docs: mark overlay-toggle + UI-generalize roadmap items done

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

README.md

@@ -97,13 +97,20 @@ Producer-side capture is proven; these still need a human / full setup to confir
 
 ## Roadmap
 
+Done:
+
+- **Usable overlay. ✅** F1 hides the whole overlay so the window is a clean
+  mirror for Remote Play Together; a fading hint shows the way back. The
+  pipelines keep running while hidden.
+- **Generalized UI. ✅** A top menu bar carries a consolidated FPS / frame-time
+  (with jitter) readout and a **View** menu that toggles each panel and a global
+  **Debug details** switch. Panels default to general-purpose status (attached,
+  forwarding, controller polling rate, mirror resolution, audio source + buffered
+  ms) and reveal the verbose diagnostics (per-slot poll table, focus-API counts,
+  input-path detection, per-render-stream table) only when Debug details is on.
+
 Future work, roughly in priority order:
 
-- **Make the tool usable, not just demonstrable:** toggle the debug overlay
-  on/off so the mirror window can be used clean.
-- **Generalize the UI:** rework the panels from bug-specific debug readouts into
-  general-purpose status, and add broader debug info (latency, frame timing,
-  per-channel stats).
 - **Present-hook video path:** capture the game's frames by hooking
   `IDXGISwapChain::Present` in the injected DLL and sharing the backbuffer via a
   shared D3D11 texture, as a lower-latency / more stable alternative to WGC.