key command: del and tab

The serial and Debug Console `key` command could type characters but not
erase them, so text typed into a field by mistake couldn't be cleared
remotely. `key del` and `key tab` inject Delete and Tab.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EhqxQ49eCju4CzKYNjZzwT

src/main.cpp

@@ -325,7 +325,7 @@ static const char* const kHelp =
     "log level <0-5>   ESP-IDF log level (0 none ... 5 verbose)\n"
     "crash             the last crash: firmware, reason, task, backtrace\n"
     "coredump erase    forget the core dump in flash\n"
-    "key <name|char>   press a key: up down left right select back home, or one character\n"
+    "key <name|char>   press a key: up down left right select back home del tab, or one character\n"
     "wifi status | wifi add <ssid><TAB><password>\n"
     "irc start | irc dump | irc say <buffer> <text>\n"
     "ls [folder] | rm <path> | install <path.ota> (Update from SD)\n"
@@ -394,10 +394,11 @@ static void runCommand(String line) {
     if (line == "burst")
         for (int i = 1; i <= 5; i++)
             bus.publish(Event::withText(EventType::Notification, ("Burst " + String(i)).c_str(), 0));
-    if (line.startsWith("key ")) {  // key up|down|left|right|select|back|home
+    if (line.startsWith("key ")) {  // key up|down|left|right|select|back|home|del|tab
         String k = line.substring(4);
         Key key = k == "up" ? Key::Up : k == "down" ? Key::Down : k == "left" ? Key::Left
-                : k == "right" ? Key::Right : k == "back" ? Key::Back : k == "home" ? Key::Home : Key::Select;
+                : k == "right" ? Key::Right : k == "back" ? Key::Back : k == "home" ? Key::Home
+                : k == "del" ? Key::Delete : k == "tab" ? Key::Tab : Key::Select;
         KeyEvent ev = k.length() == 1 && k[0] > ' ' ? KeyEvent::character((unsigned char)k[0]) : KeyEvent::of(key);
         if (!power->onKey(millis())) apps->handleKey(ev);
     }