refactor(frontend): move form-item hints from extra to tooltip

Switch reality target, node options, and WARP auto-update-IP hints from
inline extra text to label tooltips for a cleaner form layout.

internal/database/migrate_data.go

@@ -223,7 +223,7 @@ func copyTable(src, dst *gorm.DB, mdl any) (int, error) {
 		}
 
 		rows := make([]map[string]any, n)
-		for i := 0; i < n; i++ {
+		for i := range n {
 			rv := reflect.Indirect(slice.Index(i))
 			row := make(map[string]any, len(columns))
 			for _, name := range columns {