v0.12.0 — Backup page overhaul: unified app rows, bug fixes, sequential chaining

Bug fixes:
- GetFullStatus() returns deep copy; CrossDriveSummary/UnconfiguredApps/CrossDriveWarnings
  are always nil in the copy so the handler builds them fresh (fixes duplicate-apps bug)
- Replace binary IsMountPoint check with tiered CheckBackupDestination() — path-not-exist,
  not-writable, system-drive (warning), disk >90-95% full; shown as warning vs critical
- Remove dead settingsAppBackupHandler / POST /settings/app-backup route (toggle wrote
  to settings.json but nothing consumed the flag)

Architecture:
- Unified per-app backup rows: new AppBackupRow struct + buildAppBackupRows() replaces
  the two old sections with expandable rows showing all 3 layers per app
- Sequential backup chaining: cross-drive runs immediately after restic (removed
  independent cross-drive-daily/cross-drive-weekly scheduler jobs)
- Deploy page: remove "Csak kézi indítás" schedule option; add weekly consistency note

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

controller/internal/web/templates/style.css

@@ -2436,3 +2436,140 @@ a.stat-card:hover {
     background: var(--red-bg);
     color: var(--red);
 }
+
+/* ─── Unified App Backup Rows ──────────────────────────────────────── */
+.app-backup-row {
+    border: 1px solid var(--border-color);
+    border-radius: 6px;
+    margin-bottom: .5rem;
+    background: var(--bg-secondary);
+    overflow: hidden;
+}
+.app-backup-row[data-status="red"] { border-left: 3px solid var(--red); }
+.app-backup-row[data-status="yellow"] { border-left: 3px solid var(--yellow); }
+.app-backup-row[data-status="green"] { border-left: 3px solid var(--green); }
+.app-backup-row[data-status="auto"] { border-left: 3px solid var(--text-muted); }
+
+.app-backup-row-header {
+    display: flex;
+    align-items: center;
+    gap: .75rem;
+    padding: .65rem 1rem;
+    cursor: pointer;
+    user-select: none;
+}
+.app-backup-row-header:hover {
+    background: var(--bg-hover, rgba(255,255,255,0.03));
+}
+.app-backup-row-name {
+    font-weight: 500;
+    font-size: .9rem;
+    flex: 1;
+}
+.app-backup-row-meta {
+    display: flex;
+    align-items: center;
+    gap: .5rem;
+}
+.expand-icon {
+    color: var(--text-muted);
+    font-size: .75rem;
+    flex-shrink: 0;
+}
+
+/* Status dot */
+.status-dot {
+    width: 10px;
+    height: 10px;
+    border-radius: 50%;
+    flex-shrink: 0;
+    display: inline-block;
+}
+.status-dot.status-green { background: var(--green); box-shadow: 0 0 0 2px rgba(76,175,80,.2); }
+.status-dot.status-yellow { background: var(--yellow); box-shadow: 0 0 0 2px rgba(255,193,7,.2); }
+.status-dot.status-red { background: var(--red); box-shadow: 0 0 0 2px rgba(244,67,54,.2); }
+.status-dot.status-auto { background: var(--text-muted); opacity: .6; }
+
+/* Expanded detail */
+.app-backup-row-detail {
+    border-top: 1px solid var(--border-color);
+    padding: .75rem 1rem;
+}
+.backup-layers {
+    display: flex;
+    flex-direction: column;
+    gap: .4rem;
+}
+.backup-layer-row {
+    display: flex;
+    align-items: center;
+    flex-wrap: wrap;
+    gap: .4rem;
+    font-size: .85rem;
+    padding: .2rem 0;
+}
+.backup-layer-row.layer-row-na {
+    opacity: .55;
+}
+.layer-label {
+    font-weight: 500;
+    min-width: 14rem;
+    color: var(--text-secondary);
+}
+.layer-badge {
+    background: rgba(0,136,204,.1);
+    color: var(--accent-light);
+    padding: .1rem .45rem;
+    border-radius: 3px;
+    font-size: .75rem;
+}
+.layer-na {
+    color: var(--text-muted);
+    font-style: italic;
+    font-size: .82rem;
+}
+.layer-method {
+    color: var(--text-secondary);
+    font-size: .82rem;
+}
+.layer-dest {
+    color: var(--text-secondary);
+    font-size: .82rem;
+}
+.layer-schedule {
+    color: var(--text-muted);
+    font-size: .8rem;
+}
+.layer-last {
+    color: var(--text-muted);
+    font-size: .8rem;
+    margin-left: .25rem;
+}
+.layer-unconfigured {
+    color: var(--yellow);
+    font-weight: 500;
+    font-size: .85rem;
+}
+.layer-actions {
+    display: flex;
+    gap: .35rem;
+    margin-left: auto;
+}
+.btn-xs {
+    padding: .15rem .5rem;
+    font-size: .75rem;
+    border-radius: 3px;
+}
+.layer-warnings {
+    margin-top: .5rem;
+    padding-top: .5rem;
+    border-top: 1px solid var(--border-color);
+}
+.backup-layer-warning {
+    font-size: .82rem;
+    color: var(--yellow);
+    padding: .2rem 0;
+}
+.text-ok { color: var(--green); }
+.text-error { color: var(--red); }
+.text-muted { color: var(--text-muted); }