Hook registry: list installed hooks + call counts in Injection panel

Add a process-wide hook registry (hook/src/hook_registry) that every hook
module registers its hooks with and bumps a counter from each detour. The
XInput, focus-spoof, and audio render-hooks now register their individual
hooks (XInputGetState/Ex/Caps/SetState; GetForegroundWindow/GetActiveWindow/
GetFocus/WndProc guard; IMMDevice::Activate, IAudioClient::Initialize/
GetService, IAudioRenderClient::GetBuffer/ReleaseBuffer) and count calls.

The worker publishes the table to the host each tick over a new HookStatus
field (protocol v4 -> v5: HookEntry[] + count). The Injection panel shows it
as a collapsible table grouped by subsystem with an installed flag and call
count per hook; coop_audio_probe prints the same table headless.

Verified against Phantom Brave: 13 hooks listed with live counts (focus APIs
polled heavily, GetBuffer/ReleaseBuffer ticking with the audio render loop).
All four tests pass.

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

host/src/ipc/ipc_server.hpp

@@ -31,6 +31,10 @@ struct HookStatusView
 	// Audio render-hook diagnostics (for the Audio panel's stream-count view).
 	std::uint32_t audio_streams_seen = 0;
 	AudioStreamInfo audio_streams[kMaxAudioStreams] = {};
+
+	// Installed-hooks registry (for the Injection panel's hook list).
+	std::uint32_t hook_entry_count = 0;
+	HookEntry hook_entries[kMaxHookEntries] = {};
 };
 
 class IpcServer