fix(astrolabe): define appName and appVersion for @nextcloud/vue

The @nextcloud/vue library (v9.x) requires appName and appVersion to be
defined as global constants at build time. Without these, the library
logs an error: "The '@nextcloud/vue' library was used without setting /
replacing the 'appName'."

This fix reads the app ID and version from appinfo/info.xml and injects
them via Vite's define option, matching how @nextcloud/webpack-vue-config
handles this for webpack-based apps.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

third_party/astrolabe/vite.config.js

@@ -1,9 +1,19 @@
 import { defineConfig } from 'vite'
 import vue from '@vitejs/plugin-vue'
 import { resolve } from 'path'
+import { readFileSync } from 'fs'
+
+// Read app info from info.xml for @nextcloud/vue
+const infoXml = readFileSync(resolve(__dirname, 'appinfo/info.xml'), 'utf-8')
+const appName = infoXml.match(/<id>([^<]+)<\/id>/)?.[1] || 'astrolabe'
+const appVersion = infoXml.match(/<version>([^<]+)<\/version>/)?.[1] || ''
 
 export default defineConfig({
   plugins: [vue()],
+  define: {
+    appName: JSON.stringify(appName),
+    appVersion: JSON.stringify(appVersion),
+  },
   build: {
     outDir: '.',
     emptyOutDir: false,