Extract emails into separate package with clean interface

- Create packages/emails/ with EmailClient interface abstraction
- Wrap Postmark ServerClient in adapter for clean typing
- Add createLoggingEmailClient for dev mode (logs to console)
- Split email templates into individual files with full test coverage
- Update api-server to use new package via context injection
- Remove EMAIL_DEV_MODE - now uses POSTMARK_API_KEY presence
- Delete apps/api-server/src/utils/email.ts

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

apps/api-server/src/index.ts

@@ -2,10 +2,17 @@ import type { APIContext } from "./context.js";
 import { LoggingHandlerPlugin } from "@orpc/experimental-pino";
 import { RPCHandler } from "@orpc/server/fetch";
 import { createDb } from "@reviq/db";
+import {
+  createLoggingEmailClient,
+  createPostmarkClient,
+} from "@reviq/emails";
 import pino from "pino";
 import {
+  BASE_URL,
   DEFAULT_PORT,
   DEFAULT_RP_NAME,
+  EMAIL_FROM,
+  POSTMARK_API_KEY,
   getAllowedOrigins,
 } from "./constants.js";
 import { router } from "./router.js";
@@ -24,6 +31,16 @@ if (!databaseUrl) {
   throw new Error("DATABASE_URL environment variable is required");
 }
 const db = createDb(databaseUrl);
+
+// Create email client - use Postmark if API key is set, otherwise log to console
+const emailClient = POSTMARK_API_KEY
+  ? createPostmarkClient(POSTMARK_API_KEY)
+  : createLoggingEmailClient();
+
+if (!POSTMARK_API_KEY) {
+  logger.info("POSTMARK_API_KEY not set - emails will be logged to console");
+}
+
 const handler = new RPCHandler(router, {
   plugins: [
     new LoggingHandlerPlugin({
@@ -62,6 +79,11 @@ Bun.serve({
         reqHeaders: request.headers,
         resHeaders,
         clientIP,
+        email: {
+          client: emailClient,
+          fromAddress: EMAIL_FROM,
+          baseUrl: BASE_URL,
+        },
       };
 
       const { response } = await handler.handle(request, {