Deskew vs oblique: split parameter model and copy semantics (follow-up from #113)

[pablogventura]

Context

Detailed feedback from @zvezdochiot on #113 (see that thread and PR #114) describes limitations beyond the current PR scope:

• Difficulties copying parameters between pages when deskew and oblique are only partially decoupled.
• Manual oblique adjustments interacting badly with Auto deskew for batch/copy flows.
• Need to re-enable Auto oblique after Manual→Auto toggles even when the user had already opted in.

Proposed direction (discussion)

Treat deskew (rotation) and oblique (shear) as separate parameter domains (e.g. ParamsDeskew / ParamsOblique), each with its own Auto/Manual mode and angle value, and separate “Apply to…” / copy logic.

Scope

This issue is for design + implementation planning. It should not block merging PR #114 unless maintainers explicitly want a single mega-PR.

[pablogventura]

Implementation and feedback request are in PR #133: #133

Please try a current build from that branch (or CI artifacts when available) and comment here or on the PR with works / issues / regressions for your use case.

[pablogventura]

Implementation / feedback for the extended parameter model is in PR #133 (rebased on , includes oblique-mode XML and Apply To… split). Not merged yet — please test and report on that PR.

[pablogventura]

Update (May 2026): PR #133 was closed accidentally when its branch was deleted during cleanup — not an intentional drop of this fix.

The P0 work continues in #152 (restored fix/p0-plan-issues, rebased on current master). Please follow #152 for builds and feedback.

This issue remains open until that PR merges and we have confirmation on the relevant workflow.

[pablogventura]

Local re-test results for the extended deskew/oblique model are posted on #152 (commit 5e1e345): full unit-test suite green, plus new tests for selective Apply To… merge semantics and oblique-mode XML round-trip.

GUI smoke test on a real project is still recommended before merge; see the PR comment checklist.