Add routing, cast API conversion, and filters

Introduce client-side routing and cast API support. Key changes:

- Add react-router-dom dependency and wire BrowserRouter in App.
- Convert App to route-based structure (/, /media/:id, /cast, /cast/:id, /add, /import) with MediaDetailRoute and CastDetailRoute helpers.
- Extend API types for cast items and add convertApiCastToStaff; fetchAllCast now returns Staff[] (mapped via converter).
- Update components to use react-router hooks (useNavigate, useParams, useLocation, Link/NavLink): Header links, DetailView, CastDetailView, AddMediaView, ImporterView and others now navigate via routes.
- Enhance CastView: fetch cast list, loading state, persistent search/sort/filter controls, filtering by occupations/media types and enabled categories, improved pagination and UI controls.
- Update stashapp importer: add configurable blacklist check to skip scenes, increase per_page for queries.

These changes consolidate navigation, improve cast data handling from the API, and add richer filtering and importer controls.

src/components/ImporterView.tsx

@@ -1,4 +1,5 @@
 import { useState, useRef, useEffect } from 'react';
+import { useNavigate } from 'react-router-dom';
 import { ArrowLeft, Download, Settings, RefreshCw, CheckCircle, XCircle, AlertCircle, Users, Film, Loader2 } from 'lucide-react';
 import { Button } from '@/components/ui/button';
 import { cn } from '@/lib/utils';
@@ -6,7 +7,8 @@ import { importFromXBVR, XBVRConfig, ImportProgress } from '@/lib/xbvrImporter';
 import { importFromStashAPP, StashAPPConfig, updateActorsFromStashAPP } from '@/lib/stashappImporter';
 import { importFromPlaynite, PlayniteConfig } from '@/lib/playniteImporter';
 
-export default function ImporterView({ onBack }: { onBack: () => void }) {
+export default function ImporterView() {
+  const navigate = useNavigate();
   const [xbvrConfig, setXbvrConfig] = useState<XBVRConfig>({ url: import.meta.env.VITE_XBVR_URL || '' });
   const [stashappConfig, setStashappConfig] = useState<StashAPPConfig>({ 
     url: import.meta.env.VITE_STASHAPP_URL || '', 
@@ -159,7 +161,7 @@ export default function ImporterView({ onBack }: { onBack: () => void }) {
           <Button
             variant="ghost"
             size="icon"
-            onClick={onBack}
+            onClick={() => navigate('/')}
             className="text-zinc-600 hover:text-[#6d28d9]"
           >
             <ArrowLeft size={20} />