fix: poll hatasına zaman damgası ekle + STT'yi panelden kapatılabilir yap

- lastPollErrors artık {message, at} tutuyor — panelde hangi hatanın ne
  zaman oluştuğu görünmüyordu, eski/güncel ayrımı yapılamıyordu.
- "This live event will begin in N minutes" gibi zararsız mesajlar da
  hata rozetine düşüyordu, "is not currently live" ile aynı gruba alındı.
- Yeni stt_enabled ayarı (Ayarlar sayfası): kapatılınca stt_scoring.py
  OpenAI Whisper çağrısı yapmadan adayı PENDING_STT'de bırakıp çıkıyor —
  konuşmasız/ambiyans yayınlarda (bkz. NASA testi) boşa API maliyeti
  önleniyor.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/frontend/app/actions.ts

@@ -136,6 +136,16 @@ export async function updateSystemSettings(formData: FormData) {
   revalidatePath("/settings");
 }
 
+export async function updateSttEnabled(formData: FormData) {
+  const enabled = formData.get("sttEnabled") === "on";
+  await prisma.appSetting.upsert({
+    where: { key: "stt_enabled" },
+    create: { key: "stt_enabled", value: String(enabled) },
+    update: { value: String(enabled) },
+  });
+  revalidatePath("/settings");
+}
+
 export async function updateNotificationPrefs(formData: FormData) {
   const streamStart = formData.get("notifyStreamStart") === "on";
   const renderDone = formData.get("notifyRenderDone") === "on";

apps/frontend/app/channels/[id]/page.tsx

@@ -122,11 +122,16 @@ export default async function ChannelDetailPage({ params }: { params: Promise<{
 
           {status?.lastPollError && (
             <div className="flex flex-col gap-1.5">
-              <Badge variant="err" className="w-fit">
-                son poll hatası
-              </Badge>
+              <div className="flex items-center gap-2">
+                <Badge variant="err" className="w-fit">
+                  son poll hatası
+                </Badge>
+                <span className="font-mono-num text-xs text-muted-foreground">
+                  {new Date(status.lastPollError.at).toLocaleString("tr-TR")}
+                </span>
+              </div>
               <pre className="font-mono-num whitespace-pre-wrap rounded-md border border-border bg-background/60 p-3 text-[0.7rem] text-muted-foreground">
-                {status.lastPollError}
+                {status.lastPollError.message}
               </pre>
             </div>
           )}

apps/frontend/app/page.tsx

@@ -91,7 +91,14 @@ export default async function DashboardPage() {
                       <TableCell>
                         <div className="flex items-center gap-1.5">
                           <Badge variant={recording ? "live" : "muted"}>{recording ? "🔴 Kayıtta" : "—"}</Badge>
-                          {status?.lastPollError && <Badge variant="err">hata</Badge>}
+                          {status?.lastPollError && (
+                            <Badge
+                              variant="err"
+                              title={`${new Date(status.lastPollError.at).toLocaleString("tr-TR")} — ${status.lastPollError.message}`}
+                            >
+                              hata
+                            </Badge>
+                          )}
                         </div>
                       </TableCell>
                       <TableCell className="font-mono-num text-xs text-muted-foreground">

apps/frontend/app/settings/page.tsx

@@ -1,5 +1,5 @@
 import { prisma } from "@streamclipper/db";
-import { updateYtdlpCookies, updateSystemSettings, updateNotificationPrefs } from "../actions";
+import { updateYtdlpCookies, updateSystemSettings, updateNotificationPrefs, updateSttEnabled } from "../actions";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
 import { Label } from "@/components/ui/label";
@@ -13,12 +13,13 @@ export const dynamic = "force-dynamic";
 const STALE_COOKIE_HOURS = 4;
 
 export default async function SettingsPage() {
-  const [setting, pollSetting, ttlSetting, notifyStart, notifyRender] = await Promise.all([
+  const [setting, pollSetting, ttlSetting, notifyStart, notifyRender, sttSetting] = await Promise.all([
     prisma.appSetting.findUnique({ where: { key: "ytdlp_cookies" } }),
     prisma.appSetting.findUnique({ where: { key: "poll_interval_ms" } }),
     prisma.appSetting.findUnique({ where: { key: "raw_segment_ttl_hours" } }),
     prisma.appSetting.findUnique({ where: { key: "notify_stream_start" } }),
     prisma.appSetting.findUnique({ where: { key: "notify_render_done" } }),
+    prisma.appSetting.findUnique({ where: { key: "stt_enabled" } }),
   ]);
 
   const cookieAgeHours = setting ? (Date.now() - setting.updatedAt.getTime()) / 3_600_000 : null;
@@ -27,6 +28,7 @@ export default async function SettingsPage() {
   const ttlHours = ttlSetting ? Number(ttlSetting.value) : 24;
   const notifyStreamStart = notifyStart?.value !== "false";
   const notifyRenderDone = notifyRender?.value !== "false";
+  const sttEnabled = sttSetting?.value !== "false";
 
   return (
     <div className="flex flex-col gap-6">
@@ -95,6 +97,28 @@ export default async function SettingsPage() {
         </CardContent>
       </Card>
 
+      <Card>
+        <CardHeader>
+          <CardTitle className="text-sm font-medium text-muted-foreground">STT (Transkripsiyon)</CardTitle>
+          <CardDescription>
+            Kapatırsan yeni aday klipler transkribe edilmez (PENDING_STT&apos;de bekler) — OpenAI Whisper çağrısı
+            yapılmaz, render de tetiklenmez. Boş/konuşmasız yayınlarda (ör. sadece ambiyans müzik) gereksiz API
+            maliyetini önlemek için kapatabilirsin.
+          </CardDescription>
+        </CardHeader>
+        <form action={updateSttEnabled}>
+          <CardContent>
+            <Label className="flex items-center justify-between gap-4 text-sm font-normal">
+              Otomatik transkripsiyon aktif
+              <Switch name="sttEnabled" defaultChecked={sttEnabled} />
+            </Label>
+          </CardContent>
+          <CardFooter>
+            <Button type="submit">Kaydet</Button>
+          </CardFooter>
+        </form>
+      </Card>
+
       <Card>
         <CardHeader>
           <CardTitle className="text-sm font-medium text-muted-foreground">Bildirimler</CardTitle>

apps/frontend/lib/apiDaemon.ts

@@ -5,7 +5,7 @@ export interface ChannelStatus {
   lastCheckedAt: string | null;
   recording: boolean;
   activeSessionId: string | null;
-  lastPollError: string | null;
+  lastPollError: { message: string; at: string } | null;
 }
 
 export const API_DAEMON_URL = process.env.API_DAEMON_URL ?? "http://localhost:4001";