chore: remove vibe-coding artifacts from tracking, sync notes and obsidian config

- Untrack .claude/launch.json (Claude Code config)
- Add .claude/, .mcp.json, CLAUDE.md, and AI-generated CSVs to .gitignore
- Add _notes/ vault (architecture, API, tasks, bugs, infra docs)
- Add .obsidian/ plugin/vault config (workspace state excluded)
- Sync CHANGELOG.md

_notes/09 - Projects/App - Web Frontend.md

@@ -0,0 +1,51 @@
+# App — Web Frontend (app.eventifyplus.com)
+
+**Domain:** `app.eventifyplus.com` (currently `mvnew.eventifyplus.com`)
+**Local Path:** `/Users/bshtechnologies/Documents/mvnew.eventifyplus.com new/`
+**Deployment:** Vercel
+
+---
+
+## Tech Stack
+
+| Layer | Technology |
+|-------|-----------|
+| Framework | React 18.2 + Vite 5.1 |
+| Language | TypeScript |
+| Styling | Tailwind CSS 3.4 |
+| Animation | Framer Motion 12 |
+| Deployment | Vercel (`vercel.json`) |
+
+## Architecture
+
+Micro-app injection pattern with separate build configs per module:
+
+| Module | Build Command |
+|--------|---------------|
+| Leaderboard | `build:leaderboard` |
+| Contributor | `build:contributor` |
+| Achievements | `build:achievements` |
+| Reviews | `build:reviews` |
+
+## Server (embedded Express)
+
+- Path: `server/` within the project
+- Stack: Node.js / Express + PostgreSQL (`pg` driver)
+- Port: 3000
+- Has seed data (`server/seed.js`)
+
+## Environment
+- API: `https://uat.eventifyplus.com/api/` (UAT)
+- API: `https://prod.eventifyplus.com/api` (Production)
+
+## Key Features
+- Event discovery & browsing
+- Community contribution & gamification (EP, RP, leaderboard, achievements)
+- User profiles & reviews
+
+## Notes
+
+## Related
+- [[Backend - Django]]
+- [[Mobile - Flutter]]
+- [[Admin - Command Center]]