fix: connect EmailService to contact form handler

The contact form was logging submissions but never actually sending emails.
This commit:
- Adds EmailService field to CVHandler
- Initializes EmailService in main.go with SMTP config
- Calls SendContactForm in HandleContact handler
- Updates all test files to pass nil for emailService parameter

internal/handlers/cv_text_test.go

@@ -30,7 +30,7 @@ func TestPlainText(t *testing.T) {
 		t.Fatalf("Failed to create template manager: %v", err)
 	}
 
-	handler := NewCVHandler(tmplManager, "localhost:8080")
+	handler := NewCVHandler(tmplManager, "localhost:8080", nil)
 
 	tests := []struct {
 		name           string
@@ -152,7 +152,7 @@ func TestPlainTextDownloadFilename(t *testing.T) {
 		t.Fatalf("Failed to create template manager: %v", err)
 	}
 
-	handler := NewCVHandler(tmplManager, "localhost:8080")
+	handler := NewCVHandler(tmplManager, "localhost:8080", nil)
 
 	tests := []struct {
 		name         string