fix: remove manual project creation, smart sequence release, received-invoices schema fix

- Remove ProjectCreate page, POST /projects endpoint, and next-number endpoint
- Projects can only be created through orders (shared numbering sequence)
- Remove dead CreateProjectSchema and createProject service function
- Delete 'order' row from number_sequences (unused; code uses 'shared')
- Smart sequence release: decrement last_number only when deleting the highest number
- Fix received-invoices stats referencing non-existent is_deleted and amount_czk columns
- Update deploy instructions in CLAUDE.md (npm install, prisma migrate deploy)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

CLAUDE.md

@@ -293,10 +293,11 @@ When adding new features, add tests in `src/__tests__/`. Name test files `<featu
 5. Create tarball: `tar -czf app-ts-X.Y.Z.tar.gz dist dist-client prisma package.json package-lock.json scripts`
 6. Deploy via SSH to production server (`boha_admin@192.168.50.100`):
    - Path: `/var/www/app-ts`
-   - Backup: `node_modules`, `.env`, `ecosystem.config.js`
-   - Clean directory (keep backups only)
-   - Extract tarball
-   - Restore backups
-   - Restart: `pm2 reload ecosystem.config.js`
+   - Remove old files: `rm -rf dist dist-client prisma scripts package.json package-lock.json`
+   - Copy tarball to server: `scp app-ts-X.Y.Z.tar.gz boha_admin@192.168.50.100:/tmp/`
+   - Extract tarball: `tar -xzf /tmp/app-ts-X.Y.Z.tar.gz`
+   - Install dependencies: `npm install --omit=dev`
+   - Apply Prisma migrations: `npx prisma migrate deploy`
+   - Restart: `pm2 restart app-ts --update-env`
 
 Do not push directly to production or restart services without confirmation.