refactor(astrolabe): upgrade to @nextcloud/vue 9.3.3 API

- Replace NcCheckboxRadioSwitch :checked with :model-value
- Replace NcCheckboxRadioSwitch @update:checked with @update:model-value
- Replace NcButton type="primary|secondary|tertiary" with variant prop
- Bump @nextcloud/vue minimum version to ^9.3.3

These changes address deprecated APIs removed in @nextcloud/vue v9.0.0:
- :checked/:update:checked was replaced by v-model/modelValue pattern
- type prop for button variants was replaced by variant prop

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

third_party/astrolabe/package.json

@@ -23,7 +23,7 @@
     "@nextcloud/initial-state": "^3.0.0",
     "@nextcloud/l10n": "^3.1.0",
     "@nextcloud/router": "^3.0.1",
-    "@nextcloud/vue": "^9.0.0",
+    "@nextcloud/vue": "^9.3.3",
     "markdown-it": "^14.1.0",
     "pdfjs-dist": "^4.0.379",
     "plotly.js-dist-min": "^2.35.3",