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/zh.json

@@ -271,13 +271,18 @@
     "console_app": "应用",
     "console_auto_scroll": "自动滚动",
     "console_available_commands": "可用命令：",
+    "console_backend_reference": "后端命令参考",
     "console_backend_unavailable": "无后端",
     "console_capturing_output": "正在捕获守护进程输出...",
+    "console_cat_advanced": "高级",
     "console_cat_blockchain": "区块链",
     "console_cat_control": "控制",
+    "console_cat_keys": "密钥与安全",
     "console_cat_mining": "挖矿",
     "console_cat_network": "网络",
     "console_cat_raw_transactions": "原始交易",
+    "console_cat_send": "发送",
+    "console_cat_sync": "同步",
     "console_cat_utility": "实用工具",
     "console_cat_wallet": "钱包",
     "console_clear": "清除",
@@ -334,12 +339,14 @@
     "console_ref_run_confirm": "立即运行 %s？这是一个有重大影响的命令。",
     "console_ref_search_hint": "按名称或用途搜索…",
     "console_ref_select_hint": "选择一个命令以查看其功能。",
+    "console_ref_value": "值",
     "console_rpc_reference": "RPC 命令参考",
     "console_rpc_trace": "RPC",
     "console_scanline": "控制台扫描线",
     "console_search_commands": "搜索命令...",
     "console_select_all": "全选",
     "console_show_app_output": "显示[应用]钱包日志行",
+    "console_show_backend_ref": "显示后端命令参考",
     "console_show_daemon_output": "显示守护进程输出",
     "console_show_errors_only": "仅显示错误",
     "console_show_rpc_ref": "显示 RPC 命令参考",