refactor: split main runtime wrappers into focused modules

src/main/runtime/yomitan-settings-opener.ts

@@ -0,0 +1,32 @@
+type YomitanExtensionLike = unknown;
+type BrowserWindowLike = unknown;
+
+export function createOpenYomitanSettingsHandler(deps: {
+  ensureYomitanExtensionLoaded: () => Promise<YomitanExtensionLike | null>;
+  openYomitanSettingsWindow: (params: {
+    yomitanExt: YomitanExtensionLike;
+    getExistingWindow: () => BrowserWindowLike | null;
+    setWindow: (window: BrowserWindowLike | null) => void;
+  }) => void;
+  getExistingWindow: () => BrowserWindowLike | null;
+  setWindow: (window: BrowserWindowLike | null) => void;
+  logWarn: (message: string) => void;
+  logError: (message: string, error: unknown) => void;
+}) {
+  return (): void => {
+    void (async () => {
+      const extension = await deps.ensureYomitanExtensionLoaded();
+      if (!extension) {
+        deps.logWarn('Unable to open Yomitan settings: extension failed to load.');
+        return;
+      }
+      deps.openYomitanSettingsWindow({
+        yomitanExt: extension,
+        getExistingWindow: deps.getExistingWindow,
+        setWindow: deps.setWindow,
+      });
+    })().catch((error) => {
+      deps.logError('Failed to open Yomitan settings window.', error);
+    });
+  };
+}