Fix planner production server + use .ts extensions everywhere

- Fix createRequestHandler → createRequestListener (@react-router/node
  removed the old API)
- Move noEmit + allowImportingTsExtensions to tsconfig.base.json so all
  packages and apps inherit them consistently
- Add explicit .ts extensions to all remaining relative imports across
  packages and apps

Verified locally: node --experimental-strip-types server.ts starts and
responds 200.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

packages/db/src/index.ts

@@ -1,7 +1,7 @@
 import { drizzle } from "drizzle-orm/postgres-js";
 import postgres from "postgres";
-import * as plannerSchema from "./schema/planner";
-import * as journalSchema from "./schema/journal";
+import * as plannerSchema from "./schema/planner.ts";
+import * as journalSchema from "./schema/journal.ts";
 
 export function createDb(connectionString?: string) {
   const client = postgres(