feat(11-06): SavedSearchBar UI — save/load/rename/delete profiles (FILTER-06)

GREEN phase — extends tender-radar-api.ts with listSavedSearches/
createSavedSearch/updateSavedSearch/deleteSavedSearch (plain fetch,
credentials: include), adds SavedSearchBar with the
serializeFiltersFromSearchParams/filtersToSearchParams round-trip helpers
(URL searchParams <-> filters JSON, deliberately excluding page/tender —
navigation state, not filter state), and mounts it above FilterPanel in
page.tsx. Hardcoded German UI per phase convention.

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

apps/web/src/app/(portal)/modules/tender-radar/page.tsx

@@ -5,6 +5,7 @@ import { useRouter, useSearchParams } from 'next/navigation';
 import { CoverageBanner } from './components/CoverageBanner';
 import { FilterPanel } from './components/FilterPanel';
 import { ResultsList } from './components/ResultsList';
+import { SavedSearchBar } from './components/SavedSearchBar';
 import { TenderDetail } from './components/TenderDetail';
 
 /**
@@ -28,6 +29,11 @@ import { TenderDetail } from './components/TenderDetail';
  * `dynamic(..., { ssr: false })` (module-loader.ts), per the plan's
  * explicit Next 16 guidance.
  *
+ * Plan 11-06 (FILTER-06, D-08/D-11): SavedSearchBar renders above
+ * FilterPanel — it reads/writes the same URL searchParams FilterPanel
+ * uses, so saving/loading a profile is congruent with the filter state the
+ * user currently sees.
+ *
  * Intentional hardcoded German strings: full i18n (next-intl message
  * keys) is CONFIG-03, planned for Phase 14 (Research Open Question 3,
  * RESOLVED).
@@ -52,6 +58,7 @@ function TenderRadarContent() {
       </div>
 
       <CoverageBanner />
+      <SavedSearchBar />
       <FilterPanel />
       <ResultsList />