Implement OWASP ASVS L1 security remediation (Phases 0-2)

Auth: Add requireAuth/requireAdmin guards with JWT cookie verification,
member status checks (suspended/cancelled = 403), and admin role
enforcement. Apply to all admin, upload, and payment endpoints. Add
role field to Member model.

CSRF: Double-submit cookie middleware with client plugin. Exempt
webhook and magic-link verify routes.

Headers: X-Content-Type-Options, X-Frame-Options, X-XSS-Protection,
Referrer-Policy, Permissions-Policy on all responses. HSTS and CSP
(Helcim/Cloudinary/Plausible sources) in production only.

Rate limiting: Auth 5/5min, payment 10/min, upload 10/min, general
100/min via rate-limiter-flexible, keyed by client IP.

XSS: DOMPurify sanitization on marked() output with tag/attr
allowlists. escapeHtml() utility for email template interpolation.

Anti-enumeration: Login returns identical response for existing and
non-existing emails. Remove 404 handling from login UI components.

Mass assignment: Remove helcimCustomerId from profile allowedFields.

Session: 7-day token expiry, refresh endpoint, httpOnly+secure cookies.

Environment: Validate required secrets on startup via server plugin.
Remove JWT_SECRET hardcoded fallback.

server/api/admin/dashboard.get.js

@@ -1,26 +1,13 @@
 import Member from '../../models/member.js'
 import Event from '../../models/event.js'
 import { connectDB } from '../../utils/mongoose.js'
-import jwt from 'jsonwebtoken'
+import { requireAdmin } from '../../utils/auth.js'
 
 export default defineEventHandler(async (event) => {
   try {
-    // TODO: Temporarily disabled auth for testing - enable when authentication is set up
-    // Basic auth check
-    // const token = getCookie(event, 'auth-token') || getHeader(event, 'authorization')?.replace('Bearer ', '')
-    
-    // if (!token) {
-    //   throw createError({
-    //     statusCode: 401,
-    //     statusMessage: 'Authentication required'
-    //   })
-    // }
-
-    // const config = useRuntimeConfig()
-    // jwt.verify(token, config.jwtSecret)
-
+    await requireAdmin(event)
     await connectDB()
-    
+
     // Get stats
     const totalMembers = await Member.countDocuments()
     const now = new Date()
@@ -28,21 +15,21 @@ export default defineEventHandler(async (event) => {
       startDate: { $lte: now },
       endDate: { $gte: now }
     })
-    
+
     // Calculate monthly revenue from member contributions
     const members = await Member.find({}, 'contributionTier').lean()
     const monthlyRevenue = members.reduce((total, member) => {
       return total + parseInt(member.contributionTier || '0')
     }, 0)
-    
+
     const pendingSlackInvites = await Member.countDocuments({ slackInvited: false })
-    
+
     // Get recent members (last 5)
     const recentMembers = await Member.find()
       .sort({ createdAt: -1 })
       .limit(5)
       .lean()
-    
+
     // Get upcoming events (next 5)
     const upcomingEvents = await Event.find({
       startDate: { $gte: now }
@@ -50,7 +37,7 @@ export default defineEventHandler(async (event) => {
       .sort({ startDate: 1 })
       .limit(5)
       .lean()
-    
+
     return {
       stats: {
         totalMembers,
@@ -62,9 +49,10 @@ export default defineEventHandler(async (event) => {
       upcomingEvents
     }
   } catch (error) {
+    if (error.statusCode) throw error
     throw createError({
       statusCode: 500,
       statusMessage: 'Failed to fetch dashboard data'
     })
   }
-})
+})