feat(mobile): show entity name in mobile topbar on detail pages

Detail pages (clients, yachts, companies, berths, invoices, expenses)
now push their entity name + a back-button toggle to the mobile
topbar via useMobileChrome, replacing the URL UUID fallback that was
rendering before.

Supporting changes:
  - useMobileChrome() no longer throws when called outside the
    MobileLayoutProvider — desktop-tree consumers get a no-op
    setChrome so callers don't have to branch on shell type.
  - setChrome is now stable across renders (useCallback) so callers'
    useEffect dependency arrays don't infinite-loop.
  - DetailPageShell now also pushes its entityName + cleans up on
    unmount, and hides its desktop-only sticky header on mobile so it
    doesn't double up with the topbar (no current callers, prep for
    Phase 4 migration).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/components/invoices/invoice-detail.tsx

@@ -1,6 +1,6 @@
 'use client';
 
-import { useState } from 'react';
+import { useState, useEffect } from 'react';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
 
 import { Loader2, Send, CreditCard } from 'lucide-react';
@@ -15,6 +15,7 @@ import { Input } from '@/components/ui/input';
 import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/tabs';
 import { InvoicePdfPreview } from './invoice-pdf-preview';
 import { apiFetch } from '@/lib/api/client';
+import { useMobileChrome } from '@/components/layout/mobile/mobile-layout-provider';
 import { recordPaymentSchema, type RecordPaymentInput } from '@/lib/validators/invoices';
 
 const STATUS_COLORS: Record<string, string> = {
@@ -40,6 +41,13 @@ export function InvoiceDetail({ invoiceId }: InvoiceDetailProps) {
     queryFn: () => apiFetch<{ data: any }>(`/api/v1/invoices/${invoiceId}`),
   });
 
+  const { setChrome } = useMobileChrome();
+  const titleForChrome: string | null = data?.data?.invoiceNumber ?? null;
+  useEffect(() => {
+    setChrome({ title: titleForChrome, showBackButton: true });
+    return () => setChrome({ title: null, showBackButton: false });
+  }, [titleForChrome, setChrome]);
+
   const sendMutation = useMutation({
     mutationFn: () => apiFetch(`/api/v1/invoices/${invoiceId}/send`, { method: 'POST' }),
     onSuccess: () => {