refactor(console): unify lite + full-node console behind a pluggable executor

The two consoles were separate implementations (the rich full-node ConsoleTab and a
minimal RenderLiteConsoleTab). Introduce ConsoleCommandExecutor to abstract the only
real differences — command execution + log source — so both variants share the one rich
terminal (the lite console now gains selection, zoom, copy, and JSON-colored output).

- console_command_executor.{h,cpp}: interface + FullNodeConsoleExecutor (dragonxd log
  ingestion + RPC command execution, result queue) and LiteConsoleExecutor (lite
  diagnostics ring + backend runConsoleCommand/takeConsoleResult, connection/sync status).
- ConsoleTab::render() now takes a ConsoleCommandExecutor&; log ingestion, command
  submission, and command results flow through it. The RPC command-reference popup and
  the daemon/errors/rpc-trace/app filter toggles are gated on the executor's capabilities;
  the toolbar status dot + a status header come from the executor.
- Safety preserved: `clear`/`cls` is intercepted as a view-only clear in the shared UI so
  it is NEVER forwarded (the lite backend's `clear` wipes tx history); command output is
  not persisted to diagnostics.
- App owns the executor (created per variant) and routes both NavPages to console_tab_;
  lite_console_tab.{h,cpp} deleted.

Needs runtime verification of BOTH consoles (full-node RPC + lite: clear, seed/export
secrecy, sync status, command results).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/util/i18n.cpp

@@ -947,6 +947,8 @@ void I18n::loadBuiltinEnglish()
         // --- Console Tab ---
         strings_["console_auto_scroll"] = "Auto-scroll";
         strings_["console_available_commands"] = "Available commands:";
+        strings_["console_quit_note"] = "'quit'/'exit' aren't needed here — just close the window.";
+        strings_["lite_console_help_passthrough"] = "Any other input runs as a lite-wallet console command.";
         strings_["console_capturing_output"] = "Capturing daemon output...";
         strings_["console_clear"] = "Clear";
         strings_["console_clear_console"] = "Clear Console";