Full-text, typo-tolerant search across name, phone, company, and tags. Results are ranked by similarity then recency. If the query contains digits, also matches against the normalized (digits-only, last 10) phone so 555-123 and (555) 123 find the same contact. With injectCalls=true, recent matching calls are returned as synthetic contacts (source WEB, max 5) — useful for surfacing numbers that aren't saved yet.