feat(pitch-deck): passwordless investor auth, audit logs, snapshots & PWA (#2)

Adds investor-facing access controls, persistence, and PWA support to the pitch deck:

- Passwordless magic-link auth (jose JWT + nodemailer SMTP)
- Per-investor audit logging (logins, slide views, assumption changes, chat)
- Financial model snapshot persistence (auto-save/restore per investor)
- PWA support (manifest, service worker, offline caching, branded icons)
- Safeguards: email watermark overlay, security headers, content protection,
  rate limiting, IP/new-IP detection, single active session per investor
- Admin API: invite, list investors, revoke, query audit logs
- pitch-deck service added to docker-compose.coolify.yml

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

pitch-deck/app/api/admin/audit-logs/route.ts

@@ -0,0 +1,42 @@
+import { NextRequest, NextResponse } from 'next/server'
+import pool from '@/lib/db'
+import { validateAdminSecret } from '@/lib/auth'
+
+export async function GET(request: NextRequest) {
+  if (!validateAdminSecret(request)) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 })
+  }
+
+  const { searchParams } = new URL(request.url)
+  const investorId = searchParams.get('investor_id')
+  const action = searchParams.get('action')
+  const limit = Math.min(parseInt(searchParams.get('limit') || '100'), 500)
+  const offset = parseInt(searchParams.get('offset') || '0')
+
+  const conditions: string[] = []
+  const params: unknown[] = []
+  let paramIdx = 1
+
+  if (investorId) {
+    conditions.push(`a.investor_id = $${paramIdx++}`)
+    params.push(investorId)
+  }
+  if (action) {
+    conditions.push(`a.action = $${paramIdx++}`)
+    params.push(action)
+  }
+
+  const where = conditions.length > 0 ? `WHERE ${conditions.join(' AND ')}` : ''
+
+  const { rows } = await pool.query(
+    `SELECT a.*, i.email as investor_email, i.name as investor_name
+     FROM pitch_audit_logs a
+     LEFT JOIN pitch_investors i ON i.id = a.investor_id
+     ${where}
+     ORDER BY a.created_at DESC
+     LIMIT $${paramIdx++} OFFSET $${paramIdx++}`,
+    [...params, limit, offset]
+  )
+
+  return NextResponse.json({ logs: rows })
+}