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

@@ -15,7 +15,9 @@ ENV PLAYWRIGHT_BROWSERS_PATH=/opt/hermes/.playwright
 RUN apt-get update && \
     apt-get install -y --no-install-recommends \
         build-essential nodejs npm python3 ripgrep ffmpeg gcc python3-dev libffi-dev procps git openssh-client docker-cli tini \
-        curl poppler-utils imagemagick && \
+        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 && \
     rm -rf /var/lib/apt/lists/*
 
 # Non-root user for runtime; UID can be overridden via HERMES_UID at runtime

env/.env.example.paperclip

@@ -1,26 +0,0 @@
-# Paperclip Environment Variables
-# Copy this file to your .env (at the compose root or docker-compose working directory)
-# and fill in the secrets.
-#
-#   cp env/.env.example.paperclip .env
-#
-# Then reference it from compose.yml:
-#   env_file:
-#     - path: .env
-#       required: true
-
-# ---------------------------------------------------------------------------
-# Database
-# ---------------------------------------------------------------------------
-# PostgreSQL password for the paperclip-db service.
-# Generate a strong random password:
-#   openssl rand -base64 32
-PAPERCLIP_DB_PASSWORD=change_me_to_a_strong_random_password
-
-# ---------------------------------------------------------------------------
-# Authentication
-# ---------------------------------------------------------------------------
-# Secret key used by Better Auth for signing and verifying tokens.
-# Generate a strong random secret:
-#   openssl rand -base64 32
-PAPERCLIP_AUTH_SECRET=change_me_to_a_strong_random_secret