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.

package-lock.json

@@ -21,6 +21,7 @@
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         "react": "^19.0.0",
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@@ -5846,6 +5847,57 @@
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+      "license": "MIT",
+      "dependencies": {
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+      },
+      "engines": {
+        "node": ">=20.0.0"
+      },
+      "peerDependencies": {
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+      "license": "MIT",
+      "engines": {
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+        "url": "https://opencollective.com/express"
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     "node_modules/recast": {
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       "resolved": "https://registry.npmjs.org/recast/-/recast-0.23.11.tgz",
@@ -6146,6 +6198,12 @@
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