chore(lint): retire 19 explicit anys, ratchet to 49 warnings (#210)

Event handlers typed as React.MouseEvent, join errors as Error, the
service-worker session setter as strings, the UIA policy map and the
webkitAudioContext probe as narrow shapes. No behaviour change.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PPmy3tPq869XDW4njjVaKA

package.json

@@ -12,7 +12,7 @@
     "build": "vite build",
     "preview": "vite preview",
     "lint": "npm run check:eslint && npm run check:prettier",
-    "check:eslint": "eslint src/* --max-warnings 68",
+    "check:eslint": "eslint src/* --max-warnings 49",
     "check:prettier": "prettier --check .",
     "fix:prettier": "prettier --write .",
     "typecheck": "tsc --noEmit",

src/app/components/ImageOverlay.tsx

@@ -30,7 +30,7 @@ export const ImageOverlay = as<'div', ImageOverlayProps>(
           <Modal
             className={ModalWide}
             size="500"
-            onContextMenu={(evt: any) => evt.stopPropagation()}
+            onContextMenu={(evt: React.MouseEvent) => evt.stopPropagation()}
           >
             {renderViewer({
               src,

src/app/components/message/content/FileContent.tsx

@@ -114,7 +114,7 @@ export function ReadTextFile({ body, mimeType, url, encInfo, renderViewer }: Rea
               <Modal
                 className={ModalWide}
                 size="500"
-                onContextMenu={(evt: any) => evt.stopPropagation()}
+                onContextMenu={(evt: React.MouseEvent) => evt.stopPropagation()}
               >
                 {renderViewer({
                   name: body,
@@ -203,7 +203,7 @@ export function ReadPdfFile({ body, mimeType, url, encInfo, renderViewer }: Read
               <Modal
                 className={ModalWide}
                 size="500"
-                onContextMenu={(evt: any) => evt.stopPropagation()}
+                onContextMenu={(evt: React.MouseEvent) => evt.stopPropagation()}
               >
                 {renderViewer({
                   name: body,

src/app/components/message/content/ImageContent.tsx

@@ -143,7 +143,7 @@ export const ImageContent = as<'div', ImageContentProps>(
                 <Modal
                   className={ModalWide}
                   size="500"
-                  onContextMenu={(evt: any) => evt.stopPropagation()}
+                  onContextMenu={(evt: React.MouseEvent) => evt.stopPropagation()}
                 >
                   {renderViewer({
                     src: srcState.data,

src/app/components/user-profile/UserHero.tsx

@@ -88,7 +88,7 @@ export function UserHero({ userId, avatarUrl, presence }: UserHeroProps) {
                 <Modal
                   size="500"
                   className={ModalMobileFull}
-                  onContextMenu={(evt: any) => evt.stopPropagation()}
+                  onContextMenu={(evt: React.MouseEvent) => evt.stopPropagation()}
                 >
                   <ImageViewer
                     src={viewAvatar}

src/app/features/call/CallMemberCard.tsx

@@ -41,7 +41,7 @@ export function CallMemberCard({ member }: CallMemberCardProps) {
       className={css.CallMemberCard}
       variant="SurfaceVariant"
       radii="500"
-      onClick={(evt: any) =>
+      onClick={(evt: React.MouseEvent) =>
         openUserProfile(
           room.roomId,
           undefined,

src/app/features/room/RoomTombstone.tsx

@@ -36,7 +36,7 @@ export function RoomTombstone({ roomId, body, replacementRoomId }: RoomTombstone
         <Text size="T400">{body || 'This room has been replaced and is no longer active.'}</Text>
         {joinState.status === AsyncStatus.Error && (
           <Text style={{ color: color.Critical.Main }} size="T200">
-            {(joinState.error as any)?.message ?? 'Failed to join replacement room!'}
+            {(joinState.error as Error | undefined)?.message ?? 'Failed to join replacement room!'}
           </Text>
         )}
       </Box>

src/app/features/room/message/Message.tsx

@@ -214,7 +214,7 @@ export const MessageAllReactionItem = as<
   return (
     <>
       <Overlay
-        onContextMenu={(evt: any) => {
+        onContextMenu={(evt: React.MouseEvent) => {
           evt.stopPropagation();
         }}
         open={open}
@@ -1087,7 +1087,7 @@ export const Message = React.memo(
 
       const handleContextMenu: MouseEventHandler<HTMLDivElement> = (evt) => {
         if (evt.altKey || !window.getSelection()?.isCollapsed || edit) return;
-        const tag = (evt.target as any).tagName;
+        const tag = (evt.target as HTMLElement | null)?.tagName;
         if (typeof tag === 'string' && tag.toLowerCase() === 'a') return;
         evt.preventDefault();
         if (coarsePointer) {
@@ -1155,7 +1155,7 @@ export const Message = React.memo(
               after={<Icon size="100" src={Icons.ReplyArrow} />}
               radii="300"
               data-event-id={mEvent.getId()}
-              onClick={(evt: any) => {
+              onClick={(evt: React.MouseEvent<HTMLButtonElement>) => {
                 onReplyClick(evt);
                 closeMenu();
               }}
@@ -1232,7 +1232,7 @@ export const Message = React.memo(
                 after={<Icon src={Icons.ThreadPlus} size="100" />}
                 radii="300"
                 data-event-id={mEvent.getId()}
-                onClick={(evt: any) => {
+                onClick={(evt: React.MouseEvent<HTMLButtonElement>) => {
                   onReplyClick(evt, true);
                   closeMenu();
                 }}
@@ -1599,7 +1599,7 @@ export const Event = React.memo(
       const stateEvent = typeof mEvent.getStateKey() === 'string';
       const handleContextMenu: MouseEventHandler<HTMLDivElement> = (evt) => {
         if (evt.altKey || !window.getSelection()?.isCollapsed) return;
-        const tag = (evt.target as any).tagName;
+        const tag = (evt.target as HTMLElement | null)?.tagName;
         if (typeof tag === 'string' && tag.toLowerCase() === 'a') return;
         evt.preventDefault();
         setMenuAnchor({

src/app/features/room/message/Reactions.tsx

@@ -202,7 +202,7 @@ export const Reactions = as<'div', ReactionsProps>(
         )}
         {reactions.length > 0 && (
           <Overlay
-            onContextMenu={(evt: any) => {
+            onContextMenu={(evt: React.MouseEvent) => {
               evt.stopPropagation();
             }}
             open={!!viewer}

src/app/pages/client/space/Space.tsx

@@ -378,7 +378,7 @@ export function SpaceTombstone({ roomId, replacementRoomId }: SpaceTombstoneProp
         <Text size="T200">This space has been replaced and is no longer active.</Text>
         {joinState.status === AsyncStatus.Error && (
           <Text className={BreakWord} style={{ color: color.Critical.Main }} size="T200">
-            {(joinState.error as any)?.message ?? 'Failed to join replacement space!'}
+            {(joinState.error as Error | undefined)?.message ?? 'Failed to join replacement space!'}
           </Text>
         )}
       </Box>

src/app/plugins/call/CallEmbed.ts

@@ -368,7 +368,7 @@ export class CallEmbed {
     return this.listenEvent('preparing', callback);
   }
 
-  public onPreparingError(callback: (error: any) => void) {
+  public onPreparingError(callback: (error: unknown) => void) {
     return this.listenEvent('error:preparing', callback);
   }
 

src/app/utils/lotusDenoiseUtils.ts

@@ -68,7 +68,9 @@ export const isMLDenoiseSupported = (): boolean => {
   // 1. AudioContext/webkitAudioContext (Web Audio API)
   // 2. AudioWorklet (Real-time processing in a background thread)
   // 3. getUserMedia (Microphone access)
-  const hasAudioContext = !!(window.AudioContext || (window as any).webkitAudioContext);
+  const hasAudioContext = !!(
+    window.AudioContext || (window as Window & { webkitAudioContext?: unknown }).webkitAudioContext
+  );
   // Use `typeof` rather than `!!AudioWorkletNode`: on a browser that has
   // AudioContext but no AudioWorkletNode binding (older Safari/Edge), a bare
   // reference throws ReferenceError, making this feature-detection helper throw

src/app/utils/matrix-uia.ts

@@ -72,7 +72,10 @@ export const getLoginTermUrl = (params: UIAParams): string | undefined => {
     if (terms.policies === null) return undefined;
     if ('privacy_policy' in terms.policies && typeof terms.policies.privacy_policy === 'object') {
       if (terms.policies.privacy_policy === null) return undefined;
-      const langToPolicy = terms.policies.privacy_policy as Record<string, any>;
+      const langToPolicy = terms.policies.privacy_policy as Record<
+        string,
+        { url?: string } | undefined
+      >;
       const url = langToPolicy.en?.url;
       if (typeof url === 'string') return url;
 

src/sw.ts

@@ -63,7 +63,7 @@ async function cleanupDeadClients() {
   });
 }
 
-function setSession(clientId: string, accessToken: any, baseUrl: any) {
+function setSession(clientId: string, accessToken: string, baseUrl: string) {
   if (typeof accessToken === 'string' && typeof baseUrl === 'string') {
     sessions.set(clientId, { accessToken, baseUrl });
   } else {