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.

.gitea/workflows/release.yaml

@@ -158,12 +158,31 @@ jobs:
       - name: Install dependencies
         run: npm ci
 
-      - name: Build with source maps and upload to GlitchTip
-        env:
-          SENTRY_AUTH_TOKEN: ${{ secrets.GLITCHTIP_AUTH_TOKEN }}
-          BUILD_VERSION: ${{ gitea.ref_name }}
+      - name: Build with source maps
         run: npm run build
 
+      - name: Download glitchtip-cli
+        run: |
+          curl -L https://gitlab.com/glitchtip/glitchtip-cli/-/releases/permalink/latest/downloads/glitchtip-cli-x86_64-unknown-linux-musl \
+            -o /usr/local/bin/glitchtip-cli
+          chmod +x /usr/local/bin/glitchtip-cli
+
+      - name: Inject debug IDs into build artifacts
+        run: glitchtip-cli sourcemaps inject ./build
+        env:
+          SENTRY_URL: https://errors.libnovel.cc/
+          SENTRY_AUTH_TOKEN: ${{ secrets.GLITCHTIP_AUTH_TOKEN }}
+          SENTRY_ORG: libnovel
+          SENTRY_PROJECT: libnovel-ui
+
+      - name: Upload source maps to GlitchTip
+        run: glitchtip-cli sourcemaps upload ./build --release ${{ gitea.ref_name }}
+        env:
+          SENTRY_URL: https://errors.libnovel.cc/
+          SENTRY_AUTH_TOKEN: ${{ secrets.GLITCHTIP_AUTH_TOKEN }}
+          SENTRY_ORG: libnovel
+          SENTRY_PROJECT: libnovel-ui
+
   # ── docker: ui ────────────────────────────────────────────────────────────────
   docker-ui:
     name: Docker / ui