重构：文件系统模块化架构，增强 Markdown 渲染

- 拆分 FileSystem.vue 为模块化组件架构
- 新增 Markdown Mermaid 图表渲染支持
- 新增 180+ 编程语言代码高亮
- 修复编辑/预览模式切换渲染问题
- 优化亮色/暗色模式主题适配
- 新增 TypeScript 类型定义

go.mod

@@ -1,6 +1,6 @@
 module u-desk
 
-go 1.25.4
+go 1.25.6
 
 require (
 	github.com/glebarez/sqlite v1.11.0
@@ -8,7 +8,7 @@ require (
 	github.com/redis/go-redis/v9 v9.17.3
 	github.com/shirou/gopsutil/v3 v3.24.5
 	github.com/wailsapp/wails/v2 v2.11.0
-	go.mongodb.org/mongo-driver v1.17.7
+	go.mongodb.org/mongo-driver/v2 v2.5.0
 	gorm.io/driver/mysql v1.6.0
 	gorm.io/gorm v1.31.1
 )
@@ -22,7 +22,6 @@ require (
 	github.com/glebarez/go-sqlite v1.22.0 // indirect
 	github.com/go-ole/go-ole v1.3.0 // indirect
 	github.com/godbus/dbus/v5 v5.2.2 // indirect
-	github.com/golang/snappy v1.0.0 // indirect
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/gorilla/websocket v1.5.3 // indirect
 	github.com/jchv/go-winloader v0.0.0-20250406163304-c1995be93bd1 // indirect
@@ -38,7 +37,6 @@ require (
 	github.com/lufia/plan9stats v0.0.0-20251013123823-9fd1530e3ec3 // indirect
 	github.com/mattn/go-colorable v0.1.14 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
-	github.com/montanaflynn/stats v0.7.1 // indirect
 	github.com/ncruces/go-strftime v1.0.0 // indirect
 	github.com/pkg/browser v0.0.0-20240102092130-5ac0b6a4141c // indirect
 	github.com/pkg/errors v0.9.1 // indirect