Implement Workstream F1: me.get and me.setupProfile procedures

- Add me.get procedure returning user profile with needsSetup flag
- Add me.setupProfile procedure for initial profile setup after signup
- Add nonEmptyString/optionalString schema helpers with tests
- Use Web Crypto API (SubtleCrypto) for Cloudflare Workers compatibility
- Use @formatjs/intl-durationformat for duration formatting
- Remove node:crypto dependency from crypto utilities

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/api-server/src/utils/crypto.ts

@@ -1,11 +1,16 @@
-import { createHash, randomBytes } from "node:crypto";
-
 /**
  * Hash a token with SHA-256 for storage in database
  * Never store raw tokens - always hash first
+ * Uses Web Crypto API for Cloudflare Workers compatibility
  */
-export const hashToken = (token: string): string => {
-  return createHash("sha256").update(token).digest("hex");
+export const hashToken = async (token: string): Promise<string> => {
+  const encoder = new TextEncoder();
+  const data = encoder.encode(token);
+  const hashBuffer = await crypto.subtle.digest("SHA-256", data);
+  const hashArray = new Uint8Array(hashBuffer);
+  return Array.from(hashArray)
+    .map((b) => b.toString(16).padStart(2, "0"))
+    .join("");
 };
 
 /**
@@ -25,9 +30,14 @@ export const generateDeviceFingerprint = (): string => {
 /**
  * Generate a secure random token for email verification, password reset, etc.
  * Uses 32 bytes (256 bits) of entropy
+ * Uses Web Crypto API for Cloudflare Workers compatibility
  */
 export const generateSecureToken = (): string => {
-  return randomBytes(32).toString("hex");
+  const bytes = new Uint8Array(32);
+  crypto.getRandomValues(bytes);
+  return Array.from(bytes)
+    .map((b) => b.toString(16).padStart(2, "0"))
+    .join("");
 };
 
 /**