Phase 2 - AI Content Pipeline & Social Management:

== Backend Modules ==
- common/notification/: Notification engine (in-app, email, webhook, Slack, HMAC-signed)
- common/social/approval_gate.py: Editorial state machine (draft -> review -> approved -> published)
- common/social/post_queue.py: Post queue + calendar slot scheduling
- common/social/scheduler.py: Background publish engine (parallel, exponential backoff)
- common/media/image_processor.py: Media processor (Pillow resize, ffmpeg thumbnails)
- common/content_templates.py: 30+ fashion content templates + Vietnamese RSS feeds (ported from BrightBean builtin_templates.py 968L)

== API Routes ==
- api/notification_route.py: Notification CRUD + test endpoints
- api/content_approval_route.py: Approval workflow (approve/reject/submit)
- api/queue_route.py: Queue + calendar + posting slots
- api/media_route.py: Media library (upload/resize/delete)
- api/templates_route.py: Content templates + RSS feed catalog
- api/social_inbox_route.py: Unified social inbox (FB/IG/TikTok messages)

== Static Dashboards (zero-build) ==
- static/content-approval/index.html: Approval queue UI
- static/content-calendar/index.html: Weekly calendar + queue sidebar
- static/media-library/index.html: Drag-drop upload + asset grid + platform resize
- static/social-inbox/index.html: 3-column inbox (filters/list/detail) + reply/note composer
- static/content-composer/index.html: Post editor + templates + AI enhancement + schedule

== Server ==
- server.py: Registered all new routers + publish engine autostart + dashboard links in banner