feat: add template data annotations and update styles for email templates

internal/service/email/templates/layout.gohtml

@@ -1,3 +1,4 @@
+{{- /*gotype: likedream-goframe/internal/service/email.BaseTemplateData*/ -}}
 {{define "layout"}}
 <!DOCTYPE html>
 <html>

internal/service/email/templates/signup_confirm.gohtml

@@ -1,13 +1,15 @@
+{{- /*gotype: likedream-goframe/internal/service/email.SignupTemplateData*/ -}}
+
 {{template "layout" .}}
 
 {{define "extra-styles"}}
-    <style>
+        <style>
         .feature-list {
-            background: linear-gradient(135deg, #f8faff 0%, #f1f5f9 100%);
-            border-radius: 12px;
-            padding: 25px;
-            margin: 25px 0;
+            background: linear-gradient(90deg, #f5f7fa 0%, #c3cfe2 100%);
+            border-radius: 8px;
+            padding: 20px 24px;
             border-left: 4px solid #667eea;
+            margin: 24px 0;
         }
 
         .feature-list ul {
@@ -16,9 +18,8 @@
         }
 
         .feature-list li {
-            padding: 8px 0;
             position: relative;
-            padding-left: 30px;
+            padding: 8px 0 8px 30px;
             font-size: 15px;
         }
 

internal/service/email/templates/task_notification.gohtml

@@ -1,3 +1,4 @@
+{{- /*gotype:likedream-goframe/internal/service/email.TaskNotificationTemplateData*/ -}}
 {{template "layout" .}}
 
 {{define "extra-styles"}}