feat: pool handlers + aiohttp routes

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tests/test_routes_logic.py

@@ -0,0 +1,23 @@
+import io
+from PIL import Image
+from gates import handlers
+
+
+def _png_bytes(color=(1, 2, 3)):
+    b = io.BytesIO(); Image.new("RGB", (4, 4), color).save(b, "PNG"); return b.getvalue()
+
+
+def test_handle_add_then_list(tmp_path):
+    base = str(tmp_path)
+    m = handlers.handle_add(base, "p1", _png_bytes(), "png", ts=5)
+    assert len(m["slots"]) == 1
+    assert handlers.handle_list(base, "p1")["slots"][0]["image"] == "img_0001.png"
+
+
+def test_handle_active_label_remove(tmp_path):
+    base = str(tmp_path)
+    handlers.handle_add(base, "p1", _png_bytes(), "png", ts=1)
+    handlers.handle_add(base, "p1", _png_bytes(), "png", ts=2)
+    assert handlers.handle_active(base, "p1", 1)["active"] == 1
+    assert handlers.handle_label(base, "p1", 0, "hi")["slots"][0]["label"] == "hi"
+    assert len(handlers.handle_remove(base, "p1", 0)["slots"]) == 1