feat: 18 引擎驱动全家桶 + 驱动管理/离线包 + 设置中心 + 工作台交互打磨

驱动接入（全部本机真实例验收）：
- Elasticsearch 原生 SQL API、InfluxDB 原生 HTTP+Flux（官方 JDBC 付费许可，实测弃用）
- ZooKeeper/MongoDB JVM agent（连接时自动下载官方驱动 jar，sha256 钉版本到 ~/.opsxdb/drivers/）
- 达梦 JDBC agent 桥就绪（待厂商 jar+实例）；TiDB 真实例验收
- 协议族代码审查放行 PolarDB/TDSQL/OceanBase/Kingbase/GaussDB/Oracle
- 驱动能力模型：按驱动开关对象树分组/右键菜单/行编辑，NoSQL 树拍平（对象直挂库节点）

驱动管理：
- 驱动管理弹框（状态/预装/离线包导入/JDK 检测）+ /api/drivers/* 三接口
- opsxdb-driver 驱动商店仓库（清单/fetch.sh/pack.sh 离线包/import.sh）
- 连接时懒加载：DMG 零 Java 产物，首连自动下载（实测 ZK 九件套 1.35s），离线包自动回退

UI/交互：
- 设置中心（⚙）：常规/执行/结果/驱动/快捷键/关于，左导航+右面板（对标 opsxshell）
- 实例级展开箭头（行首 SVG chevron，替代字体回退失真的 Unicode 三角）
- 树内嵌套渲染修复：对象树挂在激活连接下；工具栏窄窗口不断行（按钮 nowrap+整颗换行）
- 侧栏连接行精简（图标+连接名）、SQLite SSH 守卫、Oracle 死参数清理

质量：
- Go 协议层/离线回退单测、E2E 门控测试（ES/ZK/Influx/Mongo/TiDB/JDBC 桥）
- 驱动注册表单一事实来源 connection-types.json，README/BACKLOG/AGENTS 同步

apps/server/internal/db/oracle.go

@@ -1,6 +1,7 @@
 package db
 
 import (
+	"context"
 	"database/sql"
 	"fmt"
 	"net/url"
@@ -58,9 +59,9 @@ func openOracle(c ConnReq) (*sql.DB, error) {
 	return sql.Open("oracle", dsn)
 }
 
-func listDatabasesOracle(db *sql.DB) ([]string, error) {
+func listDatabasesOracle(ctx context.Context, db *sql.DB) ([]string, error) {
 	// 返回当前用户可见 schema
-	rows, err := db.Query(`SELECT username FROM all_users ORDER BY username`)
+	rows, err := db.QueryContext(ctx, `SELECT username FROM all_users ORDER BY username`)
 	if err != nil {
 		return nil, err
 	}
@@ -76,15 +77,15 @@ func listDatabasesOracle(db *sql.DB) ([]string, error) {
 	return out, rows.Err()
 }
 
-func listTablesOracle(db *sql.DB, schema string) ([]string, error) {
+func listTablesOracle(ctx context.Context, db *sql.DB, schema string) ([]string, error) {
 	var (
 		rows *sql.Rows
 		err  error
 	)
 	if schema == "" {
-		rows, err = db.Query(`SELECT table_name FROM user_tables ORDER BY table_name`)
+		rows, err = db.QueryContext(ctx, `SELECT table_name FROM user_tables ORDER BY table_name`)
 	} else {
-		rows, err = db.Query(`SELECT table_name FROM all_tables WHERE owner = UPPER(:1) ORDER BY table_name`, schema)
+		rows, err = db.QueryContext(ctx, `SELECT table_name FROM all_tables WHERE owner = UPPER(:1) ORDER BY table_name`, schema)
 	}
 	if err != nil {
 		return nil, err
@@ -101,7 +102,7 @@ func listTablesOracle(db *sql.DB, schema string) ([]string, error) {
 	return out, rows.Err()
 }
 
-func listColumnsOracle(dbh *sql.DB, schema, table string) ([]ColumnInfo, error) {
+func listColumnsOracle(ctx context.Context, dbh *sql.DB, schema, table string) ([]ColumnInfo, error) {
 	owner, t := splitSchemaTable(table)
 	if owner == "" {
 		owner = schema
@@ -110,16 +111,27 @@ func listColumnsOracle(dbh *sql.DB, schema, table string) ([]ColumnInfo, error)
 		rows *sql.Rows
 		err  error
 	)
+	// 关联约束元数据补主键标记(命中则 Key='PRI');沿用既有 UPPER() 绑定约定
 	if owner == "" {
-		rows, err = dbh.Query(`
-			SELECT column_name, data_type, nullable, data_default
-			FROM user_tab_columns WHERE table_name = UPPER(:1)
-			ORDER BY column_id`, t)
+		rows, err = dbh.QueryContext(ctx, `
+			SELECT c.column_name, c.data_type, c.nullable, c.data_default,
+				CASE WHEN acc.column_name IS NOT NULL THEN 'PRI' ELSE '' END
+			FROM user_tab_columns c
+			LEFT JOIN user_constraints ac ON ac.table_name = UPPER(:1) AND ac.constraint_type = 'P'
+			LEFT JOIN user_cons_columns acc ON acc.constraint_name = ac.constraint_name
+				AND acc.table_name = ac.table_name AND acc.column_name = c.column_name
+			WHERE c.table_name = UPPER(:2)
+			ORDER BY c.column_id`, t, t)
 	} else {
-		rows, err = dbh.Query(`
-			SELECT column_name, data_type, nullable, data_default
-			FROM all_tab_columns WHERE owner = UPPER(:1) AND table_name = UPPER(:2)
-			ORDER BY column_id`, owner, t)
+		rows, err = dbh.QueryContext(ctx, `
+			SELECT c.column_name, c.data_type, c.nullable, c.data_default,
+				CASE WHEN acc.column_name IS NOT NULL THEN 'PRI' ELSE '' END
+			FROM all_tab_columns c
+			LEFT JOIN all_constraints ac ON ac.owner = UPPER(:1) AND ac.table_name = UPPER(:2) AND ac.constraint_type = 'P'
+			LEFT JOIN all_cons_columns acc ON acc.owner = ac.owner AND acc.constraint_name = ac.constraint_name
+				AND acc.column_name = c.column_name
+			WHERE c.owner = UPPER(:3) AND c.table_name = UPPER(:4)
+			ORDER BY c.column_id`, owner, t, owner, t)
 	}
 	if err != nil {
 		return nil, err
@@ -127,12 +139,12 @@ func listColumnsOracle(dbh *sql.DB, schema, table string) ([]ColumnInfo, error)
 	defer rows.Close()
 	var out []ColumnInfo
 	for rows.Next() {
-		var name, typ, nullable string
+		var name, typ, nullable, key string
 		var def sql.NullString
-		if err := rows.Scan(&name, &typ, &nullable, &def); err != nil {
+		if err := rows.Scan(&name, &typ, &nullable, &def, &key); err != nil {
 			return nil, err
 		}
-		col := ColumnInfo{Name: name, Type: typ, Nullable: nullable == "Y"}
+		col := ColumnInfo{Name: name, Type: typ, Nullable: nullable == "Y", Key: key}
 		if def.Valid {
 			col.Default = def.String
 		}