feat: 更新公告、设施和城镇数据，移除过时信息

public/data/towns.json

@@ -1,54 +1,3 @@
 [
-    {
-        "title": "兔子洞",
-        "logo": "https://img.lunadeer.cn/i/2026/03/16/69b8279ce344f.png",
-        "gradient": {
-            "from": "#95ea66",
-            "to": "#4aa18b"
-        },
-        "dimension": "overworld",
-        "coordinatesSecret": true,
-        "scale": "small",
-        "townType": "building",
-        "recruitment": "closed",
-        "founders": [
-            "Thumper0327",
-            "Flower0632"
-        ],
-        "members": [],
-        "introduction": []
-    },
-    {
-        "title": "海沫",
-        "logo": "https://s41.ax1x.com/2026/03/18/peeMXvj.jpg",
-        "gradient": {
-            "from": "#00ffff",
-            "to": "#0000ff"
-        },
-        "dimension": "overworld",
-        "coordinatesSecret": false,
-        "scale": "medium",
-        "townType": "building",
-        "recruitment": "welcome",
-        "founders": [
-            "Aquaium"
-        ],
-        "members": [
-            "jiajia_zZ",
-            "hamburbox34",
-            "AnnatarxMelkor",
-            "Chunky_Wu"
-        ],
-        "introduction": [
-            {
-                "type": "text",
-                "content": "无垠的草原，广袤的天空……这是Aquaium(edge)建立海沫的初衷。edge希望玩家可以自由发挥，并且全心投入喜欢的领域中，而不是为了原材料奔波。为此edge和jiajia_zZ在基地建造了一系列基础设施，并且仍不断升级中。我们欢迎每一个富有激情的创作者。"
-            }
-        ],
-        "coordinates": {
-            "x": 10000,
-            "y": 64,
-            "z": 10000
-        }
-    }
+
 ]