Migrate to Chromium, unified VNC, thumbnails, autologin CDP detection

---

- Migrado base Docker de ubuntu:22.04 + Google Chrome para debian:bookworm-slim + Chromium
- Dockerfile refatorado com multi-stage build (node:22-alpine builder + debian runtime) e single RUN layer para imagem menor
- VNC unificado: removido novnc por stream, substituído por websockify global na porta 6080 com token-based routing
- Implementado sistema de thumbnails por stream via ffmpeg (captura do HLS) com endpoint GET/POST e atualização no card
- Autologin reescrito com detecção via Chrome DevTools Protocol: pula credenciais se já autenticado
- Adicionado padrão desiredState (running/stopped) persistido no JSON, restaurado via restore-streams.sh ao reiniciar container
- UI traduzida para inglês, formulário reorganizado com tooltips, seção avançada colapsável e GOP automático
- Player simplificado: modos HLS e HTML unificados, removido modo m3u8 separado
- Adicionado campo threads no ffmpeg; suporte a seccomp:unconfined no docker-compose

---

scripts/stream.template.conf

@@ -8,29 +8,32 @@ priority=10
 stdout_logfile=/app/data/streams/{{STREAM_ID}}/xvfb.log
 stderr_logfile=/app/data/streams/{{STREAM_ID}}/xvfb.log
 
-[program:chrome-{{STREAM_ID}}]
-command=bash -c "rm -rf /app/data/streams/{{STREAM_ID}}/chrome-profile/Singleton* && google-chrome \
+[program:chromium-{{STREAM_ID}}]
+command=bash -c "rm -rf \
+    /app/data/streams/{{STREAM_ID}}/chrome-profile/Singleton* \
+    /app/data/streams/{{STREAM_ID}}/chrome-profile/.org.chromium.* \
+    '/app/data/streams/{{STREAM_ID}}/chrome-profile/Default/Crash Reports' \
+    /app/data/streams/{{STREAM_ID}}/chrome-profile/Default/.org.chromium.* \
+  && chromium \
     --no-sandbox \
-    --disable-gpu \
-    --window-size={{RESOLUTION}} \
-    --start-maximized \
-    --user-data-dir=/app/data/streams/{{STREAM_ID}}/chrome-profile \
     --test-type \
-    --disable-infobars \
+    --disable-gpu \
+    --window-size={{CHROME_SIZE}} \
+    --start-fullscreen \
+    --user-data-dir=/app/data/streams/{{STREAM_ID}}/chrome-profile \
     --no-first-run \
     --disable-extensions \
     --disable-background-networking \
     --disable-sync \
-    --disable-translate \
     --disable-background-timer-throttling \
     --remote-debugging-port={{DEBUG_PORT}} \
-    "{{STREAM_URL}}""
+    '{{STREAM_URL}}'"
 environment=DISPLAY={{DISPLAY}}
 autorestart=true
 priority=20
 startsecs=5
-stdout_logfile=/app/data/streams/{{STREAM_ID}}/chrome.log
-stderr_logfile=/app/data/streams/{{STREAM_ID}}/chrome.log
+stdout_logfile=/app/data/streams/{{STREAM_ID}}/chromium.log
+stderr_logfile=/app/data/streams/{{STREAM_ID}}/chromium.log
 
 [program:autologin-{{STREAM_ID}}]
 command=/app/data/streams/{{STREAM_ID}}/autologin.sh
@@ -43,22 +46,16 @@ stderr_logfile=/app/data/streams/{{STREAM_ID}}/autologin.log
 
 [program:x11vnc-{{STREAM_ID}}]
 environment=DISPLAY={{DISPLAY}}
-command=bash -c "while [ ! -e /tmp/.X11-unix/X$(echo $DISPLAY | cut -d: -f2 | cut -d. -f1) ]; do sleep 0.2; done; exec x11vnc -nopw -listen 0.0.0.0 -rfbport {{VNC_PORT}} -xkb -forever -shared"
+command=bash -c "while [ ! -e /tmp/.X11-unix/X$(echo $DISPLAY | cut -d: -f2 | cut -d. -f1) ]; do sleep 0.2; done; exec x11vnc -nopw -listen 0.0.0.0 -rfbport {{VNC_PORT}} -xkb -forever -shared -threads"
 autorestart=true
 priority=40
 stdout_logfile=/app/data/streams/{{STREAM_ID}}/vnc.log
 stderr_logfile=/app/data/streams/{{STREAM_ID}}/vnc.log
 
-[program:novnc-{{STREAM_ID}}]
-command=websockify --web /usr/share/novnc {{NOVNC_PORT}} localhost:{{VNC_PORT}}
-autorestart=true
-priority=50
-stdout_logfile=/app/data/streams/{{STREAM_ID}}/novnc.log
-stderr_logfile=/app/data/streams/{{STREAM_ID}}/novnc.log
-
 [program:ffmpeg-{{STREAM_ID}}]
 command=bash -c "sleep {{STREAM_DELAY}} && ffmpeg \
     -loglevel warning \
+    -threads {{THREADS}} \
     -f x11grab \
     -video_size {{RESOLUTION}} \
     -framerate {{FPS}} \