feat: create autonomous Nivora package repository

Maintain a validated cross-distribution package catalog.
Automate upstream updates, isolated builds, diagnostics, and direct publication.
Build the official GitHub Desktop sources for Linux with working OAuth.

clash-verge-rev/postinstall.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+set -euo pipefail
+
+optional_refresh() {
+    local label=$1
+    shift
+    if ! "$@"; then
+        echo "Предупреждение: не удалось обновить ${label}." >&2
+    fi
+}
+
+if command -v update-desktop-database >/dev/null 2>&1; then
+    optional_refresh "desktop-базу" update-desktop-database -q /usr/share/applications
+fi
+if command -v gtk-update-icon-cache >/dev/null 2>&1; then
+    optional_refresh "кэш иконок" gtk-update-icon-cache -f -q /usr/share/icons/hicolor
+fi