[ci skip] Move Terraform modules into stack directories

Move all 88 service modules (66 individual + 22 platform) from
modules/kubernetes/<service>/ into their corresponding stack directories:

- Service stacks: stacks/<service>/module/
- Platform stack: stacks/platform/modules/<service>/

This collocates module source code with its Terragrunt definition.
Only shared utility modules remain in modules/kubernetes/:
ingress_factory, setup_tls_secret, dockerhub_secret, oauth-proxy.

All cross-references to shared modules updated to use correct
relative paths. Verified with terragrunt run --all -- plan:
0 adds, 0 destroys across all 68 stacks.

stacks/f1-stream/module/files/static/js/app.js

@@ -0,0 +1,121 @@
+// Toast notification system
+const TOAST_ICONS = {
+  success: '\u2705',
+  error: '\u274C',
+  warning: '\u26A0\uFE0F',
+  info: '\u2139\uFE0F'
+};
+
+function showToast(message, type = 'info', duration = 4000) {
+  const container = document.getElementById('toast-container');
+  const toast = document.createElement('div');
+  toast.className = `toast ${type}`;
+  toast.innerHTML = `
+    <span class="toast-icon">${TOAST_ICONS[type] || TOAST_ICONS.info}</span>
+    <span class="toast-message">${escapeHtml(message)}</span>
+    <button class="toast-close" onclick="dismissToast(this.parentElement)">&times;</button>
+  `;
+  container.appendChild(toast);
+
+  if (duration > 0) {
+    setTimeout(() => dismissToast(toast), duration);
+  }
+}
+
+function dismissToast(toast) {
+  if (!toast || toast.classList.contains('toast-out')) return;
+  toast.classList.add('toast-out');
+  toast.addEventListener('animationend', () => toast.remove());
+}
+
+// Confirm dialog (replaces window.confirm)
+function showConfirm(message) {
+  return new Promise((resolve) => {
+    const overlay = document.createElement('div');
+    overlay.className = 'confirm-overlay';
+    overlay.innerHTML = `
+      <div class="confirm-box">
+        <div class="confirm-msg">${escapeHtml(message)}</div>
+        <div class="confirm-actions">
+          <button class="btn-secondary" id="confirm-cancel">Cancel</button>
+          <button class="btn-primary" id="confirm-ok">Confirm</button>
+        </div>
+      </div>
+    `;
+    document.body.appendChild(overlay);
+
+    overlay.querySelector('#confirm-ok').addEventListener('click', () => {
+      overlay.remove();
+      resolve(true);
+    });
+    overlay.querySelector('#confirm-cancel').addEventListener('click', () => {
+      overlay.remove();
+      resolve(false);
+    });
+    overlay.addEventListener('click', (e) => {
+      if (e.target === overlay) {
+        overlay.remove();
+        resolve(false);
+      }
+    });
+  });
+}
+
+// Mobile nav hamburger toggle
+function toggleMobileNav() {
+  const tabs = document.getElementById('tabs');
+  tabs.classList.toggle('open');
+}
+
+// Tab switching
+function switchTab(tab) {
+  closeRedditViewer();
+
+  document.querySelectorAll('.tab-btn').forEach(b => {
+    b.classList.toggle('active', b.dataset.tab === tab);
+  });
+  document.querySelectorAll('.tab-content').forEach(c => {
+    c.classList.toggle('active', c.id === 'content-' + tab);
+  });
+
+  // Close mobile nav
+  document.getElementById('tabs').classList.remove('open');
+
+  // Load data for the tab
+  switch (tab) {
+    case 'streams':
+      loadPublicStreams();
+      break;
+    case 'reddit':
+      loadRedditLinks();
+      break;
+    case 'mine':
+      loadMyStreams();
+      break;
+    case 'admin':
+      loadAdminStreams();
+      break;
+  }
+}
+
+// Initialize
+document.addEventListener('DOMContentLoaded', async () => {
+  checkAuth();
+  await loadPublicStreams();
+
+  const grid = document.getElementById('stream-grid');
+  const badge = document.getElementById('live-badge');
+  if (badge && grid && grid.children.length > 0) {
+    badge.hidden = false;
+  }
+});
+
+// Close Reddit viewer on Escape
+document.addEventListener('keydown', (e) => {
+  if (e.key === 'Escape') {
+    const viewer = document.getElementById('reddit-viewer');
+    if (viewer && !viewer.classList.contains('hidden')) {
+      closeRedditViewer();
+    }
+  }
+});