refactor(hooks): populate event.locals.user from session

validateSession now returns user data. Middleware sets event.locals.user
on every authenticated request. Add /api/auth/oauth to public paths.

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

src/hooks.server.ts

@@ -2,11 +2,20 @@ import type { Handle } from '@sveltejs/kit';
 import { redirect } from '@sveltejs/kit';
 import { validateSession, isSetupComplete } from '$lib/server/auth.js';
 
-const PUBLIC_PATHS = ['/login', '/setup', '/api/auth/login', '/api/auth/setup'];
+const PUBLIC_PATHS = [
+	'/login',
+	'/setup',
+	'/api/auth/login',
+	'/api/auth/setup',
+	'/api/auth/oauth'
+];
 
 export const handle: Handle = async ({ event, resolve }) => {
 	const { pathname } = event.url;
 
+	// Initialize locals
+	event.locals.user = null;
+
 	// Allow public paths
 	if (PUBLIC_PATHS.some((p) => pathname.startsWith(p))) {
 		return resolve(event);
@@ -21,9 +30,16 @@ export const handle: Handle = async ({ event, resolve }) => {
 		return resolve(event);
 	}
 
-	// Validate session
+	// Validate session and populate user
 	const sessionToken = event.cookies.get('session');
-	if (!sessionToken || !(await validateSession(sessionToken))) {
+	if (sessionToken) {
+		const result = await validateSession(sessionToken);
+		if (result.valid && result.user) {
+			event.locals.user = result.user;
+		}
+	}
+
+	if (!event.locals.user) {
 		if (pathname.startsWith('/api/')) {
 			return new Response(JSON.stringify({ error: 'Unauthorized' }), {
 				status: 401,