e2e: run.sh keeps playwright arg passthrough with the default project set

The default-project-set rewrite dropped non---project args (e.g. --list),
so 'run.sh --list' silently RAN the whole suite instead of listing.
Args now ride alongside the default set; an explicit --project still
takes over. Verified: default --list = 33 tests listed; opt-in --list =
34 with the frankbook walk.

tests/e2e/run.sh

@@ -31,8 +31,9 @@ fi
 npx playwright install chromium
 
 # Default project set; the frankbook project joins only when deploy.sh saw a
-# frankbook trigger path (E2E_INCLUDE_FRANKBOOK=1). An explicit --project in
-# "$@" takes over untouched.
+# frankbook trigger path (E2E_INCLUDE_FRANKBOOK=1). Other playwright args
+# (--list, --grep, file filters) pass through alongside the default set; an
+# explicit --project in "$@" takes over untouched.
 DEFAULT_PROJECTS=(setup standard admin guest)
 if [[ "${E2E_INCLUDE_FRANKBOOK:-0}" == "1" ]]; then
     DEFAULT_PROJECTS+=(frankbook)
@@ -43,11 +44,10 @@ for arg in "$@"; do
         --project|--project=*) has_project=1 ;;
     esac
 done
-if [[ "$has_project" -eq 1 ]]; then
-    exec npx playwright test "$@"
-fi
 PROJECT_ARGS=()
-for project in "${DEFAULT_PROJECTS[@]}"; do
-    PROJECT_ARGS+=(--project "$project")
-done
-exec npx playwright test "${PROJECT_ARGS[@]}"
+if [[ "$has_project" -eq 0 ]]; then
+    for project in "${DEFAULT_PROJECTS[@]}"; do
+        PROJECT_ARGS+=(--project "$project")
+    done
+fi
+exec npx playwright test "$@" "${PROJECT_ARGS[@]}"