feat(types): add User type and App.Locals

Define App.Locals.user interface for session user data.
Add User type to shared types (mirrors DB columns minus passwordHash).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/app.d.ts

@@ -3,7 +3,14 @@
 declare global {
 	namespace App {
 		// interface Error {}
-		// interface Locals {}
+		interface Locals {
+			user: {
+				id: number;
+				email: string;
+				displayName: string;
+				role: 'admin' | 'user';
+			} | null;
+		}
 		// interface PageData {}
 		// interface PageState {}
 		// interface Platform {}

src/lib/types/index.ts

@@ -52,6 +52,16 @@ export interface Tag {
 	name: string;
 }
 
+export interface User {
+	id: number;
+	email: string;
+	displayName: string;
+	role: 'admin' | 'user';
+	authProvider: string;
+	providerId: string | null;
+	createdAt: Date;
+}
+
 export interface SyncChange {
 	noteId: string;
 	operation: 'create' | 'update' | 'delete';