chore: delete unused SettingsDialog component

The SettingsDialog was imported but never used - the Settings menu
item opens a window via addWindow("settings", ...) instead.

https://claude.ai/code/session_01DiWUxiS5BAzU9mrKvCUuMW

src/components/SettingsDialog.tsx

@@ -1,36 +0,0 @@
-import {
-  Dialog,
-  DialogContent,
-  DialogDescription,
-  DialogHeader,
-  DialogTitle,
-} from "@/components/ui/dialog";
-import { Settings } from "lucide-react";
-
-interface SettingsDialogProps {
-  open: boolean;
-  onOpenChange: (open: boolean) => void;
-}
-
-export default function SettingsDialog({
-  open,
-  onOpenChange,
-}: SettingsDialogProps) {
-  return (
-    <Dialog open={open} onOpenChange={onOpenChange}>
-      <DialogContent className="sm:max-w-[400px]">
-        <DialogHeader>
-          <DialogTitle>Settings</DialogTitle>
-          <DialogDescription>
-            Manage your workspace preferences.
-          </DialogDescription>
-        </DialogHeader>
-
-        <div className="flex flex-col items-center justify-center py-12 text-center">
-          <Settings className="h-12 w-12 text-muted-foreground/50 mb-4" />
-          <p className="text-muted-foreground">Settings coming soon.</p>
-        </div>
-      </DialogContent>
-    </Dialog>
-  );
-}

src/components/nostr/user-menu.tsx

@@ -38,7 +38,6 @@ import {
 import { Avatar, AvatarFallback, AvatarImage } from "@/components/ui/avatar";
 import Nip05 from "./nip05";
 import { RelayLink } from "./RelayLink";
-import SettingsDialog from "@/components/SettingsDialog";
 import LoginDialog from "./LoginDialog";
 import ConnectWalletDialog from "@/components/ConnectWalletDialog";
 import { useState } from "react";
@@ -87,7 +86,6 @@ export default function UserMenu() {
   const relays = state.activeAccount?.relays;
   const blossomServers = state.activeAccount?.blossomServers;
   const nwcConnection = state.nwcConnection;
-  const [showSettings, setShowSettings] = useState(false);
   const [showLogin, setShowLogin] = useState(false);
   const [showConnectWallet, setShowConnectWallet] = useState(false);
   const [showWalletInfo, setShowWalletInfo] = useState(false);
@@ -182,7 +180,6 @@ export default function UserMenu() {
 
   return (
     <>
-      <SettingsDialog open={showSettings} onOpenChange={setShowSettings} />
       <LoginDialog open={showLogin} onOpenChange={setShowLogin} />
       <ConnectWalletDialog
         open={showConnectWallet}