feat: App Config slide-in with Route column, clickable taps, and edit toolbar

- Add Route column to Traces & Taps table (diagram-based mapping, pending backend fix)
- Make tap badges clickable to navigate to route's Taps tab
- Add edit/save/cancel toolbar with design system Button components
- Move Sampling Rate to last position in settings grid
- Support ?tab= URL param on RouteDetail for direct tab navigation
- Bump @cameleer/design-system to 0.1.15 (DetailPanel overlay + backdrop)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ui/src/pages/Routes/RouteDetail.tsx

@@ -1,5 +1,5 @@
 import { useState, useMemo, useCallback } from 'react';
-import { useParams, useNavigate, Link } from 'react-router';
+import { useParams, useNavigate, useSearchParams, Link } from 'react-router';
 import {
   KpiStrip,
   Badge,
@@ -270,7 +270,8 @@ export default function RouteDetail() {
   const timeFrom = timeRange.start.toISOString();
   const timeTo = timeRange.end.toISOString();
 
-  const [activeTab, setActiveTab] = useState('performance');
+  const [searchParams] = useSearchParams();
+  const [activeTab, setActiveTab] = useState(searchParams.get('tab') || 'performance');
   const [recentSortField, setRecentSortField] = useState<string>('startTime');
   const [recentSortDir, setRecentSortDir] = useState<'asc' | 'desc'>('desc');