feat(rennmaeuse): Tiere-Liste neu im Rennmaus-Filter-Design

Filter-UX aus dem Design:
- Quick-Chip-Kategorien (Status/Geschlecht/Farbschlag/Herkunft) öffnen ein
  Bottom-Sheet mit Mehrfachauswahl (suchbar bei Farbschlag/Herkunft); aktive
  Filter als entfernbare Chips; Sortierung + "Externe Ahnen" als gleich große
  Chips (Sortierung öffnet dasselbe Drawer).
- Neue zweizeilige Tierkarte (Name + Geschlechts-Kreis + Status-Badge, Meta-Zeile),
  cardIn/Chip/Sheet-Animationen, Titel blendet beim Scrollen aus.

App-weit:
- Design-Palette (Creme/Braun/Terrakotta), Hanken-Grotesk-Schrift und gemeinsamer
  --shadow-Token; obere "Rennmaus-Manager"-Titelleiste entfernt (mobil bleibt die
  untere Aktionsleiste); fixe Shell-Höhe, nur der Hauptbereich scrollt.

Funktion:
- Infinite Scroll via useInfiniteList (seitenweise) + IntersectionObserver-Sentinel.
- Namensgenerator: Option männlich/weiblich/egal.
- Mehrfach-OR-Filter über gridify orGroup; e2e an die neue UI angepasst.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

gerbil-manager-web/src/hooks/useInfiniteList.ts

@@ -0,0 +1,116 @@
+/**
+ * Server-paginated infinite list (no react-query).
+ *
+ * `loader(page)` fetches ONE page; pages are accumulated into `items`. The list
+ * never loads everything up front — `loadMore()` (wired to a scroll sentinel)
+ * advances exactly one page at a time until `hasMore` is false.
+ *
+ * Changing `resetKey` (e.g. the filter/sort/search signature) clears the list and
+ * reloads from page 1. `reload()` re-fetches page 1 on demand (e.g. retry).
+ *
+ * Design mirrors useApi (and satisfies the strict react-hooks rules):
+ *  - the request signature lives in `req`; the query reset on `resetKey` change is
+ *    an in-render state adjustment (not a setState-in-effect), so no cascade.
+ *  - `loading` / `loadingMore` are DERIVED from resolved-vs-current request keys,
+ *    never set synchronously inside the fetch effect.
+ *  - the loader is read through a ref so the effect keys purely on the request id.
+ */
+import { useCallback, useEffect, useRef, useState } from 'react'
+import { messageFor } from './useApi'
+import type { Paged } from '../api/types'
+
+export interface InfiniteListState<T> {
+  items: T[]
+  total: number
+  /** Initial / reset load (page 1) in flight. */
+  loading: boolean
+  /** A subsequent page is being appended. */
+  loadingMore: boolean
+  error: string | null
+  hasMore: boolean
+  /** Advance one page; the scroll sentinel calls this. */
+  loadMore: () => void
+  /** Re-fetch from page 1 (retry). */
+  reload: () => void
+}
+
+interface Req {
+  key: string
+  page: number
+  nonce: number
+}
+
+interface Resolved<T> {
+  reqId: string
+  items: T[]
+  total: number
+  error: string | null
+}
+
+export function useInfiniteList<T>(
+  loader: (page: number) => Promise<Paged<T>>,
+  resetKey: string,
+): InfiniteListState<T> {
+  const loaderRef = useRef(loader)
+  useEffect(() => {
+    loaderRef.current = loader
+  })
+
+  const [req, setReq] = useState<Req>({ key: resetKey, page: 1, nonce: 0 })
+  // Adjust state during render when the query signature changes — the recommended
+  // pattern for deriving state from changed inputs (no setState-in-effect cascade).
+  if (req.key !== resetKey) {
+    setReq({ key: resetKey, page: 1, nonce: 0 })
+  }
+
+  const queryId = `${req.nonce}:${req.key}`
+  const reqId = `${queryId}#${req.page}`
+
+  const [resolved, setResolved] = useState<Resolved<T>>({
+    reqId: '',
+    items: [],
+    total: 0,
+    error: null,
+  })
+
+  useEffect(() => {
+    let cancelled = false
+    const page = req.page
+    const id = `${req.nonce}:${req.key}#${page}`
+    loaderRef
+      .current(page)
+      .then((res) => {
+        if (cancelled) return
+        setResolved((prev) => ({
+          reqId: id,
+          // page 1 replaces (fresh query); later pages append.
+          items: page === 1 ? res.items : [...prev.items, ...res.items],
+          total: res.totalCount,
+          error: null,
+        }))
+      })
+      .catch((err) => {
+        if (!cancelled) setResolved((prev) => ({ ...prev, reqId: id, error: messageFor(err) }))
+      })
+    return () => {
+      cancelled = true
+    }
+  }, [req]) // req is a fresh object per change (key/page/nonce) → one fetch per change
+
+  // Resolved data only counts if it belongs to the current query signature.
+  const resolvedQueryId = resolved.reqId.slice(0, resolved.reqId.lastIndexOf('#'))
+  const sameQuery = resolved.reqId !== '' && resolvedQueryId === queryId
+  const inFlight = resolved.reqId !== reqId
+
+  const items = sameQuery ? resolved.items : []
+  const total = sameQuery ? resolved.total : 0
+  const loading = !sameQuery || (inFlight && req.page === 1)
+  const loadingMore = sameQuery && inFlight && req.page > 1
+  const error = inFlight ? null : sameQuery ? resolved.error : null
+  const hasMore = sameQuery && !inFlight && items.length < total
+
+  const loadMore = useCallback(() => setReq((r) => ({ ...r, page: r.page + 1 })), [])
+  const reload = useCallback(() => setReq((r) => ({ key: r.key, page: 1, nonce: r.nonce + 1 })), [])
+
+  return { items, total, loading, loadingMore, error, hasMore, loadMore, reload }
+}