Remove BLE-specific framing from docs

docs/_index.md

@@ -1,14 +1,13 @@
 # cs-midi
 
-A standalone pico-sdk extraction of [tttapa/Control-Surface](https://github.com/tttapa/Control-Surface) (GPL-3.0).
+A pico-sdk port of [tttapa/Control-Surface](https://github.com/tttapa/Control-Surface) (GPL-3.0).
 
-cs-midi provides the core MIDI element system, BLE MIDI transport, banks, selectors, and the declarative `Control_Surface` singleton for use with the Raspberry Pi Pico SDK and the CYW43 radio module (BTstack BLE backend).
+cs-midi provides the full Control Surface MIDI element system — output elements, input elements, banks, selectors, MIDI routing, and the declarative `Control_Surface` singleton — for use with the Raspberry Pi Pico SDK.
 
 ## Getting Started
 
 ```cpp
 #include "pico/stdlib.h"
-#include "pico/cyw43_arch.h"
 #include <cs_midi.h>
 
 using namespace cs;
@@ -19,7 +18,6 @@ NoteButton button {5, {MIDI_Notes::C[4], Channel_1}};
 
 int main() {
     stdio_init_all();
-    if (cyw43_arch_init()) return 1;
     Control_Surface.begin();
     while (true) {
         Control_Surface.loop();
@@ -31,10 +29,9 @@ int main() {
 ## Differences from Control Surface
 
 - `#include <cs_midi.h>` replaces `#include <Control_Surface.h>`
-- `cs::BluetoothMIDI_Interface` replaces `USBMIDI_Interface`
-- Standard `main()` with `cyw43_arch_init()` replaces Arduino `setup()`/`loop()`
+- Standard `main()` replaces Arduino `setup()`/`loop()`
 - All types live in the `cs::` namespace
-- No `MCU::` namespace — use raw CC numbers or `MIDI_CC::` constants
+- No `MCU::` namespace yet — use raw CC numbers or `MIDI_CC::` constants
 
 ## Credits
 

docs/classes.md

@@ -82,7 +82,7 @@ These classes are available in cs-midi and work identically to their Control Sur
 
 | Class | Template | Description |
 |-------|----------|-------------|
-| `BluetoothMIDI_Interface` | | BLE MIDI via CYW43 BTstack |
+| `BluetoothMIDI_Interface` | | BLE MIDI interface |
 
 ### MIDI Routing
 

docs/examples/03-interfaces/01-ble-midi.md

@@ -1,6 +1,6 @@
 # BLE MIDI
 
-Basic Bluetooth Low Energy MIDI interface setup. Replaces `USBMIDI_Interface` from the original library.
+Bluetooth Low Energy MIDI interface setup.
 
 ```cpp
 #include "pico/stdlib.h"