chore: upgrade TypeScript 4.9 to 5.9, ESLint 8.29 to 8.57, @typescript-eslint 5 to 7

Resolves all TS2345/TS2347/TS7006 type errors introduced by stricter TypeScript 5.x.
Fix Icons.Settings to Icons.Setting, cast account data returns, fix implicit any.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

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

@@ -39,7 +39,8 @@ export function ForwardMessageDialog({ mEvent, onClose }: Props) {
   const forward = (roomId: string, roomName: string) => {
     const fwdContent: Record<string, unknown> = { ...mEvent.getContent() };
     delete fwdContent['m.relates_to'];
-    mx.sendEvent(roomId, mEvent.getType(), fwdContent as any);
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    (mx as any).sendEvent(roomId, mEvent.getType(), fwdContent);
     setSentTo(roomName);
     setTimeout(onClose, 1200);
   };

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

@@ -83,6 +83,7 @@ import { MemberPowerTag, StateEvent } from '../../../../types/matrix/room';
 import { PowerIcon } from '../../../components/power';
 import colorMXID from '../../../../util/colorMXID';
 import { getPowerTagIconSrc } from '../../../hooks/useMemberPowerTag';
+import { ForwardMessageDialog } from './ForwardMessageDialog';
 
 // Delivery status indicator for own messages
 function DeliveryStatus({

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

@@ -153,7 +153,8 @@ export const MessageEditor = as<'div', MessageEditorProps>(
           },
         };
 
-        return mx.sendMessage(roomId, content);
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        return mx.sendMessage(roomId, content as any);
       }, [mx, editor, roomId, mEvent, isMarkdown, getPrevBodyAndFormattedBody]),
     );