Address final review nits: log fetch errors and guard scheduledAt match

Two small polish items from the regression-risk review:

- ImprintPage / PrivacyPage: the prior .catch silently swallowed every
  rejection. Now we ignore AbortError (intentional unmount cleanup) and
  log other failures via console.warn so dev/operators still see real
  network or sanitization problems.
- ReplacePresentationModal: when picking the newly-created presentation
  from the response, the previous logic fell back to comparing
  p.scheduledAt === null when the form's date was missing — which would
  spuriously match an unrelated record with a null scheduledAt. The
  form already validates date as required so this was practically
  unreachable, but the new code guards explicitly: no match when no
  date was submitted.

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

Author: krusche

client/src/components/PresentationsTable/components/ReplacePresentationModal/ReplacePresentationModal.tsx

@@ -126,16 +126,18 @@ const ReplacePresentationModal = (props: IReplacePresentationModalProps) => {
         onClose()
 
         // Find the updated or newly created presentation
+        const targetScheduledAt =
+          form.values.date instanceof Date
+            ? form.values.date.toISOString()
+            : form.values.date
+              ? new Date(form.values.date).toISOString()
+              : undefined
         const updatedPresentation = response.data.presentations?.find((p) =>
           presentation
             ? p.presentationId === presentation.presentationId
-            : // For new presentation, pick the one with the latest scheduledAt
-              p.scheduledAt ===
-              (form.values.date instanceof Date
-                ? form.values.date.toISOString()
-                : form.values.date
-                  ? new Date(form.values.date).toISOString()
-                  : null),
+            : // For new presentation, match by the freshly-submitted scheduledAt.
+              // Guard against picking a record with scheduledAt === null when the form date is missing.
+              targetScheduledAt !== undefined && p.scheduledAt === targetScheduledAt,
         )
 
         onChange?.(updatedPresentation)

client/src/pages/ImprintPage/ImprintPage.tsx

@@ -13,8 +13,9 @@ const ImprintPage = () => {
     fetch('/imprint.html', { signal: controller.signal })
       .then((res) => res.text())
       .then((res) => setContent(res))
-      .catch(() => {
-        /* aborted or failed; leave content empty */
+      .catch((err: unknown) => {
+        if (err instanceof Error && err.name === 'AbortError') return
+        console.warn('Failed to load imprint content', err)
       })
     return () => controller.abort()
   }, [])

client/src/pages/PrivacyPage/PrivacyPage.tsx

@@ -16,8 +16,9 @@ const PrivacyPage = () => {
     fetch('/privacy.html', { signal: controller.signal })
       .then((res) => res.text())
       .then((res) => setContent(res))
-      .catch(() => {
-        /* aborted or failed; leave content empty */
+      .catch((err: unknown) => {
+        if (err instanceof Error && err.name === 'AbortError') return
+        console.warn('Failed to load privacy content', err)
       })
     return () => controller.abort()
   }, [])