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

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}