feat(ui): add quick config toggles to Claude config editor (#1012)

Add 3 quick-toggle checkboxes above the JSON editor in Claude provider settings:
- Hide AI Attribution (sets attribution.commit/pr to empty string)
- Extended Thinking (sets alwaysThinkingEnabled to true)
- Teammates Mode (sets env.CLAUDE_CODE_EXPERIMENTAL_AGENT_TEAMS to "1")

Uses local state to keep toggles and JsonEditor in sync without
triggering ProviderForm re-renders. Includes i18n for zh/en/ja.

Co-authored-by: Jason <farion1231@gmail.com>

src/i18n/locales/ja.json

@@ -58,7 +58,10 @@
     "extractFromCurrent": "編集内容から抽出",
     "extractNoCommonConfig": "編集内容から抽出できる共通設定がありません",
     "extractFailed": "抽出に失敗しました: {{error}}",
-    "saveFailed": "保存に失敗しました: {{error}}"
+    "saveFailed": "保存に失敗しました: {{error}}",
+    "hideAttribution": "AI署名を非表示",
+    "alwaysThinking": "拡張思考",
+    "enableTeammates": "Teammates モード"
   },
   "header": {
     "viewOnGithub": "GitHub で見る",