feat(console): lite backend command-reference modal

Give the lite console the parity analog of the full-node RPC command
reference: the same searchable two-pane modal (browse/search, detail
pane, examples, Insert / Insert & run, destructive confirm), driven by
the lite backend's own command set instead of daemon RPC.

- ConsoleCommandExecutor::commandReference() returns the category table
  (full node = consoleCommandCategories(); lite = new
  liteConsoleCommandCategories() -- 25 backend verbs in 5 categories).
  The shared renderCommandsPopup reads the table from the executor.
- The Commands button now shows for both variants (gated on
  commandReference()!=nullptr); title/tooltip/arg-quoting branch on
  hasRpcReference() (clarified to mean "speaks JSON-RPC / full node").
- Lite args are bare tokens (the backend takes one unsplit arg string
  and does not strip quotes), so the param-builder's JSON string
  auto-quoting is disabled for lite -- Insert & run emits runnable bare
  commands. send uses the JSON-array form (its positional form is
  unreachable via the single-arg transport); new uses zs/R; import
  takes just the key (the backend hardcodes birthday=0).

Adds 7 i18n keys across all 8 languages (additive). Full-node behavior
is unchanged. Adversarially reviewed (data vs the backend registry,
plumbing/regression, i18n) with all findings fixed.

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

res/lang/de.json

@@ -271,13 +271,18 @@
     "console_app": "App",
     "console_auto_scroll": "Automatisch scrollen",
     "console_available_commands": "Verfügbare Befehle:",
+    "console_backend_reference": "Backend-Befehlsreferenz",
     "console_backend_unavailable": "Kein Backend",
     "console_capturing_output": "Erfasse Daemon-Ausgabe...",
+    "console_cat_advanced": "Erweitert",
     "console_cat_blockchain": "Blockchain",
     "console_cat_control": "Steuerung",
+    "console_cat_keys": "Schlüssel & Sicherheit",
     "console_cat_mining": "Mining",
     "console_cat_network": "Netzwerk",
     "console_cat_raw_transactions": "Rohtransaktionen",
+    "console_cat_send": "Senden",
+    "console_cat_sync": "Synchronisierung",
     "console_cat_utility": "Dienstprogramme",
     "console_cat_wallet": "Wallet",
     "console_clear": "Leeren",
@@ -334,12 +339,14 @@
     "console_ref_run_confirm": "%s jetzt ausführen? Dies ist ein folgenreicher Befehl.",
     "console_ref_search_hint": "Nach Name oder Aufgabe suchen…",
     "console_ref_select_hint": "Wählen Sie einen Befehl, um zu sehen, was er tut.",
+    "console_ref_value": "Wert",
     "console_rpc_reference": "RPC-Befehlsreferenz",
     "console_rpc_trace": "RPC",
     "console_scanline": "Konsolen-Scanline",
     "console_search_commands": "Befehle suchen...",
     "console_select_all": "Alles auswählen",
     "console_show_app_output": "[App]-Wallet-Protokollzeilen anzeigen",
+    "console_show_backend_ref": "Backend-Befehlsreferenz anzeigen",
     "console_show_daemon_output": "Daemon-Ausgabe anzeigen",
     "console_show_errors_only": "Nur Fehler anzeigen",
     "console_show_rpc_ref": "RPC-Befehlsreferenz anzeigen",