Extend and fix session management, /me API

packages/common/src/db.ts

@@ -2,6 +2,12 @@ import { Schema as S } from "@effect/schema";
 import { AttachmentId, BooleanFromNumber, PieceId, RequestId, SessionId, Sha256, UserId } from "common";
 import { Brand as B, pipe } from "effect";
 
+export const SessionData = S.Struct({
+	userId: UserId,
+});
+
+export type SessionData = typeof SessionData.Type;
+
 export const SystemInformation = S.Struct({
 	createdBy: S.Union(UserId, S.Null),
 	createdAt: S.DateTimeUtc,
@@ -47,11 +53,13 @@ export const Piece = pipe(
 	S.extend(SystemInformation),
 );
 
-export const Session = S.Struct({
-	sessionId: SessionId,
-	userId: UserId,
-	expiresAt: S.DateTimeUtc,
-});
+export const Session = pipe(
+	S.Struct({
+		sessionId: SessionId,
+		expiresAt: S.DateTimeUtc,
+	}),
+	S.extend(SessionData),
+);
 
 export const User = S.Struct({
 	userId: UserId,