feat: add Ombi requests tab and webhook panel integration

- Add Ombi requests tab UI with movie/TV request display
- Add showAll parameter support for Ombi requests (API and SSE)
- Add Ombi webhook panel with enable/test functionality
- Add Ombi webhook status endpoint with metrics
- Add Ombi webhook test endpoint
- Change GET /api/ombi/requests to use OmbiRetriever instead of cache
- Add Ombi webhook state and API functions to frontend
- Update SSE payload to include Ombi baseUrl and requests

public/style.css

@@ -2029,3 +2029,157 @@ body {
   font-size: 0.9rem;
   font-weight: 600;
 }
+
+/* ===== Requests Tab ===== */
+.requests-container {
+  padding: 20px;
+}
+
+.requests-header {
+  margin-bottom: 20px;
+}
+
+.requests-header h2 {
+  margin: 0;
+  color: var(--text-primary);
+  font-size: 1.5rem;
+}
+
+.no-requests {
+  text-align: center;
+  padding: 40px 20px;
+  color: var(--text-muted);
+}
+
+.requests-list {
+  display: grid;
+  gap: 12px;
+}
+
+.request-card {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  padding: 16px;
+  background: var(--surface);
+  border: 1px solid var(--border);
+  border-radius: 8px;
+  transition: box-shadow 0.2s ease, border-color 0.2s ease;
+}
+
+.request-card:hover {
+  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
+  border-color: var(--accent);
+}
+
+.request-type-icon {
+  font-size: 1.5rem;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 40px;
+  height: 40px;
+  background: var(--surface-alt);
+  border-radius: 8px;
+  flex-shrink: 0;
+}
+
+.request-content {
+  flex: 1;
+  min-width: 0;
+}
+
+.request-title {
+  font-weight: 600;
+  color: var(--text-primary);
+  margin-bottom: 4px;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.request-meta {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  flex-wrap: wrap;
+  font-size: 0.85rem;
+  color: var(--text-secondary);
+}
+
+.request-status-badge {
+  padding: 2px 8px;
+  border-radius: 12px;
+  font-size: 0.75rem;
+  font-weight: 600;
+  text-transform: uppercase;
+}
+
+.request-status-badge.available {
+  background: var(--success-bg);
+  color: var(--success);
+}
+
+.request-status-badge.approved {
+  background: var(--info-bg);
+  color: var(--info);
+}
+
+.request-status-badge.denied {
+  background: var(--danger-bg);
+  color: var(--danger);
+}
+
+.request-status-badge.pending {
+  background: var(--surface-alt);
+  color: var(--text-muted);
+}
+
+.request-status-badge.unknown {
+  background: var(--surface-alt);
+  color: var(--text-muted);
+}
+
+.request-year {
+  color: var(--text-muted);
+}
+
+.request-user {
+  color: var(--text-secondary);
+}
+
+.request-quality {
+  background: var(--accent-light);
+  color: var(--accent);
+  padding: 2px 6px;
+  border-radius: 4px;
+  font-size: 0.75rem;
+  font-weight: 600;
+}
+
+.request-actions {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  flex-shrink: 0;
+}
+
+.request-link {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 8px;
+  background: var(--surface-alt);
+  border-radius: 6px;
+  transition: background 0.2s ease;
+}
+
+.request-link:hover {
+  background: var(--accent-light);
+}
+
+.request-icon {
+  height: 20px;
+  width: 20px;
+}
+