feat: disable user messaging and retain公益 service guidance

tests/miniapp/no_user_im_contract_test.py

@@ -0,0 +1,28 @@
+import json
+from pathlib import Path
+
+
+ROOT = Path(__file__).parents[2]
+
+
+def test_miniapp_has_no_user_chat_pages_or_message_tab():
+    app = json.loads((ROOT / "miniapp" / "app.json").read_text(encoding="utf-8"))
+    assert not any(page in {"pages/messages/messages", "pages/chat/chat"} for page in app["pages"])
+    assert not any(item.get("pagePath") == "pages/messages/messages" for item in app["tabBar"]["list"])
+
+
+def test_match_success_does_not_create_or_return_conversation():
+    like = (ROOT / "backend/src/main/java/com/danyang/match/platform/match/controller/LikeController.java").read_text(encoding="utf-8")
+    relationship = (ROOT / "backend/src/main/java/com/danyang/match/platform/relationship/service/RelationshipService.java").read_text(encoding="utf-8")
+    assert "matchedConversationId" not in like
+    assert "getOrCreateConversation" not in like
+    assert "conversationAutoCreated" not in relationship
+
+
+def test_chat_transport_is_disabled_at_backend_boundary():
+    guard = ROOT / "backend/src/main/java/com/danyang/match/platform/chat/config/ChatDisabledFilter.java"
+    assert guard.exists()
+    source = guard.read_text(encoding="utf-8")
+    assert "/conversations" in source
+    assert "/ws/chat" in source
+    assert "CHAT_DISABLED" in source