chore(release): point updater feed at updates.mailib.ru (v1.0.16)

Set build.publish.url to the production HTTPS feed, bump version to 1.0.16, add publish-to-updates.ps1 for VPS upload, and normalize Linux AppImage names from x86_64 to x64 after pack:linux.

Co-authored-by: Cursor <cursoragent@cursor.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "TTRPGPlayer",
-  "version": "1.0.15",
+  "version": "1.0.16",
   "description": "TTRPG Player — редактор и проигрыватель НРИ",
   "main": "dist/main/index.cjs",
   "scripts": {
@@ -19,7 +19,8 @@
     "pack:dir": "npm run build && node scripts/release-win-prep.mjs && electron-builder --dir",
     "pack:mac": "npm run build && electron-builder --mac",
     "pack:win": "npm run build && node scripts/release-win-prep.mjs && electron-builder --win",
-    "pack:linux": "node scripts/release-linux-pack.mjs"
+    "pack:linux": "node scripts/release-linux-pack.mjs",
+    "publish:updates": "powershell -ExecutionPolicy Bypass -File scripts/publish-to-updates.ps1"
   },
   "keywords": [],
   "author": "",
@@ -165,7 +166,7 @@
     },
     "publish": {
       "provider": "generic",
-      "url": "https://updates.invalid.ttrpg/"
+      "url": "https://updates.mailib.ru/"
     }
   }
 }