[uniblab]

Summary

• Prepare Icod.DCurses 2.5.0 stable source on this PR (not merged, tagged or published).
• Qualify existing independent foreground/background styles through logical mutation, wide-cell repair, pads/viewports, opaque and blank-transparent panels, style-only refresh, constrained profiles and lifecycle repaint. No new public runtime API or production implementation was needed.
• Add permanent tests, a public-only interactive color sample, isolated package consumer, durable README guidance, unchanged API fingerprint, changelog and release metadata. Sole direct runtime dependency remains Icod.Terminal 1.29.0.

Gates

• T2506 evidence: full Staging/Release builds, tests, package consumer and measured refresh budgets.
• Exact RC head adb2223: workflow 38303512455 passed package validation and all six Windows/Linux/macOS x64/ARM64 runtime Staging jobs.
• Stable source 0960765: forced restore, full Release solution build (zero warnings/errors), 1,465/1,465 tests each net8/9/10, 2.5.0 NuGet/symbol packages, isolated consumers on all three frameworks, Linux pseudo-terminal smoke, and workflow 38304803035 all passed. T2507 evidence and artifact hashes.
• Final reviewed PR head fdd593b: workflow 38313539847 passed package validation and all six runtime matrix jobs; full base-to-head git diff --check passed. The final follow-ups only reconcile roadmaps, documentation whitespace, and durable sample release wording.
• Public API unchanged from 2.4: 109 types, 857 contract lines, SHA-256 87a3ffe66174634f6db4044b914b05fd31d117b93ecf5b1a151d31d59732e65e.

Limitations and handoff

Local net8/9 tests used roll-forward to .NET 10; PowerShell wrappers and live visual terminal color checks were unavailable locally and are not claimed passes. Automated matrices cover all three OS families and both architectures; live macOS/Linux observations remain expressly waived/unverified as discussed. Maintainer alone merges, tags and publishes.