Always show Accounts button, fix Linux CI electronDist

Show Accounts menu button even with no saved accounts so users can
add accounts from the in-game menu. Remove hardcoded electronDist
from electron-builder.yml — let electron-builder auto-detect on
Linux CI, Windows CI overrides via -c.electronDist flag.

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

electron-builder.yml

@@ -1,6 +1,5 @@
 appId: com.krunkercivilian.client
 productName: Krunker Civilian Client
-electronDist: node_modules/electron/dist
 directories:
   output: out
   buildResources: build

src/preload/index.ts

@@ -1493,9 +1493,7 @@ ipcRenderer.on('main_did-finish-load', () => {
     }
     // ── In-game Accounts quick-switch button ──
     if (isGamePage) {
-      ipcRenderer.invoke('alt-list').then((accounts: any[]) => {
+      ipcRenderer.invoke('alt-list').then(() => {
-        if (!accounts || accounts.length === 0) return;
-
         const altBtn = document.createElement('div');
         altBtn.id = 'kpcAltBtn';
         altBtn.className = 'menuItem';