feat(ui): add rectifier config panel in advanced settings

- Add RectifierConfigPanel component with master switch and thinking signature toggle
- Add API wrapper for rectifier config
- Add i18n translations for zh/en/ja

src/lib/api/settings.ts

@@ -134,4 +134,17 @@ export const settingsApi = {
   > {
     return await invoke("get_tool_versions");
   },
+
+  async getRectifierConfig(): Promise<RectifierConfig> {
+    return await invoke("get_rectifier_config");
+  },
+
+  async setRectifierConfig(config: RectifierConfig): Promise<boolean> {
+    return await invoke("set_rectifier_config", { config });
+  },
 };
+
+export interface RectifierConfig {
+  enabled: boolean;
+  requestThinkingSignature: boolean;
+}