三端自适应布局与 PWA 可安装支持

新增响应式样式、手机侧滑导航、manifest 与 Service Worker；补充根路径重定向与安装 App 入口。

Co-authored-by: Cursor <cursoragent@cursor.com>

static/manifest.json

@@ -0,0 +1,33 @@
+{
+  "name": "国内期货交易监控复盘系统",
+  "short_name": "期货监控",
+  "description": "期货交易监控、持仓管理、复盘与统计分析",
+  "start_url": "/",
+  "scope": "/",
+  "display": "standalone",
+  "orientation": "any",
+  "background_color": "#050508",
+  "theme_color": "#050508",
+  "lang": "zh-CN",
+  "categories": ["finance", "productivity"],
+  "icons": [
+    {
+      "src": "/static/icons/icon-192.png",
+      "sizes": "192x192",
+      "type": "image/png",
+      "purpose": "any"
+    },
+    {
+      "src": "/static/icons/icon-512.png",
+      "sizes": "512x512",
+      "type": "image/png",
+      "purpose": "any"
+    },
+    {
+      "src": "/static/icons/icon-512.png",
+      "sizes": "512x512",
+      "type": "image/png",
+      "purpose": "maskable"
+    }
+  ]
+}