Fix broken action buttons and add delete confirmation modal

- shares.js, users.js: JSON.stringify() inside onclick="..." attributes
  produced unescaped " chars that broke HTML attribute parsing — all
  dynamic onclick JSON now passed through esc() so the browser decodes
  " back to " before executing the handler
- Replace browser confirm() dialogs with a styled Bootstrap modal
  (#deleteModal) for share and user deletion — reusable across all tabs
- users.js: rename shadow variable 'confirm' → 'pwConfirm' to avoid
  shadowing the now-removed confirm() call
- main.js: auto-refresh now reloads shares and users every 30 s,
  not just the dashboard

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

static/js/main.js

@@ -1,4 +1,4 @@
 loadDashboard();
 loadShares();
 loadUsers();
-setInterval(loadDashboard, 30_000);
+setInterval(() => { loadDashboard(); loadShares(); loadUsers(); }, 30_000);

static/js/shares.js

@@ -9,21 +9,26 @@ async function loadShares() {
     } else {
         sb.innerHTML = shares.smb.map(s => {
             const enabled = s.enabled !== false;
-            const statusDot = `<span class="dot ${enabled ? 'dot-green' : 'dot-red'}" style="margin-right:0"></span>`;
+            const dot = `<span class="dot ${enabled ? 'dot-green' : 'dot-red'}" style="margin-right:0"></span>`;
+            // esc() HTML-encodes JSON so " inside onclick="..." doesn't break the attribute
+            const shareJson = esc(JSON.stringify(s));
+            const nameJson  = esc(JSON.stringify(s.name));
+            const pathJson  = esc(JSON.stringify(s.path));
+            const usersJson = esc(JSON.stringify(s.valid_users));
             return `<tr style="${enabled ? '' : 'opacity:.55'}">
                 <td>${esc(s.name)}</td>
                 <td><code>${esc(s.path)}</code></td>
                 <td style="color:var(--muted); font-size:.87em">${esc(s.valid_users || '—')}</td>
-                <td>${statusDot}</td>
+                <td>${dot}</td>
                 <td>
                     <button class="btn btn-sm me-1" style="border:1px solid var(--border); color:var(--muted)"
-                        onclick="openEditModal('smb',${JSON.stringify(s)})">Edit</button>
+                        onclick="openEditModal('smb',${shareJson})">Edit</button>
                     <button class="btn btn-sm me-1" style="border:1px solid var(--border); color:var(--muted)"
-                        onclick="openQuotaModal('smb',${JSON.stringify(s.name)},${JSON.stringify(s.path)},${JSON.stringify(s.valid_users)})">Quota</button>
+                        onclick="openQuotaModal('smb',${nameJson},${pathJson},${usersJson})">Quota</button>
                     <button class="btn btn-sm me-1" style="border:1px solid var(--border); color:var(--muted)"
-                        onclick="toggleShare('smb',${JSON.stringify(s.name)},${!enabled})">${enabled ? 'Disable' : 'Enable'}</button>
+                        onclick="toggleShare('smb',${nameJson},${!enabled})">${enabled ? 'Disable' : 'Enable'}</button>
                     <button class="btn btn-sm btn-danger"
-                        onclick="deleteShare('smb',${JSON.stringify(s.name)})">Delete</button>
+                        onclick="deleteShare('smb',${nameJson})">Delete</button>
                 </td>
             </tr>`;
         }).join('');
@@ -35,20 +40,22 @@ async function loadShares() {
     } else {
         nb.innerHTML = shares.nfs.map(s => {
             const enabled = s.enabled !== false;
-            const statusDot = `<span class="dot ${enabled ? 'dot-green' : 'dot-red'}" style="margin-right:0"></span>`;
+            const dot = `<span class="dot ${enabled ? 'dot-green' : 'dot-red'}" style="margin-right:0"></span>`;
+            const shareJson = esc(JSON.stringify(s));
+            const pathJson  = esc(JSON.stringify(s.path));
             return `<tr style="${enabled ? '' : 'opacity:.55'}">
                 <td><code>${esc(s.path)}</code></td>
                 <td style="color:var(--muted); font-size:.87em">${esc(s.clients)}</td>
-                <td>${statusDot}</td>
+                <td>${dot}</td>
                 <td>
                     <button class="btn btn-sm me-1" style="border:1px solid var(--border); color:var(--muted)"
-                        onclick="openEditModal('nfs',${JSON.stringify(s)})">Edit</button>
+                        onclick="openEditModal('nfs',${shareJson})">Edit</button>
                     <button class="btn btn-sm me-1" style="border:1px solid var(--border); color:var(--muted)"
-                        onclick="openQuotaModal('nfs',null,${JSON.stringify(s.path)},null)">Quota</button>
+                        onclick="openQuotaModal('nfs',null,${pathJson},null)">Quota</button>
                     <button class="btn btn-sm me-1" style="border:1px solid var(--border); color:var(--muted)"
-                        onclick="toggleShare('nfs',${JSON.stringify(s.path)},${!enabled})">${enabled ? 'Disable' : 'Enable'}</button>
+                        onclick="toggleShare('nfs',${pathJson},${!enabled})">${enabled ? 'Disable' : 'Enable'}</button>
                     <button class="btn btn-sm btn-danger"
-                        onclick="deleteShare('nfs',${JSON.stringify(s.path)})">Delete</button>
+                        onclick="deleteShare('nfs',${pathJson})">Delete</button>
                 </td>
             </tr>`;
         }).join('');
@@ -173,10 +180,16 @@ async function submitEdit() {
 
 // ===== DELETE =====
 
-async function deleteShare(type, identifier) {
+function deleteShare(type, identifier) {
     const label = type === 'smb' ? `SMB share "${identifier}"` : `NFS export "${identifier}"`;
-    if (!confirm(`Delete ${label}? This cannot be undone.`)) return;
+    document.getElementById('deleteModalMsg').textContent =
+        `Are you sure you want to delete ${label}? This cannot be undone.`;
 
+    const modal = new bootstrap.Modal(document.getElementById('deleteModal'));
+    const btn = document.getElementById('deleteModalConfirm');
+    const handler = async () => {
+        btn.removeEventListener('click', handler);
+        modal.hide();
         let res;
         if (type === 'smb') {
             res = await apiFetch(`/api/share/smb/${encodeURIComponent(identifier)}`, { method: 'DELETE' });
@@ -186,12 +199,14 @@ async function deleteShare(type, identifier) {
                 body: JSON.stringify({path: identifier}),
             });
         }
-
         if (!res) return;
         const data = await res.json();
         if (!res.ok) return showToast('Error: ' + (data.error || res.status), 'danger');
         showToast(`${label} deleted.`);
         loadShares(); loadDashboard();
+    };
+    btn.addEventListener('click', handler);
+    modal.show();
 }
 
 // ===== TOGGLE =====

static/js/users.js

@@ -7,8 +7,10 @@ async function loadUsers() {
         tb.innerHTML = `<tr><td colspan="4" style="color:var(--muted)">No users found.</td></tr>`;
         return;
     }
-    tb.innerHTML = users.map(u => `
+    tb.innerHTML = users.map(u => {
-        <tr>
+        // esc() HTML-encodes JSON so " inside onclick="..." doesn't break the attribute
+        const nameJson = esc(JSON.stringify(u.name));
+        return `<tr>
             <td>${esc(u.name)}</td>
             <td style="color:var(--muted)">${u.uid}</td>
             <td>
@@ -19,11 +21,12 @@ async function loadUsers() {
             </td>
             <td>
                 <button class="btn btn-sm me-1" style="border:1px solid var(--border); color:var(--muted)"
-                    onclick="openPwModal(${JSON.stringify(u.name)})">Password</button>
+                    onclick="openPwModal(${nameJson})">Password</button>
                 <button class="btn btn-sm btn-danger"
-                    onclick="deleteUser(${JSON.stringify(u.name)})">Delete</button>
+                    onclick="confirmDeleteUser(${nameJson})">Delete</button>
             </td>
-        </tr>`).join('');
+        </tr>`;
+    }).join('');
 }
 
 async function createUser() {
@@ -44,14 +47,24 @@ async function createUser() {
     loadUsers();
 }
 
-async function deleteUser(name) {
+function confirmDeleteUser(name) {
-    if (!confirm(`Delete user "${name}"? This cannot be undone.`)) return;
+    document.getElementById('deleteModalMsg').textContent =
+        `Are you sure you want to delete user "${name}"? This removes both the system account and SMB access.`;
+
+    const modal = new bootstrap.Modal(document.getElementById('deleteModal'));
+    const btn = document.getElementById('deleteModalConfirm');
+    const handler = async () => {
+        btn.removeEventListener('click', handler);
+        modal.hide();
         const res = await apiFetch(`/api/users/${encodeURIComponent(name)}`, { method: 'DELETE' });
         if (!res) return;
         const data = await res.json();
         if (!res.ok) return showToast('Error: ' + (data.error || res.status), 'danger');
         showToast(`User "${name}" deleted.`);
         loadUsers();
+    };
+    btn.addEventListener('click', handler);
+    modal.show();
 }
 
 function openPwModal(name) {
@@ -64,9 +77,9 @@ function openPwModal(name) {
 async function submitPassword() {
     const name = document.getElementById('pwUsername').value;
     const pw = document.getElementById('pwNew').value;
-    const confirm = document.getElementById('pwConfirm').value;
+    const pwConfirm = document.getElementById('pwConfirm').value;
     if (pw.length < 8) return showToast('Password must be at least 8 characters.', 'danger');
-    if (pw !== confirm) return showToast('Passwords do not match.', 'danger');
+    if (pw !== pwConfirm) return showToast('Passwords do not match.', 'danger');
 
     const res = await apiFetch(`/api/users/${encodeURIComponent(name)}/password`, {
         method: 'POST', headers: {'Content-Type': 'application/json'},

templates/index.html

@@ -65,6 +65,25 @@
     </div>
 </div>
 
+<!-- Delete confirm modal -->
+<div class="modal fade" id="deleteModal" tabindex="-1">
+    <div class="modal-dialog modal-sm">
+        <div class="modal-content">
+            <div class="modal-header border-0 pb-0">
+                <h5 class="modal-title" style="color:var(--red)">Delete</h5>
+                <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal"></button>
+            </div>
+            <div class="modal-body pt-2">
+                <p id="deleteModalMsg" class="mb-0" style="color:var(--muted)"></p>
+            </div>
+            <div class="modal-footer border-0 pt-0">
+                <button type="button" class="btn btn-secondary btn-sm" data-bs-dismiss="modal">Cancel</button>
+                <button type="button" class="btn btn-danger btn-sm" id="deleteModalConfirm">Delete</button>
+            </div>
+        </div>
+    </div>
+</div>
+
 <!-- Header -->
 <div class="topbar d-flex justify-content-between align-items-center">
     <span class="fw-semibold fs-5">MicroNAS</span>