feat: M3 complete — WiFi, BT keyboard and mouse

Bluetooth (RTL8723D USB combo chip):
- GPIO pin 357 (active low) enables WiFi/BT hardware via x6200_gpio_set()
- bluez5_utils 5.64 (downgraded from 5.79 — HID input plugin broken in 5.79)
- rtl8723d_config.bin added to overlay (missing from linux-firmware package)
- S45wifi-bt: GPIO enable + modprobe btusb/uhid/hidp at boot
- S85bt-keyboard: auto-connect loop with scan+connect every 20s

WiFi (RTL8723DU):
- out-of-tree lwfinger/rtw88 driver (RTW88_8723DU not in kernel 6.1 mainline)
- linux-firmware RTL_RTW88 for rtw88/rtw8723d_fw.bin
- regulatory.db for cfg80211
- wpa_supplicant with multi-network config in /etc/wpa_supplicant.conf
- S46wifi: wpa_supplicant + udhcpc at boot

Key findings:
- RTL8723D USB WiFi (0bda:d723) requires out-of-tree rtw88 on kernel 6.1
- BT and WiFi share same USB device, both need GPIO 357 = 0 to power on
- bluez5 5.79 HID input plugin not linked into bluetoothd (build system bug)

README.md

@@ -41,12 +41,15 @@ The product name **Virtuoso** is reserved for when (if!) Mestre actually deliver
 
 | # | Milestone                                                            | Status |
 |---|----------------------------------------------------------------------|--------|
-| 1 | Boot a recent Buildroot LTS on the X6200 (serial console)            | 🟡 In progress |
-| 2 | Forward-port LCD panel driver — full display output                  | ⚪ Planned     |
-| 3 | piHPSDR running on X6200 with working audio                          | ⚪ Planned     |
-| 4 | `mestre` service: evdev → ALSA virtual MIDI bridge                   | ⚪ Planned     |
-| 5 | End-to-end: X6200 controlling Hermes-Lite 2 as a control head        | ⚪ Planned     |
-| 6 | First-boot wizard, settings persistence, polished UX                 | ⚪ Planned     |
+| 1 | Boot a recent Buildroot LTS on the X6200 (serial console)            | ✅ 2026-05-03  |
+| 2 | Working audio stack                                                  | ✅ 2026-05-06  |
+| 3 | WiFi and Bluetooth keyboard and mouse                                | ✅ 2026-05-09  |
+| 4 | Forward-port LCD panel driver — full display output                  | ✅ 2026-05-03  |
+| 5 | piHPSDR running on X6200, controlled by mouse and keyboard           | ⚪ Planned     |
+| 6 | piHPSDR audio — HL2 audio via SoC speaker                            | ⚪ Planned     |
+| 7 | `mestre` service: evdev → ALSA virtual MIDI bridge                   | ⚪ Planned     |
+| 8 | End-to-end: X6200 controlling Hermes-Lite 2 as a control head        | ⚪ Planned     |
+| 9 | First-boot wizard, settings persistence, polished UX                 | ⚪ Planned     |
 | ∞ | Earn the right to call it Virtuoso                                   | ⚪ TBD         |
 
 ## Architecture
@@ -66,7 +69,7 @@ The architecture is deliberately patch-free: piHPSDR is used as-is, and the MIDI
 
 ## Building
 
-> ⚠️ **Pre-1.0**: build instructions are aspirational while milestone 1 is in progress.
+> ⚠️ **Pre-1.0**: actively developed. Core build works; some milestones still in progress.
 
 ### Prerequisites
 
@@ -114,4 +117,4 @@ Mestre stands on the shoulders of others. In particular:
 ## License
 
 GPL-2.0-or-later, matching the kernel-derived components Mestre vendors.
-Userland components written specifically for Mestre may be re-licensed (e.g. to MIT) on a per-component basis where doing so doesn't conflict with this overall license; such cases will be marked clearly in the relevant subdirectory.
+Userland components written specifically for Mestre may be re-licensed (e.g. to MIT) on a per-component basis where doing so doesn't conflict with this overall license; such cases will be marked clearly in the relevant subdirectory.