[MOR-1648] Wire IC-7300 Break-in Delay drag to a bounded canonical write

[morozsm]

Linear: https://linear.app/morozsm/issue/MOR-1648

Problem

The IC-7300 desktop CW-panel Break-in Delay slider is shown with a fresh supported field, but an owner drag/release produced no Web command. This is a gesture-to-intent boundary defect, separate from radio execution or pending presentation.

Acceptance criteria

• One owner drag/release emits exactly one bounded Break-in Delay write intent after existing slider coalescing.
• The intent reaches the existing command path and writes IC-7300 CI-V 14 0F.
• Canonical state confirms resulting raw value or exposes a truthful failure/unconfirmed outcome.
• Focused wiring/command tests cover one drag, coalescing, and exact supported profile route.
• No new polling loop, per-control timer, optimistic radio truth, or transmit behavior.
• A non-TX IC-7300 hardware rerun verifies one gesture and final confirmed state.

Relationships

Related: MOR-1493, MOR-1641, MOR-1644. Adjacent to MOR-1646 but independently owned and not blocked by it.

Project fields

Status=Todo; WorkType=bug; Area=web-ui; Priority=P1; Phase=alpha; Owner=codex; Risk=medium; Size=S.

[morozsm]

Hardware rerun on exact candidate db09073faf6159d115aa2690faa83ed66ba25605: FAIL.

The Break-in Delay gesture emitted commands and reached the radio path, but the slider did not retain the requested position and the canonical Web value remained 139. This does not satisfy the required canonical confirmation or truthful unconfirmed outcome.

No TX/PTT action was performed. Keep this issue Open and In Progress.