ci: add GitHub Actions workflow (byte-compile + smoke tests)

Author: Sanjays2402

.github/workflows/ci.yml

@@ -0,0 +1,31 @@
+name: CI
+
+on:
+  push:
+    branches: [main, "feat/**", "fix/**"]
+  pull_request:
+    branches: [main]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: "3.11"
+
+      - name: Install lightweight deps (no TensorFlow in CI)
+        run: |
+          python -m pip install --upgrade pip
+          pip install flask numpy Pillow pytest
+
+      - name: Byte-compile sources
+        run: python -m compileall app.py
+
+      - name: Run smoke tests (TensorFlow mocked)
+        env:
+          PYTHONPATH: .
+        run: pytest -q