Bluetooth and Wi-Fi improvements (#622)

- Enable BT by default in DTS, and create separate radio on/of functionality (like recent Wi-Fi changes)
- Bluetooth event handling now uses queued subscriptions, improving event delivery and application responsiveness.
- Improved synchronization of Bluetooth advertising, connections, HID, MIDI, and SPP operations.
- Enhanced cleanup during Bluetooth shutdown and subscription removal.
- Clarified Bluetooth start and stop behavior.
- Improved wifi driver subscription stability to prevent endless loops

Tactility/Private/Tactility/app/btmanage/BtManagePrivate.h

@@ -7,9 +7,6 @@
 #include <Tactility/bluetooth/Bluetooth.h>
 #include <tactility/drivers/bluetooth.h>
 
-#include <atomic>
-#include <memory>
-
 namespace tt::app::btmanage {
 
 struct Context {
@@ -19,13 +16,7 @@ struct Context {
     State state;
     View view = View(&bindings, &state);
     Device* btDevice = nullptr;
-    bool callbackRegistered = false;
-
-    // Bumped right before the BT event callback is unregistered at the end of appMain(), to
-    // invalidate any BT event already dispatched to the main task for this instance. Kept in
-    // its own heap allocation, independent of Context's (stack-local) lifetime, so a dispatched
-    // callback can check it without touching a possibly already-destroyed Context.
-    std::shared_ptr<std::atomic<int>> generation = std::make_shared<std::atomic<int>>(0);
+    BtEventSubscription btEventSub {};
 
     void lock() { mutex.lock(); }
     void unlock() { mutex.unlock(); }
@@ -34,15 +25,4 @@ struct Context {
 void onBtEvent(Context* ctx, const struct BtEvent& event);
 void requestViewUpdate(Context* ctx);
 
-// Re-attempts registering the device event callback. Needed because the BLE driver only
-// allocates its callback list while the device is started/on: a registration attempted while
-// the radio is off silently no-ops, so this must be called again right after a successful
-// bluetooth::start(). Idempotent: no-ops if already registered for this device.
-void registerDeviceCallback(Context* ctx, Device* dev);
-
-// Call after bluetooth::stop(): the driver frees its callback list on stop, so the
-// registration state must be cleared here too, without touching the (now-dangling) driver-side
-// list.
-void forgetCallbackRegistration(Context* ctx);
-
 } // namespace tt::app::btmanage