i18n: back-fill daemon-startup hardening strings

Additively adds translations for the 6 new keys from this batch
(sb_daemon_extract_failed, sb_daemon_files_failed, loading_stall_{title,body,hint},
sb_plaintext_remote_blocked) across res/lang/*.json. es/de/fr/pt/ru get all 6; for
zh/ja/ko a string is only added when every glyph is already in the current
NotoSansCJK-Subset.ttf, since the subset can't be rebuilt here — 6 zh/ja/ko entries
whose glyphs aren't yet subsetted are left on the English fallback rather than render
as tofu. Written sorted, indent=4, ensure_ascii=False (matching add_missing_translations.py);
purely additive (42 insertions, 0 removals). The remaining 6 need a
scripts/build_cjk_subset.py font rebuild.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

res/lang/zh.json

@@ -734,6 +734,8 @@
     "lite_working": "处理中…",
     "loading": "加载中...",
     "loading_addresses": "正在加载地址...",
+    "loading_stall_body": "守护进程已初始化 %.0f 秒。更新后或首次启动时（加载区块索引或重新扫描）这可能是正常现象——就绪后会自动连接。",
+    "loading_stall_title": "耗时超出预期",
     "loading_transactions": "正在加载交易",
     "local_hashrate": "本地算力",
     "low_spec_mode": "低配模式",
@@ -1154,6 +1156,8 @@
     "sb_connecting_external": "正在连接外部守护进程...",
     "sb_connecting_generic": "正在连接守护进程...",
     "sb_daemon_crashed": "守护进程崩溃 %d 次",
+    "sb_daemon_extract_failed": "无法写入守护进程文件——请检查磁盘剩余空间和权限。",
+    "sb_daemon_files_failed": "无法将守护进程文件写入 %s——请检查磁盘剩余空间和权限。",
     "sb_daemon_not_found": "未找到守护进程",
     "sb_daemon_start_failed": "无法启动 dragonxd",
     "sb_dragonxd_running": "dragonxd 运行中",