Reapply "Add missing admin action files and navigation links"

This reverts commit 4d515bc400.

src/app/api/radio/embed-config/route.ts

@@ -6,12 +6,7 @@ import { prisma } from "@/lib/prisma";
 // flat { key: value } map. None of these keys are secrets.
 export const dynamic = "force-dynamic";
 
-const EMBED_KEYS = [
-  "radio_enabled",
-  "radio_name",
-  "radio_stream_url",
-  "radio_auto_play",
-];
+const EMBED_KEYS = ["radio_enabled", "radio_name", "radio_stream_url", "radio_auto_play"];
 
 export async function GET(_req: Request) {
   try {

src/app/api/radio/listeners/route.ts

@@ -80,9 +80,7 @@ export async function GET(_req: Request) {
     const aborted = e instanceof Error && e.name === "AbortError";
     return apiJson({
       listeners: null,
-      error: aborted
-        ? `Timed out after ${FETCH_TIMEOUT_MS / 1000}s`
-        : "Fetch failed",
+      error: aborted ? `Timed out after ${FETCH_TIMEOUT_MS / 1000}s` : "Fetch failed",
     });
   } finally {
     clearTimeout(timer);

src/app/api/radio/now-playing/route.ts

@@ -44,9 +44,7 @@ export async function GET(_req: Request) {
   } catch (e) {
     const aborted = e instanceof Error && e.name === "AbortError";
     return apiJson({
-      error: aborted
-        ? `Timed out after ${FETCH_TIMEOUT_MS / 1000}s`
-        : "Fetch failed",
+      error: aborted ? `Timed out after ${FETCH_TIMEOUT_MS / 1000}s` : "Fetch failed",
     });
   } finally {
     clearTimeout(timer);