Fix black formatting and target Python 3.12 in CI

Reformat 8 files and add --target-version py312 to avoid
3.13 AST parsing issues with Python 3.12 container.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitea/workflows/ci.yml

@@ -18,7 +18,7 @@ jobs:
           git clone --depth=1 --branch="${GITHUB_REF_NAME}" https://git.golfcards.club/alee/soosef.git "$GITHUB_WORKSPACE" || git clone --depth=1 https://git.golfcards.club/alee/soosef.git "$GITHUB_WORKSPACE"
       - run: pip install ruff black
       - name: Check formatting
-        run: black --check src/ tests/ frontends/
+        run: black --check --target-version py312 src/ tests/ frontends/
       - name: Lint
         run: ruff check src/ tests/ frontends/