Fix: Remove broken getKlausurApiUrl and clean up empty lines

sed replacement left orphaned hostname references in story page
and empty lines in getApiBase functions.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

admin-lehrer/app/(admin)/ai/test-quality/_components/index.ts

@@ -0,0 +1,12 @@
+export { ToastContainer } from './ToastContainer'
+export { MetricCard } from './MetricCard'
+export { TestSuiteCard } from './TestSuiteCard'
+export { TrendChart } from './TrendChart'
+export { TestRunsTable } from './TestRunsTable'
+export { IntentScoresChart } from './IntentScoresChart'
+export { FailedTestsList } from './FailedTestsList'
+export { GuideTab } from './GuideTab'
+export { OverviewTab } from './OverviewTab'
+export { GoldenTab } from './GoldenTab'
+export { RagTab } from './RagTab'
+export { SyntheticTab } from './SyntheticTab'