feat: (GUI) Dynamic app metadata configuration from package.json (#27)

* feat: add dynamic app configuration and macOS About panel support

- Set app name dynamically from package.json (productName or name field)
- Add About panel options with version, author, and homepage from package.json
- Configure app name before app ready for proper macOS menu bar display
- Centralize all app metadata in package.json for easier maintenance

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Co-Authored-By: Claude <noreply@anthropic.com>

* fix: replace require() with ES6 import for package.json in main.ts

Resolves @typescript-eslint/no-var-requires error by changing
`const packageJson = require('../package.json');` to
`import packageJson from '../package.json';`

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Co-Authored-By: Claude <noreply@anthropic.com>

* fix: resolve TypeScript compilation errors in main.ts

- Remove non-existent packageJson.productName reference on line 11
- Fix author field type handling on line 262 to properly handle string or object types

These fixes resolve TypeScript errors that were preventing successful compilation.

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Co-Authored-By: Claude <noreply@anthropic.com>

---------

Co-authored-by: Claude <noreply@anthropic.com>

Author: kimjoin2

src/main.ts

@@ -2,9 +2,15 @@ import { app, BrowserWindow, ipcMain, screen, Menu, Tray, nativeImage } from 'el
 import * as path from 'path';
 import { exec } from 'child_process';
 import { promisify } from 'util';
+import packageJson from '../package.json';
 
 const execAsync = promisify(exec);
 
+// Set app name before app is ready (important for macOS)
+// Use productName from package.json if available, otherwise use name
+const appName = packageJson.build?.productName || packageJson.name || 'CCUsage Widget';
+app.setName(appName);
+
 // Helper function to extract session name from sessionId
 function extractSessionNameFromId(sessionId: string): string {
   if (!sessionId) return 'session';
@@ -246,6 +252,19 @@ function updatePosition(position: WidgetConfig['position']) {
 }
 
 app.whenReady().then(() => {
+
+  // Set About panel options for macOS
+  app.setAboutPanelOptions({
+    applicationName: appName,
+    applicationVersion: packageJson.version,
+    version: packageJson.version,
+    copyright: 'Copyright © 2025 JeongJaeSoon',
+    authors: packageJson.author ? 
+      [typeof packageJson.author === 'string' ? packageJson.author : packageJson.author.name || 'JeongJaeSoon'] : 
+      ['JeongJaeSoon'],
+    website: packageJson.homepage || 'https://github.com/JeongJaeSoon/ccusage-widget'
+  });
+
   createWindow();
   createTray();