重构：移除数据库客户端模块 v0.4.0（-17,885行，专注文件管理）

- 删除全部 MySQL/Redis/MongoDB 客户端代码（dbclient/api/service/storage）
- 清理 4 个驱动依赖（mysql/redis/mongo/gorm-mysql），构建体积 -10MB
- 前端移除 db-cli 整个目录（40 文件）+ 7 个 API/工具文件
- 版本号升级至 v0.4.0，顶部 Tab 仅保留文件管理

go.mod

@@ -6,24 +6,17 @@ require (
 	github.com/chromedp/cdproto v0.0.0-20250724212937-08a3db8b4327
 	github.com/chromedp/chromedp v0.14.2
 	github.com/glebarez/sqlite v1.11.0
-	github.com/go-sql-driver/mysql v1.9.3
-	github.com/redis/go-redis/v9 v9.17.3
 	github.com/shirou/gopsutil/v3 v3.24.5
 	github.com/wailsapp/wails/v2 v2.12.0
 	github.com/yuin/goldmark v1.8.2
-	go.mongodb.org/mongo-driver/v2 v2.5.0
 	golang.org/x/sys v0.40.0
-	gorm.io/driver/mysql v1.6.0
 	gorm.io/gorm v1.31.1
 )
 
 require (
-	filippo.io/edwards25519 v1.1.0 // indirect
 	git.sr.ht/~jackmordaunt/go-toast/v2 v2.0.3 // indirect
 	github.com/bep/debounce v1.2.1 // indirect
-	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/chromedp/sysutil v1.1.0 // indirect
-	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
 	github.com/glebarez/go-sqlite v1.22.0 // indirect
 	github.com/go-json-experiment/json v0.0.0-20250725192818-e39067aee2d2 // indirect
@@ -37,7 +30,6 @@ require (
 	github.com/jchv/go-winloader v0.0.0-20250406163304-c1995be93bd1 // indirect
 	github.com/jinzhu/inflection v1.0.0 // indirect
 	github.com/jinzhu/now v1.1.5 // indirect
-	github.com/klauspost/compress v1.18.3 // indirect
 	github.com/labstack/echo/v4 v4.15.0 // indirect
 	github.com/labstack/gommon v0.4.2 // indirect
 	github.com/leaanthony/go-ansi-parser v1.6.1 // indirect
@@ -62,15 +54,10 @@ require (
 	github.com/valyala/fasttemplate v1.2.2 // indirect
 	github.com/wailsapp/go-webview2 v1.0.23 // indirect
 	github.com/wailsapp/mimetype v1.4.1 // indirect
-	github.com/xdg-go/pbkdf2 v1.0.0 // indirect
-	github.com/xdg-go/scram v1.2.0 // indirect
-	github.com/xdg-go/stringprep v1.0.4 // indirect
-	github.com/youmark/pkcs8 v0.0.0-20240726163527-a2c0da244d78 // indirect
 	github.com/yusufpapurcu/wmi v1.2.4 // indirect
 	golang.org/x/crypto v0.47.0 // indirect
 	golang.org/x/exp v0.0.0-20260112195511-716be5621a96 // indirect
 	golang.org/x/net v0.49.0 // indirect
-	golang.org/x/sync v0.19.0 // indirect
 	golang.org/x/text v0.33.0 // indirect
 	modernc.org/libc v1.67.7 // indirect
 	modernc.org/mathutil v1.7.1 // indirect