Generate App Url

Build a deep link into the TheirStack app for a given resource and return it as {"url": ...}. Pick the resource with the type field: company_list (view a list), job_search / company_search (open a search from filters — same filter shape as search_jobs_v1 / search_companies_v1), saved_search (open a saved search), or webhook (view a webhook). Search links (job_search / company_search) are workspace-independent — the encoded query opens against whoever's session loads it, so the link is portable when shared. The other types point at a workspace-specific resource and include the workspace, which is taken from the authenticated caller, so it is never passed in.