v1.4.0: LVGL UI, async radio TX, live TCP management, input fixes

- Migrate all screens to LVGL v8.4 widget system
- Non-blocking radio TX (async endPacket via LoRaInterface)
- Live TCP server switching with transient node cleanup
- Fix UI freeze during radio transmit
- Trackball long-press delete, deferred click with debounce
- Pin microReticulum to 392363c, fix list_directory API
- Fix CI build: portable include path, remove hardcoded local path

src/ui/LvStatusBar.cpp

@@ -0,0 +1,157 @@
+#include "LvStatusBar.h"
+#include "Theme.h"
+#include <Arduino.h>
+
+void LvStatusBar::create(lv_obj_t* parent) {
+    _bar = lv_obj_create(parent);
+    lv_obj_set_size(_bar, Theme::SCREEN_W, Theme::STATUS_BAR_H);
+    lv_obj_align(_bar, LV_ALIGN_TOP_LEFT, 0, 0);
+    lv_obj_set_style_bg_color(_bar, lv_color_hex(Theme::BG), 0);
+    lv_obj_set_style_bg_opa(_bar, LV_OPA_COVER, 0);
+    lv_obj_set_style_border_color(_bar, lv_color_hex(Theme::BORDER), 0);
+    lv_obj_set_style_border_width(_bar, 1, 0);
+    lv_obj_set_style_border_side(_bar, LV_BORDER_SIDE_BOTTOM, 0);
+    lv_obj_set_style_pad_all(_bar, 0, 0);
+    lv_obj_set_style_radius(_bar, 0, 0);
+    lv_obj_clear_flag(_bar, LV_OBJ_FLAG_SCROLLABLE);
+
+    const lv_font_t* font = &lv_font_montserrat_12;
+
+    // Left side: LoRa BLE WiFi indicators
+    _lblLora = lv_label_create(_bar);
+    lv_obj_set_style_text_font(_lblLora, font, 0);
+    lv_label_set_text(_lblLora, "LoRa");
+    lv_obj_align(_lblLora, LV_ALIGN_LEFT_MID, 4, 0);
+
+    _lblBle = lv_label_create(_bar);
+    lv_obj_set_style_text_font(_lblBle, font, 0);
+    lv_label_set_text(_lblBle, "BLE");
+    lv_obj_align(_lblBle, LV_ALIGN_LEFT_MID, 50, 0);
+
+    _lblWifi = lv_label_create(_bar);
+    lv_obj_set_style_text_font(_lblWifi, font, 0);
+    lv_label_set_text(_lblWifi, "WiFi");
+    lv_obj_align(_lblWifi, LV_ALIGN_LEFT_MID, 84, 0);
+
+    // Center: "Ratspeak"
+    _lblBrand = lv_label_create(_bar);
+    lv_obj_set_style_text_font(_lblBrand, font, 0);
+    lv_obj_set_style_text_color(_lblBrand, lv_color_hex(Theme::ACCENT), 0);
+    lv_label_set_text(_lblBrand, "Ratspeak");
+    lv_obj_align(_lblBrand, LV_ALIGN_CENTER, 0, 0);
+
+    // Right: Battery %
+    _lblBatt = lv_label_create(_bar);
+    lv_obj_set_style_text_font(_lblBatt, font, 0);
+    lv_label_set_text(_lblBatt, "");
+    lv_obj_align(_lblBatt, LV_ALIGN_RIGHT_MID, -4, 0);
+
+    // Toast overlay (hidden by default)
+    _toast = lv_obj_create(parent);
+    lv_obj_set_size(_toast, Theme::SCREEN_W, Theme::STATUS_BAR_H);
+    lv_obj_align(_toast, LV_ALIGN_TOP_LEFT, 0, 0);
+    lv_obj_set_style_bg_color(_toast, lv_color_hex(Theme::ACCENT), 0);
+    lv_obj_set_style_bg_opa(_toast, LV_OPA_COVER, 0);
+    lv_obj_set_style_pad_all(_toast, 0, 0);
+    lv_obj_set_style_radius(_toast, 0, 0);
+    lv_obj_clear_flag(_toast, LV_OBJ_FLAG_SCROLLABLE);
+    lv_obj_add_flag(_toast, LV_OBJ_FLAG_HIDDEN);
+
+    _lblToast = lv_label_create(_toast);
+    lv_obj_set_style_text_font(_lblToast, font, 0);
+    lv_obj_set_style_text_color(_lblToast, lv_color_hex(Theme::BG), 0);
+    lv_obj_center(_lblToast);
+    lv_label_set_text(_lblToast, "");
+
+    // Set initial indicator colors
+    refreshIndicators();
+}
+
+void LvStatusBar::update() {
+    // Handle announce flash timeout
+    if (_announceFlashEnd > 0 && millis() >= _announceFlashEnd) {
+        _announceFlashEnd = 0;
+        refreshIndicators();
+    }
+
+    // Handle toast timeout
+    if (_toastEnd > 0 && millis() >= _toastEnd) {
+        _toastEnd = 0;
+        lv_obj_add_flag(_toast, LV_OBJ_FLAG_HIDDEN);
+    }
+}
+
+void LvStatusBar::setLoRaOnline(bool online) {
+    _loraOnline = online;
+    refreshIndicators();
+}
+
+void LvStatusBar::setBLEActive(bool active) {
+    _bleActive = active;
+    refreshIndicators();
+}
+
+void LvStatusBar::setWiFiActive(bool active) {
+    _wifiActive = active;
+    refreshIndicators();
+}
+
+void LvStatusBar::setBatteryPercent(int pct) {
+    if (_battPct == pct) return;
+    _battPct = pct;
+    if (pct >= 0) {
+        char buf[8];
+        snprintf(buf, sizeof(buf), "%d%%", pct);
+        lv_label_set_text(_lblBatt, buf);
+        uint32_t col = Theme::PRIMARY;
+        if (pct <= 15) col = Theme::ERROR_CLR;
+        else if (pct <= 30) col = Theme::WARNING_CLR;
+        lv_obj_set_style_text_color(_lblBatt, lv_color_hex(col), 0);
+    }
+}
+
+void LvStatusBar::setTransportMode(const char* mode) {
+    (void)mode;
+}
+
+void LvStatusBar::flashAnnounce() {
+    _announceFlashEnd = millis() + 1000;
+    refreshIndicators();
+}
+
+void LvStatusBar::showToast(const char* msg, uint32_t durationMs) {
+    lv_label_set_text(_lblToast, msg);
+    _toastEnd = millis() + durationMs;
+    lv_obj_clear_flag(_toast, LV_OBJ_FLAG_HIDDEN);
+}
+
+void LvStatusBar::refreshIndicators() {
+    bool flashing = _announceFlashEnd > 0 && millis() < _announceFlashEnd;
+
+    // LoRa: green=online, red=offline, cyan if TX flash
+    if (flashing) {
+        lv_obj_set_style_text_color(_lblLora, lv_color_hex(Theme::ACCENT), 0);
+    } else if (_loraOnline) {
+        lv_obj_set_style_text_color(_lblLora, lv_color_hex(Theme::PRIMARY), 0);
+    } else {
+        lv_obj_set_style_text_color(_lblLora, lv_color_hex(Theme::ERROR_CLR), 0);
+    }
+
+    // BLE: green=active, yellow=enabled-not-connected, red=disabled
+    if (_bleActive) {
+        lv_obj_set_style_text_color(_lblBle, lv_color_hex(Theme::PRIMARY), 0);
+    } else if (_bleEnabled) {
+        lv_obj_set_style_text_color(_lblBle, lv_color_hex(Theme::WARNING_CLR), 0);
+    } else {
+        lv_obj_set_style_text_color(_lblBle, lv_color_hex(Theme::ERROR_CLR), 0);
+    }
+
+    // WiFi: green=connected, yellow=enabled-not-connected, red=disabled
+    if (_wifiActive) {
+        lv_obj_set_style_text_color(_lblWifi, lv_color_hex(Theme::PRIMARY), 0);
+    } else if (_wifiEnabled) {
+        lv_obj_set_style_text_color(_lblWifi, lv_color_hex(Theme::WARNING_CLR), 0);
+    } else {
+        lv_obj_set_style_text_color(_lblWifi, lv_color_hex(Theme::ERROR_CLR), 0);
+    }
+}