[tiensonqin]

Summary

Add Backend.InputNode(ui.InputTarget) to resolve MyGo's actual committed hit/focus ancestry to the nearest retained LUI host binding. InputNode.Current() checks visibility and retained incarnation, so delayed pointer actions cannot target a different node that reused the same numeric ID. No geometry inference or private runtime access.

Pin the published MyGo capture API from logseq/mygo#1 at v0.0.0-20261025203821-7875529a3c4d (the exact pinned parity lineage, not upstream main). The integration owner can subsequently combine capture/geometry/theme APIs and update to that reachable lineage. docs/api-migrations.md documents the new public contract and duplicate-forwarding rule.

Validation in platform/mygo, without a workspace or temporary replacements (GOWORK=off): CGO_ENABLED=0 go test ./..., go vet ./..., and go build ./... passed against the published pin. go test -race -count=1 ./... also passed. No GUI testing was performed.

Link to Devin session: https://app.devin.ai/sessions/5024f3589d8b4e5d87cb89b53327e279
Open in Devin Desktop: https://app.devin.ai/desktop/session/5024f3589d8b4e5d87cb89b53327e279?variant=devin
Requested by: @tiensonqin

[devin-ai-integration]

I'll fix CI failures and address comments from users with write access. I'll skip comments containing "(aside)".

• Disable automatic comment, CI, and merge conflict monitoring

[devin-ai-integration]

Closed as superseded by #276, which includes the capture API from this branch together with the theme/geometry APIs and a combined MyGo dependency pin. The published capture-only pin in this branch passed GOWORK=off tests, race tests, vet and build; the integration PR now owns subsequent CI and pin updates.