fix(observability): switch source map upload to glitchtip-cli

@sentry/vite-plugin uses sentry-cli which creates release entries but
doesn't upload files to GlitchTip's API correctly. Switch to the native
glitchtip-cli which uses the debug ID inject+upload approach that
GlitchTip actually supports.

ui/vite.config.ts

@@ -1,36 +1,14 @@
 import { sveltekit } from '@sveltejs/kit/vite';
 import tailwindcss from '@tailwindcss/vite';
 import { defineConfig } from 'vite';
-import { sentryVitePlugin } from '@sentry/vite-plugin';
 
 // Source maps are always generated so that the CI pipeline can upload them to
-// GlitchTip after a release build. The sentryVitePlugin upload step is only
-// active when SENTRY_AUTH_TOKEN is present (i.e. in the release CI job).
+// GlitchTip via glitchtip-cli after a release build.
 export default defineConfig({
 	build: {
 		sourcemap: true
 	},
-	plugins: [
-		tailwindcss(),
-		sveltekit(),
-		sentryVitePlugin({
-			org: 'libnovel',
-			project: 'libnovel-ui',
-			url: 'https://errors.libnovel.cc/',
-			// Auth token injected by CI via SENTRY_AUTH_TOKEN env var.
-			// When the env var is absent the plugin is a no-op.
-			authToken: process.env.SENTRY_AUTH_TOKEN,
-			// Release name matches the Docker image tag (e.g. "1.2.3").
-			release: { name: process.env.BUILD_VERSION },
-			// Don't upload source maps in local dev or CI type-check jobs.
-			disable: !process.env.SENTRY_AUTH_TOKEN,
-			// Source maps are uploaded to GlitchTip; do not ship them in the
-			// production bundle served to browsers.
-			sourcemaps: {
-				filesToDeleteAfterUpload: ['./build/**/*.map']
-			}
-		})
-	],
+	plugins: [tailwindcss(), sveltekit()],
 	ssr: {
 		// Force these packages to be bundled into the server output rather than
 		// treated as external requires. The production Docker image has no