[Logs] Amend lazy imports in logs_shared plugin (#164102)

## Summary

As part of #161151 a [selection of
component imports were made
lazy](https://github.com/elastic/kibana/blob/main/x-pack/plugins/logs_shared/public/index.ts#L52)
and wrapped with a [`dynamic` wrapper
component](https://github.com/elastic/kibana/blob/main/x-pack/plugins/logs_shared/common/dynamic.tsx#L22).
Unfortunately some of these imports did not adhere to the rules of
React's `lazy` imports (needing a `default` export, no named imports
etc), and the `dynamic` wrapper seems to have suppressed error
information that would have been available via using `lazy` directly.

Only the anomaly and categories log entry examples (in the expanded
rows) were affected by this, as the stream and embeddable import from
locations that were backed by a `default` export (and those top level
components don't import from that particular index file lower in the
hierarchy). For imports that weren't backed by a `default` I've added
them, and where necessary moved components to new files if needed (since
it's one `default` per file).

Also open to suggestions of ways we can alter the `<dynamic />`
component and maintain the error safety 🤔

## Examples

Without these changes:

![Screenshot 2023-08-16 at 17 35
50](https://github.com/elastic/kibana/assets/471693/78aa0300-109e-40b5-b64f-6574a547cbf3)

Warning using `lazy` directly without the `dynamic` wrapper:

![Screenshot 2023-08-16 at 17 36
27](https://github.com/elastic/kibana/assets/471693/a71e3c72-cf3a-4846-9ee9-df70c1729b03)

## Testing

- Check all instances render correctly (stream, embeddable uses, and ML
page log entry examples).

x-pack/plugins/logs_shared/common/dynamic.tsx

@@ -7,7 +7,9 @@
 
 import React, { lazy, Suspense } from 'react';
 
-type LoadableComponent = () => any;
+type LoadableComponent = () => Promise<{
+  default: React.ComponentType<any>;
+}>;
 
 interface DynamicOptions {
   fallback?: React.ReactNode;

x-pack/plugins/logs_shared/public/components/logging/log_text_stream/column_headers.tsx

@@ -7,7 +7,6 @@
 
 import { i18n } from '@kbn/i18n';
 import React from 'react';
-import { transparentize } from 'polished';
 
 import { euiStyled } from '@kbn/kibana-react-plugin/common';
 import {
@@ -16,7 +15,6 @@ import {
   LogEntryColumnWidth,
   LogEntryColumnWidths,
 } from './log_entry_column';
-import { ASSUMED_SCROLLBAR_WIDTH } from './vertical_scroll_panel';
 import { useLogPositionStateContext } from '../../../containers/logs/log_position';
 import { localizedDate } from '../../../../common/formatters/datetime';
 import {
@@ -25,6 +23,7 @@ import {
   isMessageColumnRenderConfiguration,
   isFieldColumnRenderConfiguration,
 } from '../../../utils/log_column_render_configuration';
+import LogColumnHeadersWrapper from './column_headers_wrapper';
 
 export const LogColumnHeaders: React.FunctionComponent<{
   columnConfigurations: LogColumnRenderConfiguration[];
@@ -112,22 +111,6 @@ export const LogColumnHeader: React.FunctionComponent<{
   </LogColumnHeaderWrapper>
 );
 
-export const LogColumnHeadersWrapper = euiStyled.div.attrs((props) => ({
-  role: props.role ?? 'row',
-}))`
-  align-items: stretch;
-  display: flex;
-  flex-direction: row;
-  flex-wrap: nowrap;
-  justify-content: flex-start;
-  overflow: hidden;
-  padding-right: ${ASSUMED_SCROLLBAR_WIDTH}px;
-  border-bottom: ${(props) => props.theme.eui.euiBorderThin};
-  box-shadow: 0 2px 2px -1px ${(props) => transparentize(0.3, props.theme.eui.euiColorLightShade)};
-  position: relative;
-  z-index: 1;
-`;
-
 const LogColumnHeaderWrapper = euiStyled(LogEntryColumn).attrs((props) => ({
   role: props.role ?? 'columnheader',
 }))`
@@ -146,3 +129,6 @@ const LogColumnHeaderContent = euiStyled(LogEntryColumnContent)`
   text-overflow: clip;
   white-space: pre;
 `;
+
+// eslint-disable-next-line import/no-default-export
+export default LogColumnHeader;

x-pack/plugins/logs_shared/public/components/logging/log_text_stream/column_headers_wrapper.tsx

@@ -0,0 +1,30 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+import { euiStyled } from '@kbn/kibana-react-plugin/common';
+import { transparentize } from 'polished';
+import { ASSUMED_SCROLLBAR_WIDTH } from './vertical_scroll_panel';
+
+export const LogColumnHeadersWrapper = euiStyled.div.attrs((props) => ({
+  role: props.role ?? 'row',
+}))`
+    align-items: stretch;
+    display: flex;
+    flex-direction: row;
+    flex-wrap: nowrap;
+    justify-content: flex-start;
+    overflow: hidden;
+    padding-right: ${ASSUMED_SCROLLBAR_WIDTH}px;
+    border-bottom: ${(props) => props.theme.eui.euiBorderThin};
+    box-shadow: 0 2px 2px -1px ${(props) =>
+      transparentize(0.3, props.theme.eui.euiColorLightShade)};
+    position: relative;
+    z-index: 1;
+  `;
+
+// eslint-disable-next-line import/no-default-export
+export default LogColumnHeadersWrapper;

x-pack/plugins/logs_shared/public/components/logging/log_text_stream/index.ts

@@ -8,11 +8,12 @@
 export type { LogEntryStreamItem } from './item';
 export type { LogEntryColumnWidths } from './log_entry_column';
 
-export { LogColumnHeader, LogColumnHeadersWrapper } from './column_headers';
+export { LogColumnHeader } from './column_headers';
+export { LogColumnHeadersWrapper } from './column_headers_wrapper';
 export { iconColumnId, LogEntryColumn, useColumnWidths } from './log_entry_column';
 export { LogEntryContextMenu } from './log_entry_context_menu';
 export { LogEntryFieldColumn } from './log_entry_field_column';
 export { LogEntryMessageColumn } from './log_entry_message_column';
-export { LogEntryRowWrapper } from './log_entry_row';
+export { LogEntryRowWrapper } from './log_entry_row_wrapper';
 export { LogEntryTimestampColumn } from './log_entry_timestamp_column';
 export { ScrollableLogTextStreamView } from './scrollable_log_text_stream_view';

x-pack/plugins/logs_shared/public/components/logging/log_text_stream/log_entry_column.tsx

@@ -156,3 +156,6 @@ export const useColumnWidths = ({
     [columnWidths, CharacterDimensionsProbe]
   );
 };
+
+// eslint-disable-next-line import/no-default-export
+export default LogEntryColumn;

x-pack/plugins/logs_shared/public/components/logging/log_text_stream/log_entry_context_menu.tsx

@@ -120,3 +120,6 @@ const AbsoluteWrapper = euiStyled.div`
 const ButtonWrapper = euiStyled.div`
   transform: translate(-6px, -6px);
 `;
+
+// eslint-disable-next-line import/no-default-export
+export default LogEntryContextMenu;

x-pack/plugins/logs_shared/public/components/logging/log_text_stream/log_entry_field_column.tsx

@@ -64,3 +64,6 @@ const FieldColumnContent = euiStyled(LogEntryColumnContent)<LogEntryColumnConten
       ? preWrappedContentStyle
       : unwrappedContentStyle};
 `;
+
+// eslint-disable-next-line import/no-default-export
+export default LogEntryFieldColumn;

x-pack/plugins/logs_shared/public/components/logging/log_text_stream/log_entry_message_column.tsx

@@ -114,3 +114,6 @@ const renderMessageSegments = (messageSegments: LogMessagePart[]): string => {
     })
     .join(' ');
 };
+
+// eslint-disable-next-line import/no-default-export
+export default LogEntryMessageColumn;

x-pack/plugins/logs_shared/public/components/logging/log_text_stream/log_entry_row.tsx

@@ -6,7 +6,6 @@
  */
 
 import { i18n } from '@kbn/i18n';
-import { euiStyled } from '@kbn/kibana-react-plugin/common';
 import { ObservabilityTriggerId } from '@kbn/observability-shared-plugin/common';
 import {
   useUiTracker,
@@ -29,8 +28,8 @@ import { iconColumnId, LogEntryColumn, LogEntryColumnWidths } from './log_entry_
 import { LogEntryContextMenu } from './log_entry_context_menu';
 import { LogEntryFieldColumn } from './log_entry_field_column';
 import { LogEntryMessageColumn } from './log_entry_message_column';
+import { LogEntryRowWrapper } from './log_entry_row_wrapper';
 import { LogEntryTimestampColumn } from './log_entry_timestamp_column';
-import { highlightedContentStyle, hoveredContentStyle, monospaceTextStyle } from './text_styles';
 
 const MENU_LABEL = i18n.translate('xpack.logsShared.logEntryItemView.logEntryActionsMenuToolTip', {
   defaultMessage: 'View actions for line',
@@ -85,7 +84,6 @@ export const LogEntryRow = memo(
 
     const setItemIsHovered = useCallback(() => setIsHovered(true), []);
     const setItemIsNotHovered = useCallback(() => setIsHovered(false), []);
-
     const openFlyout = useCallback(
       () => openFlyoutWithItem?.(logEntry.id),
       [openFlyoutWithItem, logEntry.id]
@@ -263,26 +261,5 @@ export const LogEntryRow = memo(
   }
 );
 
-interface LogEntryRowWrapperProps {
-  scale: TextScale;
-  isHighlighted?: boolean;
-}
-
-export const LogEntryRowWrapper = euiStyled.div.attrs(() => ({
-  role: 'row',
-}))<LogEntryRowWrapperProps>`
-  align-items: stretch;
-  color: ${(props) => props.theme.eui.euiTextColor};
-  display: flex;
-  flex-direction: row;
-  flex-wrap: nowrap;
-  justify-content: flex-start;
-  overflow: hidden;
-
-  ${(props) => monospaceTextStyle(props.scale)};
-  ${(props) => (props.isHighlighted ? highlightedContentStyle : '')}
-
-  &:hover {
-    ${hoveredContentStyle}
-  }
-`;
+// eslint-disable-next-line import/no-default-export
+export default LogEntryRow;

x-pack/plugins/logs_shared/public/components/logging/log_text_stream/log_entry_row_wrapper.tsx

@@ -0,0 +1,37 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+import { euiStyled } from '@kbn/kibana-react-plugin/common';
+import { TextScale } from '../../../../common/log_text_scale';
+import { highlightedContentStyle, hoveredContentStyle, monospaceTextStyle } from './text_styles';
+
+export const LogEntryRowWrapper = euiStyled.div.attrs(() => ({
+  role: 'row',
+}))<LogEntryRowWrapperProps>`
+    align-items: stretch;
+    color: ${(props) => props.theme.eui.euiTextColor};
+    display: flex;
+    flex-direction: row;
+    flex-wrap: nowrap;
+    justify-content: flex-start;
+    overflow: hidden;
+  
+    ${(props) => monospaceTextStyle(props.scale)};
+    ${(props) => (props.isHighlighted ? highlightedContentStyle : '')}
+  
+    &:hover {
+      ${hoveredContentStyle}
+    }
+  `;
+
+interface LogEntryRowWrapperProps {
+  scale: TextScale;
+  isHighlighted?: boolean;
+}
+
+// eslint-disable-next-line import/no-default-export
+export default LogEntryRowWrapper;

x-pack/plugins/logs_shared/public/components/logging/log_text_stream/log_entry_timestamp_column.tsx

@@ -31,3 +31,6 @@ const TimestampColumnContent = euiStyled(LogEntryColumnContent)`
   text-overflow: clip;
   white-space: pre;
 `;
+
+// eslint-disable-next-line import/no-default-export
+export default LogEntryTimestampColumn;

x-pack/plugins/logs_shared/public/components/logging/log_text_stream/scrollable_log_text_stream_view.tsx

@@ -7,7 +7,7 @@
 
 import { i18n } from '@kbn/i18n';
 import { FormattedMessage } from '@kbn/i18n-react';
-import React, { Fragment } from 'react';
+import React, { Fragment, GetDerivedStateFromProps } from 'react';
 import moment from 'moment';
 
 import { euiStyled } from '@kbn/kibana-react-plugin/common';
@@ -73,10 +73,10 @@ export class ScrollableLogTextStreamView extends React.PureComponent<
   ScrollableLogTextStreamViewProps,
   ScrollableLogTextStreamViewState
 > {
-  public static getDerivedStateFromProps(
-    nextProps: ScrollableLogTextStreamViewProps,
-    prevState: ScrollableLogTextStreamViewState
-  ): Partial<ScrollableLogTextStreamViewState> | null {
+  public static getDerivedStateFromProps: GetDerivedStateFromProps<
+    ScrollableLogTextStreamViewProps,
+    ScrollableLogTextStreamViewState
+  > = (nextProps, prevState) => {
     const hasNewTarget = nextProps.target && nextProps.target !== prevState.target;
     const hasItems = nextProps.items.length > 0;
 
@@ -118,7 +118,7 @@ export class ScrollableLogTextStreamView extends React.PureComponent<
     return {
       isScrollLocked: false,
     };
-  }
+  };
 
   constructor(props: ScrollableLogTextStreamViewProps) {
     super(props);

x-pack/plugins/logs_shared/public/index.ts

@@ -53,7 +53,7 @@ export const LogColumnHeader = dynamic(
   () => import('./components/logging/log_text_stream/column_headers')
 );
 export const LogColumnHeadersWrapper = dynamic(
-  () => import('./components/logging/log_text_stream/column_headers')
+  () => import('./components/logging/log_text_stream/column_headers_wrapper')
 );
 export const LogEntryColumn = dynamic(
   () => import('./components/logging/log_text_stream/log_entry_column')
@@ -68,7 +68,7 @@ export const LogEntryMessageColumn = dynamic(
   () => import('./components/logging/log_text_stream/log_entry_message_column')
 );
 export const LogEntryRowWrapper = dynamic(
-  () => import('./components/logging/log_text_stream/log_entry_row')
+  () => import('./components/logging/log_text_stream/log_entry_row_wrapper')
 );
 export const LogEntryTimestampColumn = dynamic(
   () => import('./components/logging/log_text_stream/log_entry_timestamp_column')