Gate /chat/* behind Forgejo OAuth2 authorization-code flow.
- Extract generic _create_forgejo_oauth_app() helper in lib/ci-setup.sh;
Woodpecker OAuth becomes a thin wrapper, chat gets its own app.
- bin/disinto init now creates TWO OAuth apps (woodpecker-ci + disinto-chat)
and writes CHAT_OAUTH_CLIENT_ID / CHAT_OAUTH_CLIENT_SECRET to .env.
- docker/chat/server.py: new routes /chat/login (→ Forgejo authorize),
/chat/oauth/callback (code→token exchange, user allowlist check, session
cookie). All other /chat/* routes require a valid session or redirect to
/chat/login. Session store is in-memory with 24h TTL.
- lib/generators.sh: pass FORGE_URL, CHAT_OAUTH_CLIENT_ID,
CHAT_OAUTH_CLIENT_SECRET, EDGE_TUNNEL_FQDN, DISINTO_CHAT_ALLOWED_USERS
to the chat container environment.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
