Desktop entry + Wayland app id so the taskbar shows the app icon

frontend/electron/main.ts

@@ -563,6 +563,13 @@ function createWindow(): void {
   });
 }
 
+// Wayland has no per-window icons: the taskbar resolves the running app's id
+// through an installed .desktop file instead (see
+// scripts/install-desktop-entry.sh). Pin the identity before `ready`.
+if (process.platform === 'linux') {
+  app.setDesktopName('keynectr.desktop');
+}
+
 app.whenReady().then(() => {
   protocol.handle('app', (request) => {
     const { pathname } = new URL(request.url);

frontend/package.json

@@ -17,6 +17,7 @@
     "format:check": "prettier --check .",
     "electron:build": "tsc -p tsconfig.electron.json",
     "start": "npm run electron:build && electron .",
+    "desktop:install": "bash scripts/install-desktop-entry.sh",
     "dist": "npm run build && npm run electron:build && electron-builder --linux dir"
   },
   "dependencies": {

frontend/scripts/install-desktop-entry.sh

@@ -0,0 +1,42 @@
+#!/usr/bin/env bash
+# Install the Keynectr .desktop entry and icon for the current user.
+#
+# On Linux (especially Wayland) the taskbar icon does not come from the
+# BrowserWindow icon: the desktop environment resolves the running app's id
+# against an installed .desktop file and its Icon= key. This script installs
+# both so the hummingbird-key icon shows up in launchers and taskbars.
+set -euo pipefail
+
+ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+ICON_SRC="$ROOT/build/icon.png"
+ICON_DIR="$HOME/.local/share/icons/hicolor/512x512/apps"
+DESKTOP_DIR="$HOME/.local/share/applications"
+
+if [[ ! -f "$ICON_SRC" ]]; then
+  echo "Icon not found at $ICON_SRC" >&2
+  exit 1
+fi
+
+mkdir -p "$ICON_DIR" "$DESKTOP_DIR"
+cp "$ICON_SRC" "$ICON_DIR/keynectr.png"
+
+cat > "$DESKTOP_DIR/keynectr.desktop" <<EOF
+[Desktop Entry]
+Type=Application
+Name=Keynectr
+Comment=Manage Nostr profiles and publish notes
+Exec=bash -lc "cd '$ROOT' && npm start"
+Icon=keynectr
+Terminal=false
+Categories=Network;Utility;
+StartupWMClass=keynectr
+EOF
+
+# Refresh the desktop database so the new entry is picked up without a logout.
+update-desktop-database "$DESKTOP_DIR" 2>/dev/null || true
+command -v kbuildsycoca6 >/dev/null 2>&1 && kbuildsycoca6 --noincremental >/dev/null 2>&1 || true
+
+echo "Installed:"
+echo "  $ICON_DIR/keynectr.png"
+echo "  $DESKTOP_DIR/keynectr.desktop"
+echo "Restart Keynectr to see the icon in the taskbar."