fix: restore playwright --with-deps to install missing libXfixes

Dockerfile

@@ -35,8 +35,8 @@ RUN pip install --no-cache-dir -r requirements.txt
 # Set browser path BEFORE install so Playwright puts browsers here
 ENV PLAYWRIGHT_BROWSERS_PATH=/ms-playwright
 
-# Install Playwright Chromium browser only (system deps already installed above)
-RUN playwright install chromium
+# Install Playwright Chromium browser + all required system deps
+RUN playwright install --with-deps chromium
 
 # Copy application code
 COPY app/ ./app/