fix: run seed.ts before E2E tests to create test users and sessions

Without seeding, loginAsUser/loginAsAdmin cookies are invalid and
all tests redirect to /login.

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

scripts/run-e2e-tests.sh

@@ -50,11 +50,14 @@ for i in $(seq 1 60); do
     sleep 2
 done
 
-echo "=== Installing Playwright dependencies ==="
+echo "=== Installing dependencies ==="
 cd "$E2E_DIR"
 npm install --silent
 npx playwright install chromium --with-deps 2>/dev/null || npx playwright install chromium
 
+echo "=== Seeding test database ==="
+npx tsx seed.ts
+
 echo "=== Running E2E tests ==="
 npx playwright test "$@"