5988fe6cd5
Follow-up to @vishnukool's #24064 salvage: - cleanup skip now uses _is_headed_mode() (config browser.headed OR AGENT_BROWSER_HEADED env) instead of env-var-only, with env fallback if browser_tool import fails - browser.headed added to DEFAULT_CONFIG (default false) - 14 regression tests: resolution precedence, cleanup skip, --headed argv injection (local vs cloud), VM cleanup unaffected - docs: Headed Mode section in browser.md