Activate venvs in CI and update requires-python to >=3.12.10

Fix CI failures where `uv run` re-resolved dependencies against
requires-python>=3.9, conflicting with grf-py's >=3.12.10 requirement.

- Activate venv via GITHUB_ENV/GITHUB_PATH so subsequent steps use it
- Update requires-python to >=3.12.10 to match grf-py requirement
- Use direct pytest/make commands since venv is activated

Co-authored-by: ahyangyi <700956+ahyangyi@users.noreply.github.com>
Agent-Logs-Url: https://github.com/ahyangyi/agrf/sessions/50cc3807-9657-4883-befe-6f5c5e55cadb

Author: Copilot

.github/workflows/build.yml

@@ -17,8 +17,11 @@ jobs:
         uses: astral-sh/setup-uv@v4
       - name: Set up Python 3.12.10
         run: uv python install 3.12.10
-      - name: Create virtual environment
-        run: uv venv --python 3.12.10
+      - name: Create and activate virtual environment
+        run: |
+          uv venv --python 3.12.10
+          echo "VIRTUAL_ENV=$PWD/.venv" >> $GITHUB_ENV
+          echo "$PWD/.venv/bin" >> $GITHUB_PATH
       - name: Install dependencies
         run: uv pip install .
       - name: Build

.github/workflows/sphinx-gh-pages.yml

@@ -31,14 +31,17 @@ jobs:
     - name: Set up Python 3.12.10
       run: uv python install 3.12.10
 
-    - name: Create virtual environment
-      run: uv venv --python 3.12.10
+    - name: Create and activate virtual environment
+      run: |
+        uv venv --python 3.12.10
+        echo "VIRTUAL_ENV=$PWD/.venv" >> $GITHUB_ENV
+        echo "$PWD/.venv/bin" >> $GITHUB_PATH
 
     - name: Install dependencies
       run: uv pip install ".[doc]"
 
     - name: Build documentation
-      run: uv run make doc
+      run: make doc
 
     - name: Setup Pages
       uses: actions/configure-pages@v5

.github/workflows/unit-tests.yml

@@ -30,9 +30,12 @@ jobs:
         uses: astral-sh/setup-uv@v4
       - name: Set up Python 3.12.10
         run: uv python install 3.12.10
-      - name: Create virtual environment
-        run: uv venv --python 3.12.10
+      - name: Create and activate virtual environment
+        run: |
+          uv venv --python 3.12.10
+          echo "VIRTUAL_ENV=$PWD/.venv" >> $GITHUB_ENV
+          echo "$PWD/.venv/bin" >> $GITHUB_PATH
       - name: Install dependencies
         run: uv pip install ".[test]"
       - name: Test agrf with coverage
-        run: uv run pytest
+        run: pytest

pyproject.toml

@@ -6,7 +6,7 @@ authors = [
 ]
 description = "Ahyangyi's OpenTTD NewGRF Toolkit"
 readme = "README.md"
-requires-python = ">=3.9"
+requires-python = ">=3.12.10"
 classifiers = [
     "Development Status :: 3 - Alpha",
     "Programming Language :: Python :: 3",