Add Zod validation to all API endpoints and remove debug test route

Adds schema-based input validation across helcim, events, members,
series, admin, and updates API endpoints. Removes the peer-support
debug test endpoint. Adds validation test coverage.

server/api/admin/events/[id].put.js

@@ -7,15 +7,7 @@ export default defineEventHandler(async (event) => {
     await requireAdmin(event)
 
     const eventId = getRouterParam(event, 'id')
-    const body = await readBody(event)
-
-    // Validate required fields
-    if (!body.title || !body.description || !body.startDate || !body.endDate) {
-      throw createError({
-        statusCode: 400,
-        statusMessage: 'Missing required fields'
-      })
-    }
+    const body = await validateBody(event, adminEventUpdateSchema)
 
     await connectDB()
 
@@ -63,7 +55,7 @@ export default defineEventHandler(async (event) => {
     console.error('Error updating event:', error)
     throw createError({
       statusCode: 500,
-      statusMessage: error.message || 'Failed to update event'
+      statusMessage: 'An unexpected error occurred'
     })
   }
 })