fix(portal): prevent /login redirect for client dev users when session.id is null

When a client clicks "Abigail Brooks" in the dev login selector,
POST /api/portal/dev-session returns 201 but the session may not have
id set immediately (timing issue or API response). This caused both
CustomerPortal and Dashboard to redirect to /login because session?.id
was null.

Changes:
- CustomerPortal: don't redirect to /login for client dev users even
  if session is null — the dev-session flow has verified the user
- Dashboard: check for dev user before redirecting when sessionId is null

This ensures client dev users see the portal rather than being
immediately redirected back to /login.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

apps/web/src/portal/sections/Dashboard.tsx

@@ -1,6 +1,7 @@
 import { useState, useEffect } from "react";
 import { Navigate } from "react-router-dom";
 import { Calendar, Clock, PawPrint, CreditCard, Star, ChevronRight, AlertTriangle } from "lucide-react";
+import { getDevUser } from "../pages/DevLoginSelector.js";
 
 interface DashboardProps {
   sessionId: string | null;
@@ -186,7 +187,11 @@ export function Dashboard({
     );
   }
 
-  if (!sessionId && !isImpersonating) {
+  // Don't redirect to /login if we have a dev user — dev sessions may not have
+  // sessionId set immediately after creation (session?.id may be null due to
+  // timing or API response issues). Dev users are stored in localStorage and
+  // verified via the dev-session flow, so they should see the portal.
+  if (!sessionId && !isImpersonating && !getDevUser()) {
     return <Navigate to="/login" replace />;
   }