fix: No longer displays edited on all messages and fix Disconnected from signaling server on multiple clients

toju-app/src/app/domains/chat/domain/rules/message.rules.spec.ts

@@ -0,0 +1,59 @@
+import {
+  describe,
+  it,
+  expect
+} from 'vitest';
+import type { Message } from '../../../../shared-kernel';
+import { shouldShowMessageEditedLabel } from './message.rules';
+
+function createMessage(overrides: Partial<Message> = {}): Message {
+  return {
+    id: 'message-1',
+    roomId: 'room-1',
+    senderId: 'user-1',
+    senderName: 'User 1',
+    content: 'hello',
+    timestamp: 1_000,
+    reactions: [],
+    isDeleted: false,
+    ...overrides
+  };
+}
+
+describe('message.rules', () => {
+  describe('shouldShowMessageEditedLabel', () => {
+    it('returns false for newly created messages without an edit revision', () => {
+      expect(shouldShowMessageEditedLabel(createMessage())).toBe(false);
+    });
+
+    it('returns false when editedAt equals the original timestamp (legacy create rows)', () => {
+      expect(shouldShowMessageEditedLabel(createMessage({
+        editedAt: 1_000,
+        timestamp: 1_000,
+        revision: 0
+      }))).toBe(false);
+    });
+
+    it('returns true when a message has an edit revision', () => {
+      expect(shouldShowMessageEditedLabel(createMessage({
+        editedAt: 2_000,
+        revision: 1
+      }))).toBe(true);
+    });
+
+    it('returns true for legacy edited messages with editedAt after timestamp', () => {
+      expect(shouldShowMessageEditedLabel(createMessage({
+        editedAt: 2_000,
+        timestamp: 1_000
+      }))).toBe(true);
+    });
+
+    it('returns false for deleted messages even when editedAt is set', () => {
+      expect(shouldShowMessageEditedLabel(createMessage({
+        editedAt: 2_000,
+        revision: 1,
+        isDeleted: true
+      }))).toBe(false);
+    });
+  });
+});