ksmithandClaude Sonnet 5 d7e777cbd8 Add inline preview for markdown and plain-text file attachments
Clicking a .md/.txt attachment now opens a modal instead of downloading,
with an explicit download button still available inside it. Markdown
renders through the same XSS-safe renderer used for chat messages;
plain text renders as literal escaped content via <pre>.

No backend change needed: the preview content is read via fetch(), which
is unaffected by the Content-Disposition: attachment header the file-serve
endpoint always sends (that header only steers the browser's own
navigation/embed rendering, not a script-initiated body read) -- so the
existing download-forcing security behavior from #13 stays intact.
Non-previewable types (PDF, etc.) are unchanged.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
2026-08-15 21:30:29 -06:00

DS Chat

A web-based team chat service (Mattermost-style, no threaded conversations), invite-only. See ARCHITECTURE.md for the full system design and phased build plan.

Phase 1: auth, open-room CRUD, and single-instance WebSocket chat, backend

  • a minimal frontend. Phase 2: private rooms, room roles (owner/admin/ member), and room invites — backend only, see below. Later phases (push notifications, Redis fan-out, the admin portal, the bot/extension system, and production deployment) are tracked as issues in the repo's issue tracker, prioritized.

Structure

  • backend/ — FastAPI + SQLAlchemy 2.0 (async) + PostgreSQL. See backend/README.md for local setup, migrations, how to create a user (site registration is invite-only — no public sign-up endpoint), and the Phase 2 room-roles/invites API.
  • frontend/ — React + Vite PWA (login, room list, chat view). Still Phase-1-only: it doesn't yet call any of the Phase 2 endpoints. A UI redesign is happening separately; frontend work resumes once that lands.

Quickstart

# 1. Postgres (see backend/README.md for details)
docker run -d --name ds-chat-postgres \
  -e POSTGRES_USER=ds_chat -e POSTGRES_PASSWORD=ds_chat -e POSTGRES_DB=ds_chat \
  -p 5432:5432 postgres:16-alpine

# 2. Backend
cd backend
python3 -m venv .venv
.venv/bin/pip install -e ".[dev]"
cp .env.example .env   # then set SESSION_SECRET
.venv/bin/alembic upgrade head
.venv/bin/python -m app.cli create-user alice alice@example.com "some-password"
.venv/bin/uvicorn app.main:app --reload &

# 3. Frontend (in another shell)
cd frontend
npm install
npm run dev

Then open http://localhost:5173 and log in with the account created above. The Vite dev server proxies /api and /ws to the backend on :8000, so no CORS configuration is needed in development.

Deployment

See DEPLOYMENT.md for the full production runbook — two Debian 13 servers, no containers, matching ARCHITECTURE.md §9.

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