chore(deps): upgrade react to 19.2.7 and react types to 19.x (#1154)

Bump react and react-dom 19.1.2 -> 19.2.7 and @types/react and
@types/react-dom from v18 to v19. Keeps babel-plugin-react-compiler,
which is a separate build-time tool, not part of the React 19 runtime.

The @types v19 upgrade surfaced 21 type-only errors, all fixed without
runtime behavior changes:

- useRef<T>() now requires an explicit argument: pass undefined
- DOM element refs are RefObject<T | null>: widen PostFormFields and
  AdvancedSettings ref prop types accordingly
- retype reply-modal onInput handler to FormEvent + currentTarget
- add a null guard for the boards-bar search input
- update test mocks for stricter cloneElement/forwardRef typings

Verified: type-check, lint, 1051 tests, and build pass; react-doctor
score unchanged at 54; browser smoke across Chromium/Firefox/WebKit
plus mobile viewport clean.

src/components/boards-bar/boards-bar.tsx

@@ -60,7 +60,7 @@ const SearchBar = ({ setShowSearchBar }: { setShowSearchBar: (show: boolean) =>
   const handleSearchSubmit = (event: React.FormEvent<HTMLFormElement>) => {
     event.preventDefault();
     const searchInput = searchInputRef.current?.value;
-    if (searchInput) {
+    if (searchInput && searchInputRef.current) {
       searchInputRef.current.value = '';
       navigate(`/${searchInput}`);
       setShowSearchBar(false);

src/components/comment-content/__tests__/comment-content.test.tsx

@@ -52,7 +52,15 @@ const testState = vi.hoisted(() => ({
 }));
 
 vi.mock('react-i18next', () => ({
-  Trans: ({ components, i18nKey, values }: { components?: Record<number, React.ReactElement>; i18nKey: string; values?: Record<string, unknown> }) =>
+  Trans: ({
+    components,
+    i18nKey,
+    values,
+  }: {
+    components?: Record<number, React.ReactElement<Record<string, unknown>>>;
+    i18nKey: string;
+    values?: Record<string, unknown>;
+  }) =>
     createElement(
       'span',
       { 'data-testid': `trans-${i18nKey}` },

src/components/edit-menu/__tests__/edit-menu.test.tsx

@@ -34,7 +34,7 @@ const testState = vi.hoisted(() => ({
 }));
 
 vi.mock('react-i18next', () => ({
-  Trans: ({ components, i18nKey }: { components?: Record<number, React.ReactElement>; i18nKey: string }) =>
+  Trans: ({ components, i18nKey }: { components?: Record<number, React.ReactElement<Record<string, unknown>>>; i18nKey: string }) =>
     createElement(
       'span',
       { 'data-testid': `trans-${i18nKey}` },

src/components/post-form/post-form.tsx

@@ -156,10 +156,10 @@ interface PostFormFieldsProps {
   isBbcodePreviewing: boolean;
   postCid: string;
   subjectRef: React.Ref<HTMLInputElement>;
-  optionsRef: React.RefObject<HTMLInputElement>;
-  flagRef: React.RefObject<HTMLSelectElement>;
-  flashTagRef: React.RefObject<HTMLSelectElement>;
-  textRef: React.RefObject<HTMLTextAreaElement>;
+  optionsRef: React.RefObject<HTMLInputElement | null>;
+  flagRef: React.RefObject<HTMLSelectElement | null>;
+  flashTagRef: React.RefObject<HTMLSelectElement | null>;
+  textRef: React.RefObject<HTMLTextAreaElement | null>;
   urlRef: React.Ref<HTMLInputElement>;
   url: string;
   lengthError: string | null;

src/components/reply-modal/reply-modal.tsx

@@ -358,9 +358,9 @@ const ReplyModal = ({ closeModal, showReplyModal, parentCid, parentNumber, threa
     }
   }, [showReplyModal]);
 
-  const handleContentInput = (e: React.ChangeEvent<HTMLTextAreaElement>) => {
-    lastSelectionStartRef.current = e.target.selectionStart ?? e.target.value.length;
-    lastSelectionEndRef.current = e.target.selectionEnd ?? lastSelectionStartRef.current;
+  const handleContentInput = (e: React.FormEvent<HTMLTextAreaElement>) => {
+    lastSelectionStartRef.current = e.currentTarget.selectionStart ?? e.currentTarget.value.length;
+    lastSelectionEndRef.current = e.currentTarget.selectionEnd ?? lastSelectionStartRef.current;
   };
 
   const handleContentValueChange = (content: string, selectionStart?: number, selectionEnd?: number, options = optionsRef.current?.value || '') => {

src/components/reply-quote-preview/__tests__/reply-quote-preview.test.tsx

@@ -38,19 +38,8 @@ vi.mock('react-router-dom', async () => {
   const ReactModule = await vi.importActual<typeof import('react')>('react');
 
   return {
-    Link: ReactModule.forwardRef(
-      (
-        {
-          children,
-          to,
-          ...props
-        }: {
-          children?: React.ReactNode;
-          to: string;
-          [key: string]: unknown;
-        },
-        ref,
-      ) => ReactModule.createElement('a', { ...props, href: to, ref }, children),
+    Link: ReactModule.forwardRef<HTMLAnchorElement, { children?: React.ReactNode; to: string }>(({ children, to, ...props }, ref) =>
+      ReactModule.createElement('a', { ...props, href: to, ref }, children),
     ),
     useLocation: () => ({
       pathname: testState.locationPath,

src/components/settings-modal/advanced-settings/advanced-settings.tsx

@@ -6,16 +6,16 @@ import { canConfigureBrowserPureP2P, isBrowserPureP2PEnabled } from '../../../li
 import styles from './advanced-settings.module.css';
 
 interface SettingsProps {
-  ipfsGatewayUrlsRef?: RefObject<HTMLTextAreaElement>;
-  mediaIpfsGatewayUrlRef?: RefObject<HTMLInputElement>;
-  pubsubProvidersRef?: RefObject<HTMLTextAreaElement>;
-  httpRoutersRef?: RefObject<HTMLTextAreaElement>;
-  ethRpcRef?: RefObject<HTMLTextAreaElement>;
-  p2pRpcRef?: RefObject<HTMLInputElement>;
-  p2pDataPathRef?: RefObject<HTMLInputElement>;
+  ipfsGatewayUrlsRef?: RefObject<HTMLTextAreaElement | null>;
+  mediaIpfsGatewayUrlRef?: RefObject<HTMLInputElement | null>;
+  pubsubProvidersRef?: RefObject<HTMLTextAreaElement | null>;
+  httpRoutersRef?: RefObject<HTMLTextAreaElement | null>;
+  ethRpcRef?: RefObject<HTMLTextAreaElement | null>;
+  p2pRpcRef?: RefObject<HTMLInputElement | null>;
+  p2pDataPathRef?: RefObject<HTMLInputElement | null>;
   onPureP2PBrowserChange?: (enabled: boolean) => void;
   pureP2PBrowserEnabled?: boolean;
-  pureP2PBrowserRef?: RefObject<HTMLInputElement>;
+  pureP2PBrowserRef?: RefObject<HTMLInputElement | null>;
 }
 
 type AccountProtocolOptions = {