清理冗余路由代码，修复首页标题与模板安全

- 简化 http-api/http-tcp/web-toolkit 的 router.py，抽取重复代码
- 修复 ws-api middleware 中间件返回值传递问题
- 修复 web-toolkit template.py 安全漏洞 (eval → AST 验证)
- 将首页标题从 "OSS Runtime" 改为 "Future OSS"
- 更新 README.md 与 static/banner.svg
- 新增 i18n 国际化插件 (骨架)
- 新增 oss/shared/ 共享模块

store/@{FutureOSS}/ws-api/middleware.py

@@ -29,13 +29,16 @@ class WsMiddlewareChain:
     async def run(self, client, message) -> Optional[str]:
         """执行中间件链"""
         idx = 0
+        current_message = message
 
-        async def next_fn():
-            nonlocal idx
+        async def next_fn(msg=None):
+            nonlocal idx, current_message
+            if msg is not None:
+                current_message = msg
             if idx < len(self.middlewares):
                 mw = self.middlewares[idx]
                 idx += 1
-                return await mw.process(client, message, next_fn)
-            return message
+                return await mw.process(client, current_message, next_fn)
+            return current_message
 
         return await next_fn()