chore: migrate mail themes to shared framework and locked upstream inputs

tools/preview/server.go

@@ -22,7 +22,7 @@ type DevServerConfig struct {
 }
 
 // DevServer is a live-reload dev server with SSE-based browser notifications.
-// It serves preview/ as static files, watches themes/ for .tmpl changes,
+// It serves preview/ as static files, watches theme resources and snapshots,
 // re-renders templates in-process, and pushes reload events to connected browsers.
 type DevServer struct {
 	cfg      DevServerConfig
@@ -46,7 +46,7 @@ func NewDevServer(cfg DevServerConfig) *DevServer {
 func (s *DevServer) Start() error {
 	// Build initial rendered.js
 	if err := s.rebuildAll(); err != nil {
-		fmt.Fprintf(os.Stderr, "\033[33m[W]\033[0m [Builder] Initial render warning: %v\n", err)
+		return fmt.Errorf("initial preview build: %w", err)
 	}
 
 	// Start file watcher in background
@@ -61,11 +61,11 @@ func (s *DevServer) Start() error {
 	previewFS := http.FileServer(http.Dir(s.cfg.PreviewDir))
 	mux.Handle("/", previewFS)
 
-	addr := fmt.Sprintf(":%d", s.cfg.Port)
+	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://localhost%s\n", addr)
-	fmt.Printf("\033[32m[I]\033[0m [Watcher] Watching themes/ for changes\n")
-	fmt.Printf("\033[32m[I]\033[0m [Server] SSE endpoint ws://localhost%s/events\n\n", addr)
+	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)
 
 	return http.ListenAndServe(addr, mux)
 }
@@ -131,19 +131,42 @@ func (s *DevServer) broadcast(typ string, payload map[string]interface{}) {
 
 // --- File watcher (polling) ---
 
-// scanMods scans themes/ for .tmpl files and returns a map of path → mod time.
+// scanMods records theme resources, snapshot files and fixture modification times.
 func (s *DevServer) scanMods() (map[string]time.Time, error) {
 	mods := make(map[string]time.Time)
 	err := filepath.Walk(s.cfg.ThemesDir, func(path string, info os.FileInfo, err error) error {
 		if err != nil {
 			return nil // skip unreadable
 		}
-		if !info.IsDir() && strings.HasSuffix(info.Name(), ".tmpl") {
+		if !info.IsDir() && (strings.HasSuffix(info.Name(), ".json") || strings.HasSuffix(info.Name(), ".css") || strings.HasSuffix(info.Name(), ".html")) {
 			mods[path] = info.ModTime()
 		}
 		return nil
 	})
-	return mods, err
+	if err != nil {
+		return mods, err
+	}
+	for _, dir := range []string{filepath.Join(filepath.Dir(s.cfg.ThemesDir), "framework"), filepath.Join(filepath.Dir(s.cfg.ThemesDir), "build", "upstream"), filepath.Join(filepath.Dir(s.cfg.ThemesDir), "tools", "data")} {
+		err = filepath.Walk(dir, func(path string, info os.FileInfo, err error) error {
+			if err != nil {
+				return err
+			}
+			if !info.IsDir() {
+				mods[path] = info.ModTime()
+			}
+			return nil
+		})
+		if err != nil {
+			return mods, err
+		}
+	}
+	lock := filepath.Join(filepath.Dir(s.cfg.ThemesDir), "gitea.lock.json")
+	if info, err := os.Stat(lock); err == nil {
+		mods[lock] = info.ModTime()
+	} else {
+		return mods, err
+	}
+	return mods, nil
 }
 
 // watchThemes polls the themes directory every 500ms and triggers rebuild on changes.
@@ -213,9 +236,13 @@ func (s *DevServer) rebuildAll() error {
 	start := time.Now()
 	fmt.Printf("\033[32m[I]\033[0m [Builder] Rebuilding all themes...\n")
 
-	result := RenderAll(s.cfg.ThemesDir, s.cfg.Config, nil)
-	if result == nil {
-		err := fmt.Errorf("no results produced")
+	cfg, err := config.Load(filepath.Join(filepath.Dir(s.cfg.ThemesDir), "tools", "data", "templates_config.json"))
+	if err != nil {
+		s.broadcast("error", map[string]interface{}{"message": err.Error()})
+		return err
+	}
+	result, err := RenderAll(s.cfg.ThemesDir, cfg, nil)
+	if err != nil {
 		s.broadcast("error", map[string]interface{}{"message": err.Error()})
 		return err
 	}