Add Current Tasks roadmap: injection hardening + audio-format correlation

Replace the Future-work section with a single "Current Tasks" list:
- Injection hardening: toggling "Mirror video" has crashed a real game
  (Brotato) via a hook install/remove race. Test-first task -- make
  mock_game_test's hook/unhook stress aggressive enough to reproduce the
  crash (tight video-subsystem toggles from a separate thread while the game
  presents, across all backends), then apply the audio hooks' safe-unhook
  guard (epoch bump + restore-then-drain in-flight detours) to the Present /
  D3D9 / D3D10 / OpenGL / Vulkan hooks.
- Audio format by correlating the loopback (known device format) and
  render-hook (unknown format) captures instead of guessing: (a) rate
  verification/correction, (b) channel + bit-depth recovery.
- Mouse + keyboard forwarding (Raw Input / DirectInput) folded in.

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

README.md

@@ -107,7 +107,41 @@ default** and covers anything the hooked path doesn't.
 
 ## Roadmap
 
-### Future work
+### Current Tasks
+
+- **Injection hardening — provoke, then fix, the hook install/remove races.** Rapidly
+  toggling the **"Mirror video"** button has crashed a real game (Brotato): flipping the
+  Present-hook video subsystem on/off in quick succession races hook install/remove against
+  the game's Present thread and the host's capture path. Per the test-first rule, *first make
+  the crash reproducible in a test* — make `mock_game_test`'s hook/unhook stress against
+  `coop_mock_game` far more aggressive: tight, repeated subsystem toggles (especially video)
+  while the game is actively presenting, driven from a separate thread so the toggles interleave
+  with the Present detour, sustained long enough that an unguarded race is near-certain to
+  fault, and across all backends (DX11/12/9/10/GL/Vulkan). Then fix what it surfaces — the
+  install/remove path is the same safe-unhook problem the **audio** hooks already solved (bump
+  an epoch on each toggle, restore the vtable/inline first so no new detour starts, then drain
+  in-flight detours before tearing down shared state); apply the equivalent guard to the
+  Present / D3D9 / D3D10 / OpenGL / Vulkan hooks.
+
+- **Determine a pre-existing stream's audio format by *correlating* the two capture
+  paths, instead of guessing.** When we attach to an already-running game we never saw its
+  `IAudioClient::Initialize`, so the render-hook assumes the device mix format and measures
+  only the sample rate from the render cadence — which can be wrong on a jittery game
+  (intermittent pitch shift) and can't recover channels/bit-depth at all. But during the
+  measurement window the game is still audible, so we already have *both* signals of the
+  same audio: the **process-loopback** capture (post-mix, at the **known** device format)
+  and the **render-hook** capture (pre-mix, at the unknown format). Cross-correlating them
+  pins the real format from ground truth rather than a guess. Two tasks:
+  - **(a) Rate verification/correction.** Resample the hook stream by each candidate standard
+    rate and cross-correlate against the loopback; the rate that holds alignment with no drift
+    over the window is the truth. Robust where cadence measurement is noisy — directly hardens
+    the intermittent pitch-shift symptom. Lands as a verify-and-correct step feeding the
+    existing rate path (the operator override stays as the manual escape hatch).
+  - **(b) Channels + bit-depth recovery.** Extend the correlation to the layout the cadence
+    method *can't* recover: interpret the hook bytes under candidate layouts (float32 vs
+    int16; mono/stereo/…) and keep whichever de-interleaving correlates with the loopback (a
+    wrong interpretation is noise and won't). Removes the "channels/bit-depth assumed = device"
+    limitation, so the garbled-layout case stops being undetectable.
 
 - **Mouse + keyboard forwarding for Raw Input / DirectInput games.** The MKB
   subsystem forwards via window messages (`PostMessage`) plus synthesized