Add Zod validation, fix mass assignment, remove test endpoints and dead code

- Add centralized Zod schemas (server/utils/schemas.js) and validateBody
  utility for all API endpoints
- Fix critical mass assignment in member creation: raw body no longer
  passed to new Member(), only validated fields (email, name, circle,
  contributionTier) are accepted
- Apply Zod validation to login, profile patch, event registration,
  updates, verify-payment, and admin event creation endpoints
- Fix logout cookie flags to match login (httpOnly: true, secure
  conditional on NODE_ENV)
- Delete unauthenticated test/debug endpoints (test-connection,
  test-subscription, test-bot)
- Remove sensitive console.log statements from Helcim and member
  endpoints
- Remove unused bcryptjs dependency
- Add 10MB file size limit on image uploads
- Use runtime config for JWT secret across all endpoints
- Add 38 validation tests (117 total, all passing)

server/api/auth/login.post.js

@@ -3,6 +3,8 @@ import jwt from "jsonwebtoken";
 import { Resend } from "resend";
 import Member from "../../models/member.js";
 import { connectDB } from "../../utils/mongoose.js";
+import { validateBody } from "../../utils/validateBody.js";
+import { emailSchema } from "../../utils/schemas.js";
 
 const resend = new Resend(process.env.RESEND_API_KEY);
 
@@ -10,14 +12,7 @@ export default defineEventHandler(async (event) => {
   // Connect to database
   await connectDB();
 
-  const { email } = await readBody(event);
-
-  if (!email) {
-    throw createError({
-      statusCode: 400,
-      statusMessage: "Email is required",
-    });
-  }
+  const { email } = await validateBody(event, emailSchema);
 
   const GENERIC_MESSAGE = "If this email is registered, we've sent a login link.";
 
@@ -31,10 +26,11 @@ export default defineEventHandler(async (event) => {
     };
   }
 
-  // Generate magic link token
+  // Generate magic link token (use runtime config for consistency with verify/requireAuth)
+  const config = useRuntimeConfig(event);
   const token = jwt.sign(
     { memberId: member._id },
-    process.env.JWT_SECRET,
+    config.jwtSecret,
     { expiresIn: "15m" },
   );