Support multiple deploy template list URLs with cross-list dedupe

Add Settings UI to configure many Portainer-format template catalogs (not just one), merge them on fetch, drop duplicates by image/stack/title, and show source counts on the Deploy view.

ui/modern.css

@@ -1290,6 +1290,39 @@ textarea::placeholder {
   box-shadow: var(--shadow-md);
 }
 
+/* Template list URLs in Settings */
+.settings-template-urls {
+  max-height: 200px;
+  overflow-y: auto;
+  border: 1px solid var(--border-color);
+  border-radius: 10px;
+  background: var(--bg-elevated);
+}
+
+.settings-template-urls .list-group-item {
+  background: transparent;
+  border-color: var(--border-color);
+  color: var(--text-primary);
+  font-family: var(--font-mono);
+  font-size: 11.5px;
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 8px 10px;
+}
+
+.settings-template-urls .list-group-item .url-text {
+  flex: 1 1 auto;
+  min-width: 0;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.settings-template-urls .btn-remove-url {
+  flex: 0 0 auto;
+}
+
 /* Density prefs */
 body[data-density='compact'] .table > :not(caption) > * > * {
   padding: 0.35rem 0.5rem;

ui/ops-app.js

@@ -25,6 +25,14 @@ import {
 import { openCommandPalette, confirmDialog, statusBadge } from './components.js'
 import { showAlert } from '../libs/uiUtils.js'
 import notificationManager from '../libs/notifications.js'
+import {
+  DEFAULT_TEMPLATE_LIST_URLS,
+  getTemplateListUrls,
+  setTemplateListUrls,
+  normalizeTemplateListUrls,
+  fetchMergedTemplates,
+  clearMergedTemplateCache,
+} from '../client/templateLists.js'
 
 const SETTINGS_KEY = 'peardock.settings.v1'
 
@@ -446,6 +454,9 @@ export function appendLiveEvent(evt) {
   host.prepend(row)
 }
 
+/** @type {string[]} in-memory editor state for template list URLs */
+let templateUrlsDraft = []
+
 export function loadSettingsView() {
   const s = loadSettings()
   const dens = document.getElementById('settings-density')
@@ -464,6 +475,99 @@ export function loadSettingsView() {
          <div>Docker: ${c.dockerHealth?.ok ? 'ok' : '—'}</div>`
       : 'Not connected'
   }
+  templateUrlsDraft = getTemplateListUrls()
+  renderTemplateUrlsEditor()
+}
+
+function renderTemplateUrlsEditor() {
+  const host = document.getElementById('settings-template-urls')
+  if (!host) return
+  if (!templateUrlsDraft.length) {
+    host.innerHTML =
+      '<li class="list-group-item text-muted">No lists configured — default will be used on save.</li>'
+    return
+  }
+  host.innerHTML = templateUrlsDraft
+    .map(
+      (url, idx) => `
+    <li class="list-group-item" data-idx="${idx}">
+      <span class="url-text" title="${escape(url)}">${escape(url)}</span>
+      <button type="button" class="btn btn-sm btn-outline-danger btn-remove-url" data-idx="${idx}" title="Remove">
+        <i class="fas fa-xmark"></i>
+      </button>
+    </li>`
+    )
+    .join('')
+  host.querySelectorAll('.btn-remove-url').forEach((btn) => {
+    btn.addEventListener('click', () => {
+      const i = Number(btn.dataset.idx)
+      if (!Number.isFinite(i)) return
+      templateUrlsDraft = templateUrlsDraft.filter((_, j) => j !== i)
+      renderTemplateUrlsEditor()
+    })
+  })
+}
+
+function addTemplateUrlFromInput() {
+  const input = document.getElementById('settings-template-url-input')
+  const raw = input?.value?.trim() || ''
+  if (!raw) {
+    showAlert('warning', 'Enter a template list URL')
+    return
+  }
+  let href
+  try {
+    const u = new URL(raw)
+    if (u.protocol !== 'http:' && u.protocol !== 'https:') throw new Error('http(s) only')
+    href = u.href
+  } catch {
+    showAlert('danger', 'Invalid URL — use http(s)://…/templates.json')
+    return
+  }
+  if (templateUrlsDraft.includes(href)) {
+    showAlert('info', 'That list is already configured')
+    return
+  }
+  templateUrlsDraft = normalizeTemplateListUrls([...templateUrlsDraft, href])
+  if (input) input.value = ''
+  renderTemplateUrlsEditor()
+}
+
+/**
+ * Persist draft URLs and optionally force template re-fetch.
+ * @param {{ reload?: boolean }} [opts]
+ */
+export async function saveTemplateListSettings(opts = {}) {
+  const urls = setTemplateListUrls(templateUrlsDraft)
+  templateUrlsDraft = urls
+  renderTemplateUrlsEditor()
+  // Clear deploy-view cache so next open refetches
+  clearMergedTemplateCache()
+  if (typeof window !== 'undefined') {
+    window.__peardockClearDeployTemplateCache?.()
+  }
+  if (opts.reload) {
+    const status = document.getElementById('settings-template-lists-status')
+    if (status) status.textContent = 'Fetching catalogs…'
+    try {
+      const result = await fetchMergedTemplates(urls, { force: true })
+      if (typeof window !== 'undefined') {
+        window.__peardockSetDeployTemplates?.(result.templates, result.stats)
+      }
+      const st = result.stats
+      const msg = `Loaded ${st.unique} templates from ${st.sources} list(s)` +
+        (st.duplicates ? ` · removed ${st.duplicates} duplicate(s)` : '') +
+        (st.errors?.length ? ` · ${st.errors.length} list(s) failed` : '')
+      if (status) status.textContent = msg
+      showAlert(st.errors?.length && !st.unique ? 'danger' : 'success', msg)
+      return result
+    } catch (err) {
+      if (status) status.textContent = err.message || 'Reload failed'
+      showAlert('danger', err.message || 'Failed to reload templates')
+      return null
+    }
+  }
+  return urls
 }
 
 export function openPalette(navigateToView) {
@@ -555,17 +659,40 @@ export function initOpsApp({ navigateToView, sendCommand }) {
   document.getElementById('events-filter')?.addEventListener('input', () => loadEventsView())
 
   document.getElementById('settings-save-btn')?.addEventListener('click', () => {
+    // Include multi template list URLs
+    setTemplateListUrls(templateUrlsDraft)
     const next = saveSettings({
       density: document.getElementById('settings-density')?.value,
       confirmDestructive: document.getElementById('settings-confirm')?.value !== '0',
       refreshSeconds: Number(document.getElementById('settings-refresh')?.value) || 0,
+      templateListUrls: getTemplateListUrls(),
     })
     startListAutoRefresh(next.refreshSeconds)
+    if (typeof window !== 'undefined') window.__peardockClearDeployTemplateCache?.()
     showAlert('success', 'Preferences saved')
   })
 
+  document.getElementById('settings-template-url-add')?.addEventListener('click', () => {
+    addTemplateUrlFromInput()
+  })
+  document.getElementById('settings-template-url-input')?.addEventListener('keydown', (e) => {
+    if (e.key === 'Enter') {
+      e.preventDefault()
+      addTemplateUrlFromInput()
+    }
+  })
+  document.getElementById('settings-template-url-reset')?.addEventListener('click', () => {
+    templateUrlsDraft = [...DEFAULT_TEMPLATE_LIST_URLS]
+    renderTemplateUrlsEditor()
+    showAlert('info', 'Default template list restored (save preferences to apply)')
+  })
+  document.getElementById('settings-template-reload')?.addEventListener('click', () => {
+    saveTemplateListSettings({ reload: true })
+  })
+
   // Apply density + refresh on boot
   applySettings(loadSettings())
+  templateUrlsDraft = getTemplateListUrls()
 
   subscribeJobs((job) => showJob(job))
 
@@ -641,6 +768,10 @@ export function initOpsApp({ navigateToView, sendCommand }) {
     loadSettings,
     applySettings,
     startListAutoRefresh,
+    getTemplateListUrls,
+    setTemplateListUrls,
+    saveTemplateListSettings,
+    fetchMergedTemplates,
     loadHostView,
     loadEventsView,
     loadSettingsView,