feat(file): 优化文件上传处理和ID管理规范

- 新增 buildFileProxyUrl 函数构建永久代理路径，避免富文本图片链接过期
- 重构 uploadFile 函数，统一将后端返回的数值型 ID 转换为字符串
- 在业务富文本编辑器中使用永久代理路径替换临时签名 URL
- 完善 API 适配层 ID 规范，确保所有 ID 字段统一转换为字符串类型
- 移除废弃的编辑器相关路由和组件
- 更新构建代理配置以支持富文本图片直连访问
- 删除冗余的类型定义和依赖包

src/router/elegant/imports.ts

@@ -44,8 +44,6 @@ export const views: Record<LastLevelRouteKey, RouteComponent | (() => Promise<Ro
   plugin_charts_echarts: () => import("@/views/plugin/charts/echarts/index.vue"),
   plugin_charts_vchart: () => import("@/views/plugin/charts/vchart/index.vue"),
   plugin_copy: () => import("@/views/plugin/copy/index.vue"),
-  plugin_editor_markdown: () => import("@/views/plugin/editor/markdown/index.vue"),
-  plugin_editor_quill: () => import("@/views/plugin/editor/quill/index.vue"),
   plugin_excel: () => import("@/views/plugin/excel/index.vue"),
   plugin_gantt_dhtmlx: () => import("@/views/plugin/gantt/dhtmlx/index.vue"),
   plugin_gantt_vtable: () => import("@/views/plugin/gantt/vtable/index.vue"),