fix(contacts): emit vCard 3.0 photo parameters for CardDAV clients (bug 5134)

setPhoto wrote ENCODING=BASE64, the vCard 2.1 spelling, inside cards
announced as VERSION:3.0. Strict CardDAV parsers such as Apple Contacts
drop the property, so LDAP directory photos (jpegPhoto) never displayed
on those clients.

Emit TYPE=JPEG;ENCODING=b as of RFC 2426. The parser already accepts
both encodings, and legacy ENCODING=BASE64 cards keep decoding.

https://bugs.sogo.nu/view.php?id=5134

SOPE/NGCards/NGVCard.m

@@ -296,8 +296,10 @@
 - (void) setPhoto: (NSString *) _value
 {
   CardElement *photo;
+
   photo = [self uniqueChildWithTag: @"photo"];
-  [photo setValue: 0 ofAttribute: @"encoding" to: @"BASE64"];
+  [photo setValue: 0 ofAttribute: @"type" to: @"JPEG"];
+  [photo setValue: 0 ofAttribute: @"encoding" to: @"b"];
 
   [photo setSingleValue: _value forKey: @""];
 }

SOPE/NGCards/Tests/GNUmakefile

@@ -0,0 +1,20 @@
+# GNUstep makefile
+
+include ../../../config.make
+include $(GNUSTEP_MAKEFILES)/common.make
+
+TEST_TOOL = ngcards-tests
+$(TEST_TOOL)_OBJC_FILES = \
+	TestNGVCardPhoto.m
+
+TEST_TOOL_NAME = $(TEST_TOOL)
+
+$(TEST_TOOL)_CPPFLAGS += \
+	-Wall -D_GNU_SOURCE -I..
+
+ADDITIONAL_LIB_DIRS += \
+	-L../obj -lNGCards \
+	-lNGExtensions -lSaxObjC -lNGStreams -lDOM -lEOControl -lobjc \
+	-Wl,-rpath,../obj
+
+include $(GNUSTEP_MAKEFILES)/test-tool.make

SOPE/NGCards/Tests/TestNGVCardPhoto.m

@@ -0,0 +1,73 @@
+/* TestNGVCardPhoto.m - this file is part of SOGo
+ *
+ * Copyright (C) 2026 Inverse inc.
+ *
+ * This file is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This file is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include <Foundation/Foundation.h>
+#include <stdio.h>
+
+#include "NGVCard.h"
+
+static int
+Check (int condition, const char *message)
+{
+  if (!condition)
+    {
+      printf ("FAIL: %s\n", message);
+      return 1;
+    }
+
+  return 0;
+}
+
+int
+main (void)
+{
+  NSAutoreleasePool *pool;
+  NGVCard *card;
+  NSString *versit;
+  int failures = 0;
+
+  pool = [[NSAutoreleasePool alloc] init];
+
+  card = [NGVCard cardWithUid: @"photo-test"];
+  [card setPhoto: @"QUJDRA=="];
+
+  versit = [card versitString];
+  failures += Check ([versit rangeOfString: @"ENCODING=b"].location
+                     != NSNotFound,
+                     "photo must use the vCard 3.0 ENCODING=b value");
+  failures += Check ([versit rangeOfString: @"TYPE=JPEG"].location
+                     != NSNotFound,
+                     "photo must declare its TYPE");
+  failures += Check ([versit rangeOfString: @"ENCODING=BASE64"].location
+                     == NSNotFound,
+                     "the 2.1 ENCODING=BASE64 spelling must not be emitted");
+  failures += Check ([versit rangeOfString: @"QUJDRA=="].location
+                     != NSNotFound,
+                     "photo value must be preserved");
+
+  [pool release];
+
+  if (failures)
+    printf ("%d failure(s)\n", failures);
+  else
+    printf ("all tests passed\n");
+
+  return failures ? 1 : 0;
+}