feat(ai): add chromium browser automation support (PR 2/5)

Add browser automation packages for Playwright/headless Chrome:
- chromium: Headless browser
- xvfb: Virtual framebuffer for headless operation
- fonts-*: Font support for proper rendering
- lib*-runtime: Chromium runtime dependencies

Depends on PR #7 (curl, poppler-utils, imagemagick)

ai/Dockerfile

@@ -17,8 +17,7 @@ RUN apt-get update && \
         build-essential nodejs npm python3 ripgrep ffmpeg gcc python3-dev libffi-dev procps git openssh-client docker-cli tini \
         curl poppler-utils imagemagick \
         chromium xvfb fonts-noto-color-emoji fonts-unifont fonts-liberation fonts-ipafont-gothic fonts-wqy-zenhei fonts-tlwg-loma-otf fonts-freefont-ttf \
-        libasound2t64 libatk-bridge2.0-0t64 libatk1.0-0t64 libatspi2.0-0t64 libcairo2 libcups2t64 libdbus-1-3 libdrm2 libgbm1 libglib2.0-0t64 libnspr4 libnss3 libpango-1.0-0 libx11-6 libxcb1 libxcomposite1 libxdamage1 libxext6 libxfixes3 libxkbcommon0 libxrandr2 \
-        texlive-latex-base texlive-latex-extra texlive-fonts-recommended texlive-xetex texlive-science && \
+        libasound2t64 libatk-bridge2.0-0t64 libatk1.0-0t64 libatspi2.0-0t64 libcairo2 libcups2t64 libdbus-1-3 libdrm2 libgbm1 libglib2.0-0t64 libnspr4 libnss3 libpango-1.0-0 libx11-6 libxcb1 libxcomposite1 libxdamage1 libxext6 libxfixes3 libxkbcommon0 libxrandr2 && \
     rm -rf /var/lib/apt/lists/*
 
 # Non-root user for runtime; UID can be overridden via HERMES_UID at runtime