Prop helpers

Helper	Behavior
Inertia.lazy / lazy()	Omitted unless requested in a partial
Inertia.optional / optional()	Same as lazy
Inertia.defer / defer()	Listed in deferredProps for client follow-up
Inertia.once / once()	Evaluated once per response object
Inertia.merge / merge()	Listed in mergeProps for client merge

examples/inertia.py

from inertia import Inertia, lazy, defer, once, merge

return Inertia.render("Dashboard", {
    "stats": lazy(lambda: expensive()),
    "notes": defer(lambda: load_notes()),
})