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/LvInput.cpp

@@ -0,0 +1,73 @@
+#include "LvInput.h"
+#include "hal/Keyboard.h"
+#include "hal/Trackball.h"
+#include "hal/TouchInput.h"
+
+namespace LvInput {
+
+static Keyboard* s_kb = nullptr;
+static Trackball* s_tb = nullptr;
+static TouchInput* s_touch = nullptr;
+static lv_group_t* s_group = nullptr;
+
+// Keypad indev state
+static uint32_t s_lastKey = 0;
+static lv_indev_state_t s_keyState = LV_INDEV_STATE_RELEASED;
+static bool s_keyReady = false;
+
+// Touch disabled — GT911 coordinate mapping needs calibration
+
+static void keypad_read_cb(lv_indev_drv_t* drv, lv_indev_data_t* data) {
+    if (s_keyReady) {
+        data->key = s_lastKey;
+        data->state = s_keyState;
+        s_keyReady = false;
+    } else {
+        data->state = LV_INDEV_STATE_RELEASED;
+    }
+}
+
+void init(Keyboard* kb, Trackball* tb, TouchInput* touch) {
+    s_kb = kb;
+    s_tb = tb;
+    s_touch = touch;
+
+    // Create input group
+    s_group = lv_group_create();
+    lv_group_set_default(s_group);
+
+    // Register keypad indev
+    static lv_indev_drv_t keyDrv;
+    lv_indev_drv_init(&keyDrv);
+    keyDrv.type = LV_INDEV_TYPE_KEYPAD;
+    keyDrv.read_cb = keypad_read_cb;
+    lv_indev_t* keyIndev = lv_indev_drv_register(&keyDrv);
+    lv_indev_set_group(keyIndev, s_group);
+
+    // Touch indev disabled — GT911 coordinate mapping needs calibration
+    Serial.println("[LVGL] Input drivers registered (touch disabled)");
+}
+
+void feedKey(const KeyEvent& evt) {
+    uint32_t key = 0;
+
+    if (evt.enter) key = LV_KEY_ENTER;
+    else if (evt.up) key = LV_KEY_UP;
+    else if (evt.down) key = LV_KEY_DOWN;
+    else if (evt.left) key = LV_KEY_LEFT;
+    else if (evt.right) key = LV_KEY_RIGHT;
+    else if (evt.del) key = LV_KEY_BACKSPACE;
+    else if (evt.tab) key = LV_KEY_NEXT;
+    else if (evt.character == 0x1B) key = LV_KEY_ESC;
+    else return;  // Don't feed printable chars — screens handle them via handleKey()
+
+    s_lastKey = key;
+    s_keyState = LV_INDEV_STATE_PRESSED;
+    s_keyReady = true;
+}
+
+lv_group_t* group() {
+    return s_group;
+}
+
+}  // namespace LvInput