Wrangler refuses to start `dev` when the configured `[assets].directory`
is missing and offers no option to create it. Local development serves
the web app from Vite, so `apps/web/dist` only exists after a previous
`build:web`; a fresh clone or `git clean` made `bun run dev` fail.
Resolve the directory from the effective Wrangler config (so custom
configs via WRANGLER_CONFIG are honored) and create it for every `dev`
command routed through run-wrangler. Deploy and migration commands are
unchanged.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>