": {
       "resume": "Resume Game",

web/src/locales/zh-CN.json

@@ -230,7 +230,15 @@
       "change_success": "天象已更易为：{name}",
       "click_to_change": "（点击可更易天象）",
       "author_bilibili": "B站空间",
-      "author_github": "Github仓库"
+      "author_github": "Github仓库",
+      "hidden_domain": {
+        "label": "[秘境]",
+        "label_active": "[秘境开启: {count}]",
+        "title": "当前开启秘境",
+        "empty": "当前暂无秘境开启",
+        "danger": "凶险",
+        "drop": "机缘"
+      }
     },
     "controls": {
       "resume": "继续游戏",