feat(updater): mirror auto-check line to fleet Updates tab; in-banner Check-now

Extends the per-app Updates treatment to the fleet App Center → Overview →
Updates list, and folds the manual check into the status line so it's the one
canonical (secondary) affordance rather than a top-level tab button:

- updater-page.js: renderAutoCheckLine() now ends with a right-aligned "↻ Check
  now" button (data-updater-action="check" — both surfaces already wire it).
- overview-manager.js: drop the "Check"/"Check now" button from the Updates tab
  header (keep "Update all", only when updates exist); lead renderUpdates() with
  the auto-check line.
- overview.css: .updater-autocheck wraps on narrow widths; .updater-autocheck-btn
  sits right (margin-left:auto), smaller.
- app-tabbed-manager.js: friendlier no-data copy ("You're all caught up — no
  updates found for this app.").

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

containers/libreportal/frontend/components/apps/core/js/app-tabbed-manager.js

@@ -594,7 +594,7 @@ class AppTabbedManager {
     const autoLine = this.appUpdater.renderAutoCheckLine();
     const body = app
       ? this.appUpdater.renderAppDetail(app, { includeVersion: true })
-      : `<div class="updater-empty">No scan data for this app yet — the first automatic check will fill this in shortly.</div>`;
+      : `<div class="updater-empty">You're all caught up — no updates found for this app.</div>`;
     section.innerHTML = this.renderAppUpdaterHead(app) +
       `<div class="updater-detail-container">${autoLine}${body}</div>`;
   }

containers/libreportal/frontend/components/apps/overview/css/overview.css

@@ -367,6 +367,7 @@
 .updater-autocheck {
   display: flex;
   align-items: center;
+  flex-wrap: wrap;
   gap: 9px;
   margin: 0 0 14px;
   padding: 9px 12px;
@@ -377,6 +378,10 @@
   color: rgba(var(--text-rgb), .72);
 }
 .updater-autocheck strong { color: var(--text-primary, #fff); font-weight: 600; }
+.updater-autocheck-text { min-width: 0; }
+/* Manual check lives here (right side), not as a top-level tab button — a nudge
+   for the automatic scan, not the primary way updates are found. */
+.updater-autocheck-btn { margin-left: auto; flex: 0 0 auto; padding: 4px 11px; font-size: .78rem; }
 .updater-autocheck-dot {
   width: 7px; height: 7px; border-radius: 50%; flex: 0 0 auto;
   background: #36d399; box-shadow: 0 0 8px rgba(54, 211, 153, .6);

containers/libreportal/frontend/components/apps/overview/js/overview-manager.js

@@ -190,8 +190,10 @@ class OverviewManager {
         const open = Array.from(document.querySelectorAll('#overview-view .ov-row-details:not([hidden])'))
           .map((d) => d.id.replace(/^ov-detail-/, ''));
         const anyUpdate = !!(this.updater && this.updater.apps.some((a) => a.update_available));
-        const actions = checkBtn('Check')
-          + (anyUpdate ? ` <button class="updater-btn updater-btn-primary" data-updater-action="update-all">Update all</button>` : '');
+        // No manual "Check" in the header — the auto-check line at the top of the
+        // body carries the (secondary) Check-now nudge. Only the real "Update all"
+        // action lives up here, and only when there's actually something to apply.
+        const actions = anyUpdate ? `<button class="updater-btn updater-btn-primary" data-updater-action="update-all">Update all</button>` : '';
         pane.innerHTML = this.renderHeader(id, actions) + body(this.renderUpdates());
         open.forEach((app) => this._openDetail(app));
         this._honorAppDeepLink();
@@ -524,9 +526,11 @@ class OverviewManager {
     const chip = (id, label, n) =>
       `<button class="ov-chip${this.filter === id ? ' active' : ''}" data-overview-action="filter" data-filter="${id}">${label}${n != null ? ` <span class="ov-chip-n">${n}</span>` : ''}</button>`;
     const rows = shown.map((a) => this.updateRow(a)).join('') || `<div class="updater-empty">Nothing matches this filter.</div>`;
-    // Check / Update all live in the tab header's action slot (renderTab), so
-    // the toolbar is just the filter chips.
+    // The auto-check line leads the body (with its right-side Check-now nudge);
+    // "Update all" lives in the tab header's action slot (renderTab), so the
+    // toolbar is just the filter chips.
     return `
+      ${up.renderAutoCheckLine()}
       <div class="updater-toolbar ov-toolbar">
         <div class="ov-chips">${chip('all', 'All', up.apps.length)}${chip('updates', 'Updates', nUpd)}${chip('security', 'Security', nSec)}</div>
       </div>

containers/libreportal/frontend/components/updater/js/updater-page.js

@@ -575,7 +575,8 @@ class UpdaterPage {
       nextBit = ` · next check ${this.fmtRelFuture(Date.parse(gen) + iv * 60000)}`;
     }
     return `<div class="updater-autocheck${off}"><span class="updater-autocheck-dot"></span>` +
-      `<span>Checked automatically · last checked <strong>${last}</strong>${nextBit}</span></div>`;
+      `<span class="updater-autocheck-text">Checked automatically · last checked <strong>${last}</strong>${nextBit}</span>` +
+      `<button class="updater-btn updater-autocheck-btn" data-updater-action="check" title="Check for updates now">↻ Check now</button></div>`;
   }
 }