fix(i18n): rename "Write Common Config" checkbox to "Apply Common Config" (#4829)

* fix(i18n): rename "Write Common Config" checkbox to "Apply Common Config"

The original label "Write Common Config" (写入通用配置) was ambiguous
about data flow direction — it read as "write current config INTO the
common config" when the actual behavior is the reverse: merge the
saved common config snippet INTO this provider's config.

Rename to "Apply Common Config" across zh/zh-TW/en/ja, including all
hint/guide/notice references and component defaultValue fallbacks, to
make the action unambiguous. Also aligns the Gemini hint wording with
the claude/codex "when checked" phrasing.

* docs(ja): sync Japanese docs with renamed 'Apply Common Config' label

Codex review on #4829 pointed out the Japanese user manual and README
still referenced the old checkbox label after the rename.

- docs/user-manual/ja/2-providers/2.1-add.md: 共通設定を書き込み → 共通設定を適用
- README_JA.md: 共有設定を書き込む → 共有設定を適用

src/components/providers/forms/CommonConfigEditor.tsx

@@ -172,7 +172,7 @@ export function CommonConfigEditor({
               />
               <span>
                 {t("claudeConfig.writeCommonConfig", {
-                  defaultValue: "写入通用配置",
+                  defaultValue: "应用通用配置",
                 })}
               </span>
             </label>

src/components/providers/forms/GeminiConfigSections.tsx

@@ -69,7 +69,7 @@ export const GeminiEnvSection: React.FC<GeminiEnvSectionProps> = ({
             className="w-4 h-4 text-blue-500 bg-white dark:bg-gray-800 border-border-default rounded focus:ring-blue-500 dark:focus:ring-blue-400 focus:ring-2"
           />
           {t("geminiConfig.writeCommonConfig", {
-            defaultValue: "写入通用配置",
+            defaultValue: "应用通用配置",
           })}
         </label>
       </div>