chore: 恢复旧布局基线（迁移改动丢失后重建，apps/packages 布局暂存）

server/internal/db/mssql.go

@@ -0,0 +1,160 @@
+package db
+
+import (
+	"context"
+	"database/sql"
+	"fmt"
+	"net/url"
+	"strings"
+
+	_ "github.com/microsoft/go-mssqldb"
+)
+
+func openMSSQL(c ConnReq) (*sql.DB, error) {
+	dsn, err := mssqlDSN(c)
+	if err != nil {
+		return nil, err
+	}
+	return sql.Open("sqlserver", dsn)
+}
+
+// mssqlDSN 拼 sqlserver:// DSN;账号密码走 url.UserPassword 编码,
+// 修复含空格 / '+' 等特殊字符密码连接失败的问题(url.QueryEscape 不适用 userinfo)。
+func mssqlDSN(c ConnReq) (string, error) {
+	host := c.Host
+	if host == "" {
+		host = "127.0.0.1"
+	}
+	port := c.Port
+	if port == 0 {
+		port = 1433
+	}
+	user := c.User
+	if user == "" {
+		user = "sa"
+	}
+	dbName := c.Database
+	if dbName == "" {
+		dbName = "master"
+	}
+	mode := EffectiveSSLMode(c)
+	q := url.Values{}
+	q.Set("database", dbName)
+	q.Set("connection timeout", "5")
+	switch mode {
+	case "disable":
+		q.Set("encrypt", "disable")
+	case "skip-verify":
+		q.Set("encrypt", "true")
+		q.Set("TrustServerCertificate", "true")
+		if ca := strings.TrimSpace(c.SSLCA); ca != "" {
+			q.Set("certificate", ca)
+		}
+	case "require", "verify-ca":
+		q.Set("encrypt", "true")
+		q.Set("TrustServerCertificate", "false")
+		ca := strings.TrimSpace(c.SSLCA)
+		if mode == "verify-ca" && ca == "" {
+			return "", fmt.Errorf("verify-ca 模式需要填写 CA 证书路径")
+		}
+		if ca != "" {
+			// go-mssqldb msdsn certificate= builds RootCAs from PEM/DER
+			q.Set("certificate", ca)
+		}
+		if host != "" {
+			q.Set("hostnameincertificate", host)
+		}
+	default:
+		return "", fmt.Errorf("未知 SSL 模式: %s", mode)
+	}
+	u := &url.URL{
+		Scheme:   "sqlserver",
+		User:     url.UserPassword(user, c.Password),
+		Host:     fmt.Sprintf("%s:%d", host, port),
+		RawQuery: q.Encode(),
+	}
+	return u.String(), nil
+}
+
+func listDatabasesMSSQL(ctx context.Context, db *sql.DB) ([]string, error) {
+	rows, err := db.QueryContext(ctx, `SELECT name FROM sys.databases WHERE name NOT IN ('master','tempdb','model','msdb') ORDER BY name`)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var out []string
+	for rows.Next() {
+		var name string
+		if err := rows.Scan(&name); err != nil {
+			return nil, err
+		}
+		out = append(out, name)
+	}
+	return out, rows.Err()
+}
+
+func listTablesMSSQL(ctx context.Context, db *sql.DB, database string) ([]string, error) {
+	_ = database
+	rows, err := db.QueryContext(ctx, `
+		SELECT TABLE_SCHEMA + '.' + TABLE_NAME
+		FROM INFORMATION_SCHEMA.TABLES
+		WHERE TABLE_TYPE = 'BASE TABLE'
+		ORDER BY 1`)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var out []string
+	for rows.Next() {
+		var name string
+		if err := rows.Scan(&name); err != nil {
+			return nil, err
+		}
+		out = append(out, name)
+	}
+	return out, rows.Err()
+}
+
+func listColumnsMSSQL(ctx context.Context, dbh *sql.DB, _, table string) ([]ColumnInfo, error) {
+	schema, t := splitSchemaTable(table)
+	if schema == "" {
+		schema = "dbo"
+	}
+	// 关联 sys.indexes / sys.index_columns 补主键标记(命中则 Key='PRI')
+	rows, err := dbh.QueryContext(ctx, `
+		SELECT c.COLUMN_NAME, c.DATA_TYPE,
+			ISNULL(CAST(c.CHARACTER_MAXIMUM_LENGTH AS varchar), ''),
+			c.IS_NULLABLE, c.COLUMN_DEFAULT,
+			CASE WHEN pk.name IS NOT NULL THEN 'PRI' ELSE '' END
+		FROM INFORMATION_SCHEMA.COLUMNS c
+		LEFT JOIN sys.tables t ON t.name = c.TABLE_NAME AND SCHEMA_NAME(t.schema_id) = c.TABLE_SCHEMA
+		LEFT JOIN sys.indexes i ON i.object_id = t.object_id AND i.is_primary_key = 1
+		LEFT JOIN sys.index_columns ic ON ic.object_id = i.object_id AND ic.index_id = i.index_id
+		LEFT JOIN sys.columns pk ON pk.object_id = ic.object_id AND pk.column_id = ic.column_id AND pk.name = c.COLUMN_NAME
+		WHERE c.TABLE_SCHEMA = @p1 AND c.TABLE_NAME = @p2
+		ORDER BY c.ORDINAL_POSITION`, schema, t)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var out []ColumnInfo
+	for rows.Next() {
+		var name, typ, extra, nullable, key string
+		var def sql.NullString
+		if err := rows.Scan(&name, &typ, &extra, &nullable, &def, &key); err != nil {
+			return nil, err
+		}
+		if extra != "" && extra != "-1" {
+			typ = typ + "(" + extra + ")"
+		}
+		col := ColumnInfo{Name: name, Type: typ, Nullable: nullable == "YES", Key: key}
+		if def.Valid {
+			col.Default = def.String
+		}
+		out = append(out, col)
+	}
+	if out == nil {
+		out = []ColumnInfo{}
+	}
+	return out, rows.Err()
+}