feat: show shared chats in agents sidebar (#26056)

coderd/database/db2sdk/db2sdk.go

@@ -1763,6 +1763,7 @@ func Chat(c database.Chat, diffStatus *database.ChatDiffStatus, files []database
 		Title:             c.Title,
 		Status:            codersdk.ChatStatus(c.Status),
 		Archived:          c.Archived,
+		Shared:            len(c.UserACL) > 0 || len(c.GroupACL) > 0,
 		PinOrder:          c.PinOrder,
 		CreatedAt:         c.CreatedAt,
 		UpdatedAt:         c.UpdatedAt,

coderd/database/db2sdk/db2sdk_test.go

@@ -947,6 +947,7 @@ func TestChat_AllFieldsPopulated(t *testing.T) {
 		CreatedAt:         now,
 		UpdatedAt:         now,
 		Archived:          true,
+		UserACL:           database.ChatACL{uuid.NewString(): database.ChatACLEntry{}},
 		PinOrder:          1,
 		PlanMode:          database.NullChatPlanMode{ChatPlanMode: database.ChatPlanModePlan, Valid: true},
 		MCPServerIDs:      []uuid.UUID{uuid.New()},
@@ -1005,6 +1006,58 @@ func TestChat_AllFieldsPopulated(t *testing.T) {
 	}
 }
 
+func TestChat_Shared(t *testing.T) {
+	t.Parallel()
+
+	testCases := []struct {
+		name     string
+		userACL  database.ChatACL
+		groupACL database.ChatACL
+		expected bool
+	}{
+		{
+			name: "not shared",
+		},
+		{
+			name:     "user ACL",
+			userACL:  database.ChatACL{uuid.NewString(): database.ChatACLEntry{}},
+			expected: true,
+		},
+		{
+			name:     "group ACL",
+			groupACL: database.ChatACL{uuid.NewString(): database.ChatACLEntry{}},
+			expected: true,
+		},
+		{
+			name:     "user and group ACLs",
+			userACL:  database.ChatACL{uuid.NewString(): database.ChatACLEntry{}},
+			groupACL: database.ChatACL{uuid.NewString(): database.ChatACLEntry{}},
+			expected: true,
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			t.Parallel()
+
+			chat := database.Chat{
+				ID:                uuid.New(),
+				OwnerID:           uuid.New(),
+				LastModelConfigID: uuid.New(),
+				Title:             tc.name,
+				Status:            database.ChatStatusWaiting,
+				CreatedAt:         dbtime.Now(),
+				UpdatedAt:         dbtime.Now(),
+				UserACL:           tc.userACL,
+				GroupACL:          tc.groupACL,
+			}
+
+			got := db2sdk.Chat(chat, nil, nil)
+			require.Equal(t, tc.expected, got.Shared)
+		})
+	}
+}
+
 func TestChat_FileMetadataConversion(t *testing.T) {
 	t.Parallel()