Fix page spacing and add daily poetry with manual write testing

tests/test_poetry.py

@@ -0,0 +1,53 @@
+from io import BytesIO
+
+import pytest
+from PIL import Image
+
+from pigway_frame_flow.providers.poetry import catalog, get_poem
+
+
+def test_daily_selection_is_stable_and_changes_next_day():
+    today = get_poem("2026-10-02")
+    assert today == get_poem("2026-10-02")
+    assert today["id"] != get_poem("2026-10-03")["id"]
+    assert len({p["id"] for p in catalog()}) == 20
+
+
+@pytest.mark.parametrize("profile", ["color", "grayscale"])
+def test_poetry_native_size(service, profile):
+    image = Image.open(BytesIO(service.renderer.render("daily-poetry", {}, profile)))
+    assert image.size == (1200, 1600)
+
+
+def test_selected_poem_and_custom_poem(service):
+    selected = service.renderer.resolve("daily-poetry", {"poem_id": "jing-ye-si"})
+    assert selected["poem_title"] == "静夜思" and selected["poem_author"] == "李白"
+    custom = service.renderer.resolve(
+        "daily-poetry", {"poem_title": "Custom", "poem_lines": "User text"}
+    )
+    assert custom["poem_title"] == "Custom" and custom["poem_lines"] == "User text"
+
+
+def test_poetry_api_validation(client):
+    assert client.get("/api/v1/providers/poetry").status_code == 200
+    assert client.get("/api/v1/providers/poetry?date=wrong").status_code == 400
+    assert client.get("/api/v1/providers/poetry?poem_id=missing").status_code == 400
+
+
+def test_poetry_does_not_fetch_unrelated_weather(service):
+    def unwanted():
+        raise AssertionError("Poetry must not fetch weather")
+
+    service.renderer.weather.get_current = unwanted
+    assert service.renderer.render("daily-poetry", {})
+
+
+def test_final_write_gate_blocks_queued_writes(service):
+    from pigway_frame_flow.errors import FlowError
+
+    service.settings.mock = False
+    service.settings.write_enabled = False
+    with pytest.raises(FlowError):
+        service._start_write("queued-operation")
+    # Disabled writes leave pending override restoration intact.
+    service.expire()