Add coverage badge to README and update test workflow: include coverage badge in README for CI visibility and enhance test workflow to generate coverage reports and update the badge on main branch pushes.

.gitea/workflows/test.yml

@@ -9,15 +9,47 @@ jobs:
   backend-tests:
     runs-on: ubuntu-latest
     container: mcr.microsoft.com/dotnet/sdk:10.0
+    permissions:
+      contents: write
     steps:
       - uses: actions/checkout@v4
       - name: Restore
         working-directory: backend
         run: dotnet restore TeleWave.slnx
-      - name: Test
+      - name: Test + coverage
         working-directory: backend
         run: >
           dotnet test TeleWave.slnx
           -c Release
           --no-restore
+          --collect:"XPlat Code Coverage"
+          --results-directory ./coverage
           --logger "console;verbosity=normal"
+
+      # Бейдж покрытия обновляем только для main (не для PR/форков): генерируем SVG и
+      # force-пушим в отдельную orphan-ветку badges — README ссылается на её raw-URL.
+      - name: Coverage badge
+        if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+        working-directory: backend
+        env:
+          TOKEN: ${{ secrets.COVERAGE_TOKEN || secrets.GITEA_TOKEN }}
+        run: |
+          dotnet tool install --global dotnet-reportgenerator-globaltool
+          export PATH="$PATH:$HOME/.dotnet/tools"
+          reportgenerator \
+            "-reports:coverage/**/coverage.cobertura.xml" \
+            "-targetdir:coverage/badges" \
+            "-reporttypes:Badges" \
+            "-assemblyfilters:+TeleWave.Domain;+TeleWave.Application" \
+            "-classfilters:-System.*"
+          BADGE=coverage/badges/badge_linecoverage.svg
+          test -f "$BADGE" || { echo "badge not generated"; exit 1; }
+          WORK=$(mktemp -d)
+          cp "$BADGE" "$WORK/coverage.svg"
+          cd "$WORK"
+          git init -q -b badges
+          git add coverage.svg
+          git -c user.name=gitea-actions -c user.email=actions@local \
+            commit -q -m "coverage badge [skip ci]"
+          git push -f \
+            "https://gitea-actions:${TOKEN}@gitea.hsrv.site/mrleo1nid/TeleWave.git" badges

README.md

@@ -2,6 +2,7 @@
 
 [![build](https://gitea.hsrv.site/mrleo1nid/TeleWave/actions/workflows/build.yml/badge.svg)](https://gitea.hsrv.site/mrleo1nid/TeleWave/actions?workflow=build.yml)
 [![tests](https://gitea.hsrv.site/mrleo1nid/TeleWave/actions/workflows/test.yml/badge.svg)](https://gitea.hsrv.site/mrleo1nid/TeleWave/actions?workflow=test.yml)
+[![coverage](https://gitea.hsrv.site/mrleo1nid/TeleWave/raw/branch/badges/coverage.svg)](https://gitea.hsrv.site/mrleo1nid/TeleWave/actions?workflow=test.yml)
 
 **TeleWave** — сервис онлайн-каналов: пользователи смотрят сетку каналов, видео отдаётся из
 хранилища на сервере, админ управляет каналами и пользователями.