chore: simplify workflows and unify tool logging and mail presentation

tools/preview/engine.go

@@ -5,6 +5,7 @@ import (
 	"encoding/base64"
 	"encoding/json"
 	"fmt"
+	"gitea-mail-templates/tools/logging"
 	"html/template"
 	"os"
 	"path/filepath"
@@ -259,15 +260,15 @@ func WriteRenderedJS(result *PreviewResult, output string) error {
 }
 
 func PrintDetailedSummary(result *PreviewResult, _ string, _ *config.TemplatesConfig) {
-	fmt.Printf("[PASS] %s: %d themes × %d mail types × %d languages\n", result.Upstream, len(result.Themes), len(result.Registry), len(result.Languages))
+	logging.Info("Preview", "%s: %d themes × %d mail types × %d languages", result.Upstream, len(result.Themes), len(result.Registry), len(result.Languages))
 	for _, lang := range result.Languages {
 		for _, warnings := range result.Warnings[lang] {
 			for _, warning := range warnings {
-				fmt.Println(warning)
+				logging.Warn("Upstream", "%s", strings.TrimPrefix(warning, "[UPSTREAM-WARN] "))
 			}
 		}
 		if keys := result.Fallback[lang]; len(keys) > 0 {
-			fmt.Printf("[FALLBACK] %s -> en-US: %s\n", lang, strings.Join(keys, ", "))
+			logging.Warn("Locale", "%s -> en-US: %s", lang, strings.Join(keys, ", "))
 		}
 	}
 }

tools/preview/server.go

@@ -3,6 +3,7 @@ package preview
 import (
 	"encoding/json"
 	"fmt"
+	"gitea-mail-templates/tools/logging"
 	"net/http"
 	"os"
 	"path/filepath"
@@ -62,10 +63,10 @@ func (s *DevServer) Start() error {
 	mux.Handle("/", previewFS)
 
 	addr := fmt.Sprintf("127.0.0.1:%d", s.cfg.Port)
-	fmt.Printf("\033[32m[I]\033[0m [Server] Gitea Mail Templates — Dev Server\n")
-	fmt.Printf("\033[32m[I]\033[0m [Server] http://%s\n", addr)
-	fmt.Printf("\033[32m[I]\033[0m [Watcher] Watching theme CSS, framework, lock/cache and fixtures\n")
-	fmt.Printf("\033[32m[I]\033[0m [Server] SSE endpoint http://%s/events\n\n", addr)
+	logging.Info("Server", "Gitea Mail Templates — Dev Server")
+	logging.Info("Server", "http://%s", addr)
+	logging.Info("Watcher", "Watching theme CSS, framework, lock/cache and fixtures")
+	logging.Info("Server", "SSE endpoint http://%s/events", addr)
 
 	return http.ListenAndServe(addr, mux)
 }
@@ -207,18 +208,20 @@ func (s *DevServer) watchThemes() {
 				last, ok := s.lastMods[path]
 				if !ok || mod.After(last) {
 					rel, _ := filepath.Rel(s.cfg.ThemesDir, path)
-					fmt.Printf("\033[32m[I]\033[0m [Watcher] %s changed\n", filepath.ToSlash(rel))
+					logging.Info("Watcher", "%s changed", filepath.ToSlash(rel))
 				}
 			}
 			for path := range s.lastMods {
 				if _, ok := current[path]; !ok {
 					rel, _ := filepath.Rel(s.cfg.ThemesDir, path)
-					fmt.Printf("\033[32m[I]\033[0m [Watcher] %s deleted\n", filepath.ToSlash(rel))
+					logging.Info("Watcher", "%s deleted", filepath.ToSlash(rel))
 				}
 			}
 			s.lastMods = current
 			s.modsMu.Unlock()
-			s.rebuildAll()
+			if err := s.rebuildAll(); err != nil {
+				logging.Error("Builder", "Rebuild failed: %v", err)
+			}
 		} else {
 			s.modsMu.Unlock()
 		}
@@ -234,7 +237,7 @@ func (s *DevServer) rebuildAll() error {
 	defer rebuildMu.Unlock()
 
 	start := time.Now()
-	fmt.Printf("\033[32m[I]\033[0m [Builder] Rebuilding all themes...\n")
+	logging.Info("Builder", "Rebuilding all themes...")
 
 	cfg, err := config.Load(filepath.Join(filepath.Dir(s.cfg.ThemesDir), "tools", "data", "templates_config.json"))
 	if err != nil {
@@ -254,7 +257,7 @@ func (s *DevServer) rebuildAll() error {
 	}
 
 	elapsed := time.Since(start)
-	fmt.Printf("\033[32m[I]\033[0m [Builder] Rebuild done in %v\n", elapsed.Round(time.Millisecond))
+	logging.Info("Builder", "Rebuild done in %v", elapsed.Round(time.Millisecond))
 
 	s.broadcast("reload", map[string]interface{}{"elapsed": elapsed.Milliseconds()})
 	return nil