fix(settings): surface "installed but not runnable" state in tool cards

After an install/update command succeeds, re-probe the tool version: if it
still can't be detected the tool is installed-but-unrunnable (e.g. Node too
old), so report a warning toast and show "installed · can't run" with the
cause, instead of a misleading "success" plus a stale version number.

Read the backend `installed_but_broken` flag rather than matching error
text; the card's current-version line, action button (no useless "install"
for a broken tool), and a "check environment" hint all key off it. Drop the
now-redundant version-clearing setState (the refresh merge already nulls it),
flatten the action ternary, and use extractErrorMessage in the catch path.

Adds toolNotRunnable / toolActionInstalledNotRunnable / installedNotRunnable
/ toolCheckEnv i18n keys (zh/en/ja).

src/i18n/locales/en.json

@@ -672,6 +672,10 @@
     "toolActionDone": "{{action}} completed for {{count}} tool(s)",
     "toolActionPartial": "{{action}} succeeded for {{succeeded}}, failed for {{failed}}",
     "toolActionFailed": "Install/update command failed",
+    "toolNotRunnable": "Installed but not runnable (no version detected)",
+    "toolActionInstalledNotRunnable": "Installed, but it can't run in the current environment — please check",
+    "installedNotRunnable": "Installed · can't run",
+    "toolCheckEnv": "Check environment",
     "envBadge": {
       "wsl": "WSL",
       "windows": "Win",

src/i18n/locales/ja.json

@@ -672,6 +672,10 @@
     "toolActionDone": "{{count}} 個のツールの{{action}}が完了しました",
     "toolActionPartial": "{{succeeded}} 個成功、{{failed}} 個失敗（{{action}}）",
     "toolActionFailed": "インストール/更新コマンドの実行に失敗しました",
+    "toolNotRunnable": "インストール済みですが実行できません（バージョン未検出）",
+    "toolActionInstalledNotRunnable": "インストールされましたが、現在の環境では実行できません。確認してください",
+    "installedNotRunnable": "インストール済み・実行不可",
+    "toolCheckEnv": "実行環境を確認",
     "envBadge": {
       "wsl": "WSL",
       "windows": "Win",

src/i18n/locales/zh.json

@@ -672,6 +672,10 @@
     "toolActionDone": "{{count}} 个工具{{action}}完成",
     "toolActionPartial": "{{succeeded}} 个{{action}}成功，{{failed}} 个失败",
     "toolActionFailed": "安装/升级命令执行失败",
+    "toolNotRunnable": "已安装但无法运行（未探测到版本）",
+    "toolActionInstalledNotRunnable": "已安装，但当前环境无法运行，请检查",
+    "installedNotRunnable": "已安装·无法运行",
+    "toolCheckEnv": "请检查运行环境",
     "envBadge": {
       "wsl": "WSL",
       "windows": "Win",