fix(audit): replace 'coming soon' tab stubs (H7 + R2-M5)

H7: Three tabs were rendering "coming soon" placeholders to every user
on every detail page:
- Client Files: now uses ClientFilesTab (already existed) which renders
  the FileGrid + upload zone via /api/v1/files?clientId=...
- Client Reservations: split into Active / History sections; History
  lazy-loads ended + cancelled reservations on demand from
  /api/v1/berth-reservations?clientId=&status=
- Berth Waiting List + Maintenance Log: removed from buildBerthTabs
  until the underlying surfaces ship (schema tables exist; UIs don't)

R2-M5: Company Documents tab was a "Coming soon" EmptyState. Removed
from buildCompanyTabs until /api/v1/files accepts a companyId filter
(schema supports it, validator doesn't).

1175/1175 vitest passing.

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

src/components/clients/client-tabs.tsx

@@ -14,6 +14,7 @@ import { ClientPipelineSummary } from '@/components/clients/client-pipeline-summ
 import { ClientYachtsTab } from '@/components/clients/client-yachts-tab';
 import { ClientCompaniesTab } from '@/components/clients/client-companies-tab';
 import { ClientReservationsTab } from '@/components/clients/client-reservations-tab';
+import { ClientFilesTab } from '@/components/clients/client-files-tab';
 import { ContactsEditor } from '@/components/clients/contacts-editor';
 import { AddressesEditor, type Address } from '@/components/shared/addresses-editor';
 import { EntityActivityFeed } from '@/components/shared/entity-activity-feed';
@@ -271,11 +272,7 @@ export function getClientTabs({ clientId, currentUserId, client }: ClientTabsOpt
     {
       id: 'files',
       label: 'Files',
-      content: (
-        <div className="text-center py-12 text-muted-foreground">
-          <p>File attachments coming soon.</p>
-        </div>
-      ),
+      content: <ClientFilesTab clientId={clientId} />,
     },
     {
       id: 'activity',