feat: add maintenance module for message deletion and related utilities

feat: implement tests for maintenance functions and dashboard interactions
feat: add timezone and country tests for thctime module

tests/test_main_embed.py

@@ -0,0 +1,32 @@
+import main
+
+
+def test_create_embed_all_types(monkeypatch):
+    monkeypatch.setattr(main, "load_timezones", lambda: [
+        {"zone_name": "Etc/UTC", "country_code": "ZZ"}
+    ])
+    monkeypatch.setattr(main, "load_countries", lambda: [
+        {"country_code": "ZZ", "country_name": "Nowhere"}
+    ])
+
+    emb = main.create_embed("reminder")
+    assert emb["title"] == "Reminder"
+    assert "5 minute" in emb["description"]
+    assert emb["color"] == 0xE67E22
+
+    emb = main.create_embed("reminder_halftime")
+    assert emb["title"] == "Reminder halftime"
+    assert "Half-time in 5 minutes" in emb["description"]
+
+    monkeypatch.setattr(main, "where_is_it_420", lambda tzs, cs, **kwargs: [])
+    emb = main.create_embed("halftime")
+    assert emb["title"] == "Halftime"
+    assert emb["image"] is not None
+
+    monkeypatch.setattr(main, "where_is_it_420", lambda tzs, cs, **kwargs: [])
+    emb = main.create_embed("420")
+    assert emb["title"] == "420"
+    assert emb["image"] is not None
+
+    emb = main.create_embed("nope")
+    assert emb["description"] == "Unknown notification type"