ci: add Gitea CI and desktop release workflow

.gitea/workflows/ci.yml

@@ -0,0 +1,35 @@
+name: Desktop CI
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: https://git.daemonlord.ru/actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Set up Python
+        uses: https://git.daemonlord.ru/actions/setup-python@v5
+        with:
+          python-version: "3.13"
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install -r requirements.txt
+
+      - name: Validate syntax
+        run: |
+          python -m py_compile app_version.py main.py build.py tests/test_auth_relogin_smoke.py
+
+      - name: Run tests
+        run: |
+          python -m unittest tests/test_auth_relogin_smoke.py