fix(icons): remove remaining electrs icon references, use electrumx.png

GoalDetail.vue, EasyHome.vue, and the backend's docker_packages.rs
metadata still pointed electrs-family app ids at the old electrs
icon (svg). Point them at electrumx.png like every other reference,
and delete the now-unused electrs.svg asset.

neode-ui/src/components/EasyHome.vue

@@ -72,7 +72,8 @@ const APP_ICON_MAP: Record<string, string> = {
   nextcloud: '/assets/img/app-icons/nextcloud.webp',
   fedimint: '/assets/img/app-icons/fedimint.png',
   mempool: '/assets/img/app-icons/mempool.webp',
-  electrs: '/assets/img/app-icons/electrs.svg',
+  electrs: '/assets/img/app-icons/electrumx.png',
+  electrumx: '/assets/img/app-icons/electrumx.png',
 }
 
 function goalAppIcons(goal: GoalDefinition): { appId: string; url: string }[] {

neode-ui/src/views/GoalDetail.vue

@@ -180,7 +180,8 @@ const APP_ICON_MAP: Record<string, string> = {
   nextcloud: '/assets/img/app-icons/nextcloud.webp',
   fedimint: '/assets/img/app-icons/fedimint.png',
   mempool: '/assets/img/app-icons/mempool.webp',
-  electrs: '/assets/img/app-icons/electrs.svg',
+  electrs: '/assets/img/app-icons/electrumx.png',
+  electrumx: '/assets/img/app-icons/electrumx.png',
 }
 
 function stepIconUrl(step: GoalStep): string | undefined {

neode-ui/src/views/apps/appsConfig.ts

@@ -240,12 +240,9 @@ const APP_ICON_FALLBACKS: Record<string, string> = {
   'archy-lnd-ui': '/assets/img/app-icons/lnd.png',
   'archy-electrs-ui': '/assets/img/app-icons/electrumx.png',
   // ElectrumX ships under a few historical ids (the backend was renamed
-  // electrs → electrumx). Without an explicit map, an `electrs`-keyed install
-  // falls through to the default `/assets/img/app-icons/electrs.png`, which
-  // doesn't exist → handleImageError swaps .png→.svg and lands on electrs.svg
-  // (the "Electrs in Rust" logo) instead of the real ElectrumX icon. Pin the
-  // whole family to the ElectrumX icon so My Apps shows the right logo no
-  // matter which id the node has it installed under.
+  // electrs → electrumx). Pin the whole family to the ElectrumX icon so My
+  // Apps shows the right logo no matter which id the node has it installed
+  // under.
   'electrs': '/assets/img/app-icons/electrumx.png',
   'electrs-ui': '/assets/img/app-icons/electrumx.png',
   'electrumx': '/assets/img/app-icons/electrumx.png',