fix(phone-image): T7 integration fixes

Fix 3 bugs found during Playwright integration testing:

1. Template syntax: {|json_encode|default='{}'} -> PHP native (curly braces parsed as TP6 tags)

2. jQuery event namespace mismatch: off('click.phoneImage') -> off('click') to match on('click')

3. Migration executed on server

All 6 Playwright test scenarios passed: layout, content flow, preview, alignment, font size, toolbar buttons

view/admin/post/phone_image.html

@@ -180,7 +180,7 @@
             };
 
             // 恢复之前保存的排版配置
-            var savedConfig = {$layoutConfig|json_encode|default="{}"};
+            var savedConfig = <?php echo $layoutConfig ? json_encode($layoutConfig) : '{}'; ?>;
             var initConfig = {
                 size: savedConfig.size || 'xiaohongshu',
                 fontSize: savedConfig.fontSize || 14,