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ayamirandl0ng-ai e231b16fb3 feat(ssh): allow remote image clipboard writes (#766)
* feat(ssh): allow remote image clipboard writes

* fix(ssh): keep a profile's clipboard grant across a re-attach

A native ssh pane's OSC 5522 permission is decided by the spec that
dialled the host, and the daemon is the only side that holds it. A window
reopening onto a pane that outlived it attaches by pane id, has no spec
to read, and sends `allow_remote_clipboard_write: false` — which the
daemon took as the new answer and the pane's own view took as a refusal.
Both sides then said no, so the first restart after switching the
permission on turned every copy into an `EPERM` with the switch still
reading "on".

Pin the spec's answer in the pane and route both attach and detach
through one decision point, so a pane that carries a spec keeps that
spec's answer whatever an attaching client claims, and a pane without one
— everything on a remote `tty7-server` — is exactly as permitted as its
controller says. On the client side, refuse only what the pane can see is
forbidden and leave the verdict to the daemon otherwise.

Also: release a failed transfer's buffered bytes instead of parking up to
`MAX_CLIPBOARD_BYTES` per pane until the next request, and answer the
capability probe with the permission actually in force rather than a
constant that always reads as "off".

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Co-authored-by: l0ng-ai <24760907+l0ng-ai@users.noreply.github.com>
2026-09-02 14:12:28 +08:00
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