Match OpenCode's TUI by interrupting only the selected session with resume:true. The previous Stop/double-Escape action interrupted active descendants in parallel; a background child's completion notification could wake the parent after its interruption had already settled, producing new model activity after Stop.
Keep background children independently owned and directly interruptible when selected. Native control/steering input retains TUI resume semantics rather than introducing a separate CodeNomad cancellation policy.
Cover selected parent/child scope in store tests and both gestures through real Chromium composer and keyboard handlers using the generated native client. Include an isolated native fixture with a temporary HOME/database, private server and loopback provider that reproduces the cascade restart and verifies selected-session interruption. UI typecheck, production build and both browser regressions passed on the reviewed branch; full-CI failure triage is documented in the PR.
