fix: Playwright chromium deps for Debian trixie (ttf-unifont removed)

Dockerfile

@@ -3,8 +3,14 @@
 FROM python:3.11-slim
 
 # System deps: curl (health checks), git (optional tooling), ffmpeg (voice Phase 5)
+# Playwright chromium deps installed explicitly — --with-deps breaks on Debian trixie
+# (ttf-unifont + ttf-ubuntu-font-family removed from trixie repos)
 RUN apt-get update && apt-get install -y --no-install-recommends \
-    curl git ffmpeg && \
+    curl git ffmpeg \
+    libnss3 libnspr4 libatk1.0-0 libatk-bridge2.0-0 libcups2 \
+    libdrm2 libxkbcommon0 libxcomposite1 libxdamage1 libxfixes3 \
+    libxrandr2 libgbm1 libasound2t64 libpango-1.0-0 libcairo2 \
+    fonts-liberation fonts-unifont && \
     rm -rf /var/lib/apt/lists/*
 
 WORKDIR /app
@@ -13,8 +19,8 @@ WORKDIR /app
 COPY requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt
 
-# Install Playwright browsers (headless Chromium for browser_fetch)
-RUN playwright install chromium --with-deps
+# Install Playwright Chromium binary only (no --with-deps, system deps above)
+RUN playwright install chromium
 
 # Copy source
 COPY . .