OPEN-ISP v0.5 (pickle-lime) — rilis open-source perdana

Aplikasi billing & manajemen ISP (fiber optic) — PWA pelanggan, portal teknisi & kolektor,
admin panel lengkap, multi-vendor OLT, RADIUS, WhatsApp/Telegram, pembayaran QRIS.

Kredit & lisensi (ISC):
- Base kode & repo: alijayanet/billing-rtrw oleh Alijaya Net — terima kasih banyak
  atas base kode dan repo yang bermanfaat.
- Add-on: GoWA, LibreSpeed/OpenSpeedTest, Uptime Kuma, notification-forwarder.
- Dikembangkan menjadi OPEN-ISP oleh oxpoe — https://github.com/oxpoe/open-isp

public/js/theme.js

@@ -0,0 +1,44 @@
+(function() {
+  const savedTheme = localStorage.getItem('app-theme') || 'dark';
+  document.documentElement.setAttribute('data-theme', savedTheme);
+  if (savedTheme === 'light') {
+    document.body?.classList.add('light-theme');
+  }
+})();
+
+function toggleAppTheme() {
+  const currentTheme = document.documentElement.getAttribute('data-theme') || 'dark';
+  const newTheme = currentTheme === 'dark' ? 'light' : 'dark';
+  document.documentElement.setAttribute('data-theme', newTheme);
+  if (document.body) {
+    document.body.classList.toggle('light-theme', newTheme === 'light');
+  }
+  localStorage.setItem('app-theme', newTheme);
+  updateThemeToggleIcons(newTheme);
+}
+
+function updateThemeToggleIcons(theme) {
+  const icons = document.querySelectorAll('.theme-toggle-icon');
+  const btns = document.querySelectorAll('.theme-toggle-btn');
+  icons.forEach(icon => {
+    if (theme === 'light') {
+      icon.className = 'bi bi-sun-fill theme-toggle-icon';
+      icon.style.color = '#f59e0b';
+    } else {
+      icon.className = 'bi bi-moon-stars-fill theme-toggle-icon';
+      icon.style.color = '#fbbf24';
+    }
+  });
+  btns.forEach(btn => {
+    btn.setAttribute('title', theme === 'light' ? 'Ganti ke Mode Gelap (Dark)' : 'Ganti ke Mode Terang (Light)');
+  });
+}
+
+document.addEventListener('DOMContentLoaded', () => {
+  const theme = localStorage.getItem('app-theme') || 'dark';
+  document.documentElement.setAttribute('data-theme', theme);
+  if (theme === 'light') {
+    document.body?.classList.add('light-theme');
+  }
+  updateThemeToggleIcons(theme);
+});