feat(ui): overhaul landing page with new design and search functionality

This commit completely rewrites the main landing page (index.html) to introduce a modern, data-driven design and new features.

The previous implementation had hardcoded data and styles directly within the HTML file. This refactor separates concerns and improves maintainability.

Key changes:
- Complete visual redesign with a modern "glassmorphism" aesthetic and a new color palette.
- Externalized all service and link data into a new `siteConfig.json` file, which is now fetched asynchronously.
- Added a search bar to dynamically filter the list of services.
- Implemented a keyboard shortcut ('/') to focus the search input.
- Rewrote the JavaScript logic for rendering content, making it more modular and easier to manage.

siteConfig.json

@@ -0,0 +1,90 @@
+{
+    "services": [
+        {
+            "name": "git.tootaio.com",
+            "url": "https://git.tootaio.com",
+            "description_en": "Self-hosted Gitea open source community platform.",
+            "description_zh": "自托管的 Gitea 开源社区平台。"
+        },
+        {
+            "name": "nas.tootaio.com",
+            "url": "https://nas.tootaio.com",
+            "description_en": "Cloud storage solution for your files and data.",
+            "description_zh": "为您的文件和数据提供的云存储解决方案。"
+        },
+        {
+            "name": "torrent.tootaio.com",
+            "url": "https://torrent.tootaio.com",
+            "description_en": "Download torrent files to our server with high speed.",
+            "description_zh": "借助服务器高速下载 Torrent 文件。"
+        },
+        {
+            "name": "wiki.tootaio.com",
+            "url": "https://wiki.tootaio.com",
+            "description_en": "Wiki for our studio's games and project planning.",
+            "description_zh": "我们工作室游戏和项目策划的维基百科。"
+        },
+        {
+            "name": "kenney-assets.tootaio.com",
+            "url": "https://kenney-assets.tootaio.com",
+            "description_en": "Unofficial mirror for Kenney's game assets.",
+            "description_zh": "Kenney 游戏资源的非官方镜像站。"
+        },
+        {
+            "name": "itch-gd-dl.tootaio.com",
+            "url": "https://itch-gd-dl.tootaio.com",
+            "description_en": "Itch.io Godot game crawler and downloader.",
+            "description_zh": "Itch.io Godot 游戏爬取和下载工具。"
+        },
+        {
+            "name": "pdf.tootaio.com",
+            "url": "https://pdf.tootaio.com",
+            "description_en": "Online PDF tools for all your document needs.",
+            "description_zh": "满足您所有文档需求的在线 PDF 工具。"
+        },
+        {
+            "name": "life-restart.tootaio.com",
+            "url": "https://life-restart.tootaio.com",
+            "description_en": "Mirror site for the Life Restart Simulator game.",
+            "description_zh": "人生重开模拟器游戏的镜像站。"
+        },
+        {
+            "name": "memos.tootaio.com",
+            "url": "https://memos.tootaio.com",
+            "description_en": "Note-taking space for your ideas and thoughts.",
+            "description_zh": "记录您的想法和思考的笔记空间。"
+        },
+        {
+            "name": "json.tootaio.com",
+            "url": "https://json.tootaio.com",
+            "description_en": "JSON Hero viewer for visualizing and editing JSON data.",
+            "description_zh": "用于可视化和编辑 JSON 数据的 JSON Hero 查看器。"
+        }
+    ],
+    "otherLinks": [
+        {
+            "name_en": "Kingsmai's Personal Blog",
+            "name_zh": "Kingsmai 的个人博客",
+            "url": "https://kingsmai.github.io",
+            "icon": "blog"
+        },
+        {
+            "name_en": "Kingsmai's GitHub",
+            "name_zh": "Kingsmai 的 GitHub",
+            "url": "https://github.com/kingsmai",
+            "icon": "github"
+        },
+        {
+            "name_en": "Studio Discord Community",
+            "name_zh": "工作室 Discord 社区",
+            "url": "https://discord.com/invite/sJcv7ZM",
+            "icon": "discord"
+        },
+        {
+            "name_en": "Studio BiliBili Space",
+            "name_zh": "工作室 BiliBili 空间",
+            "url": "https://space.bilibili.com/670118055",
+            "icon": "video"
+        }
+    ]
+}