feat: add duration parameter for QR code generation and local dev setup

[adithya1012]

Description

QR Upload — duration parameter

Demo:
https://youtube.com/shorts/JJxZMVX99Rs

The mobile app requires a duration hint when receiving an upload deeplink. This PR adds duration=180 (seconds) as a query parameter appended to the pulsecam:// deeplink encoded into the upload QR code.

Changes:

• qr.js — Added duration to the /qr/deeplink querystring schema (default 180), appended it to the URLSearchParams before building the deeplink URL, and included it in the JSON response.
• video-actions.ts — Passes &duration=180 when calling the backend /qr/deeplink endpoint from generateUploadQRCode().

Resulting deeplink format:

pulsecam://?mode=upload&server=<url>&token=<token>&draftId=<uuid>&duration=180

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Dev Docker Compose (docker-compose.dev.yml)

The existing docker-compose.yml targets production (Proxmox/LXC) and was missing PostgreSQL entirely. Running it locally caused Redis ECONNREFUSED 127.0.0.1:6379 because REDIS_HOST defaulted to localhost inside the container instead of the Docker service name.

Changes:

• Added docker-compose.dev.yml — a self-contained local development compose file with:
  • PostgreSQL 16 (required by frontend Prisma/Better Auth — was absent from prod compose)
  • Redis 7 with REDIS_HOST: redis explicitly set on backend and worker (fixes the ECONNREFUSED connection error)
  • All service ports exposed locally (5432, 6379, 3000, 3001, 8080, 9090, 3100)
  • DATABASE_URL and BACKEND_URL pre-wired between services
  • Dev-safe placeholder secrets (HMAC_SECRET, BETTER_AUTH_SECRET)

Usage:

docker compose -f docker-compose.dev.yml up --build