fix: curl fetch for Linux updater, overlay restart restore, Yomitan late

- Use /usr/bin/curl on Linux for update checks to avoid Electron net-service crashes
- Restore visible overlay on manual restart even when auto-start visibility is disabled
- Reload overlay windows after Yomitan extension loads to fix popup race on startup

src/main/runtime/yomitan-extension-overlay-reload.test.ts

@@ -0,0 +1,33 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import { reloadOverlayWindowsForYomitanContentScripts } from './yomitan-extension-overlay-reload';
+
+test('reloadOverlayWindowsForYomitanContentScripts reloads only live overlay windows', () => {
+  const calls: string[] = [];
+  const windows = [
+    {
+      isDestroyed: () => false,
+      webContents: {
+        isDestroyed: () => false,
+        reload: () => calls.push('live'),
+      },
+    },
+    {
+      isDestroyed: () => true,
+      webContents: {
+        isDestroyed: () => false,
+        reload: () => calls.push('destroyed-window'),
+      },
+    },
+    {
+      isDestroyed: () => false,
+      webContents: {
+        isDestroyed: () => true,
+        reload: () => calls.push('destroyed-webcontents'),
+      },
+    },
+  ];
+
+  assert.equal(reloadOverlayWindowsForYomitanContentScripts(windows), 1);
+  assert.deepEqual(calls, ['live']);
+});