fix: Dockerfile ffmpeg-fetch + drop ffprobe + suppress TimeoutNegativeWarning

- ffmpeg-fetch Stage war versehentlich leer (sed-Fehler) - jetzt korrekt
- ffprobe entfernt (wird nirgends benutzt, spart ~200MB)
- TimeoutNegativeWarning aus @discordjs/voice unterdrueckt (Node 24 Kompatibilitaet)

Dockerfile

@@ -6,7 +6,6 @@ WORKDIR /app/web
 COPY web/package*.json ./
 RUN npm install --no-audit --no-fund
 COPY web/ .
-# Umgebungsvariable für React Build verfügbar machen (Vite liest nur VITE_*)
 ARG VITE_BUILD_CHANNEL=stable
 ARG VITE_APP_VERSION=1.1.0
 ENV VITE_BUILD_CHANNEL=$VITE_BUILD_CHANNEL
@@ -21,12 +20,18 @@ COPY server/package*.json ./
 RUN npm install --no-audit --no-fund
 COPY server/ .
 RUN npm run build
-# Nur Prod-Dependencies für Runtime behalten. rm -rf and cleanly install to prevent npm prune bugs
 RUN rm -rf node_modules && npm install --omit=dev --no-audit --no-fund
 
-# --- Static ffmpeg binary (kein apt-get, keine Codec-Libs noetig) ---
+# --- Static ffmpeg binary (nur ffmpeg, kein ffprobe - wird nicht benutzt) ---
 FROM debian:bookworm-slim AS ffmpeg-fetch
-RUN apt-get update && apt-get install -y curl xz-utils ca-certificates && rm -rf /var/lib/apt/lists/*  && curl -L https://github.com/yt-dlp/FFmpeg-Builds/releases/download/latest/ffmpeg-master-latest-linux64-gpl.tar.xz     -o /tmp/ffmpeg.tar.xz  && mkdir -p /tmp/ffmpeg  && tar -xJf /tmp/ffmpeg.tar.xz -C /tmp/ffmpeg --strip-components=2 --wildcards '*/bin/ffmpeg' '*/bin/ffprobe'  && chmod +x /tmp/ffmpeg/ffmpeg /tmp/ffmpeg/ffprobe  && rm /tmp/ffmpeg.tar.xz
+RUN apt-get update && apt-get install -y --no-install-recommends curl xz-utils ca-certificates \
+ && rm -rf /var/lib/apt/lists/* \
+ && curl -L https://github.com/yt-dlp/FFmpeg-Builds/releases/download/latest/ffmpeg-master-latest-linux64-gpl.tar.xz \
+    -o /tmp/ffmpeg.tar.xz \
+ && mkdir -p /tmp/ffmpeg \
+ && tar -xJf /tmp/ffmpeg.tar.xz -C /tmp/ffmpeg --strip-components=2 --wildcards "*/bin/ffmpeg" \
+ && chmod +x /tmp/ffmpeg/ffmpeg \
+ && rm /tmp/ffmpeg.tar.xz
 
 # --- Runtime image ---
 FROM node:24-slim AS runtime
@@ -35,13 +40,12 @@ ENV NODE_ENV=production
 ENV PORT=8080
 ENV SOUNDS_DIR=/data/sounds
 
-# Nur ca-certificates fuer HTTPS + yt-dlp (kein ffmpeg via apt!)
-RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates curl  && curl -L https://github.com/yt-dlp/yt-dlp/releases/latest/download/yt-dlp -o /usr/local/bin/yt-dlp  && chmod a+rx /usr/local/bin/yt-dlp  && apt-get purge -y curl && apt-get autoremove -y && rm -rf /var/lib/apt/lists/*
+RUN apt-get update && apt-get install -y --no-install-recommends ca-certificates curl \
+ && curl -L https://github.com/yt-dlp/yt-dlp/releases/latest/download/yt-dlp -o /usr/local/bin/yt-dlp \
+ && chmod a+rx /usr/local/bin/yt-dlp \
+ && apt-get purge -y curl && apt-get autoremove -y && rm -rf /var/lib/apt/lists/*
 
-# Statische ffmpeg/ffprobe Binaries aus fetch-stage kopieren
 COPY --from=ffmpeg-fetch /tmp/ffmpeg/ffmpeg /usr/local/bin/ffmpeg
-COPY --from=ffmpeg-fetch /tmp/ffmpeg/ffprobe /usr/local/bin/ffprobe
-
 COPY --from=server-build /app/server/dist ./server/dist
 COPY --from=server-build /app/server/node_modules ./server/node_modules
 COPY --from=server-build /app/server/package.json ./server/package.json