Extend managed macOS client toward feature parity

docs/README.md

@@ -14,7 +14,7 @@ that implementation can start from a shared, agreed plan.
 | Area | Decision |
 |------|----------|
 | Code architecture | **Shared C++ core** (`libvoicecat`) consumed by native UIs over a **C ABI**. Server reuses the same core. |
-| Native clients | macOS/iOS in **Swift** (SwiftUI; Swift↔C++ interop), Windows in **C#** (`LibraryImport` P/Invoke). |
+| Native clients | Managed **C#** WinForms and AppKit replacements are implemented; Swift macOS remains the migration/release oracle pending manual cutover gates, and iOS remains Swift. |
 | Control transport | **TCP + TLS 1.3** (mbedTLS) |
 | Media transport | **UDP** secured by **TLS-exported keys + ChaCha20-Poly1305 AEAD** — mandatory, no plaintext mode (see [security.md](security.md)) |
 | Crypto libraries | **mbedTLS** (TLS 1.3) + **libsodium** (AEAD, Argon2id, Ed25519) — both permissive, **no GPL/LGPL anywhere** |
@@ -34,7 +34,7 @@ that implementation can start from a shared, agreed plan.
 5. [tech-stack.md](tech-stack.md) — Concrete libraries with versions and rationale, the permissive-license rule, build tooling, per-platform notes.
 6. [deployment.md](deployment.md) — The "set it up in a few minutes" story: Docker, single binary, source build, zero-config defaults.
 7. [roadmap.md](roadmap.md) — Milestones, what ships when, and the list of open questions still to resolve.
-8. [porting-to-dotnet.md](porting-to-dotnet.md) — **Proposal.** Step-by-step plan to replace the C++ core, C++ server, and Swift clients with a single .NET 10 / C# codebase. Dependency map, the TLS-exporter blocker, real-time-audio design, phased migration.
+8. [porting-to-dotnet.md](porting-to-dotnet.md) — **Active migration.** Step-by-step plan and implementation checkpoints for replacing the C++ core, C++ server, and replaceable Swift clients with .NET 10 / C#. Dependency map, TLS exporter, real-time-audio design, and phased cutover gates.
 
 ## Design principles