初始提交：姜十三论坛 Jiang13 Forum

轻量自用论坛，Go 单二进制 + React SPA 内嵌 + SQLite。

Co-authored-by: Cursor <cursoragent@cursor.com>

embed_static/embed.go

@@ -0,0 +1,73 @@
+package embed_static
+
+import (
+	"embed"
+	"html/template"
+	"io/fs"
+	"net/http"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+)
+
+//go:embed static/*
+var staticFS embed.FS
+
+//go:embed templates/*
+var templatesFS embed.FS
+
+// SetupEmbed 配置内嵌资源：SPA 前端 + 后台 HTML 模板
+func SetupEmbed(r *gin.Engine) error {
+	tmpl, err := LoadTemplates()
+	if err != nil {
+		return err
+	}
+	r.SetHTMLTemplate(tmpl)
+
+	// React SPA 构建产物（Vite）
+	if sub, err := fs.Sub(staticFS, "static/spa/assets"); err == nil {
+		r.GET("/assets/*filepath", gin.WrapH(http.StripPrefix("/assets", http.FileServer(http.FS(sub)))))
+	}
+
+	// 后台管理遗留静态资源
+	if sub, err := fs.Sub(staticFS, "static/legacy"); err == nil {
+		r.GET("/legacy/*filepath", gin.WrapH(http.StripPrefix("/legacy", http.FileServer(http.FS(sub)))))
+	}
+
+	return nil
+}
+
+// ServeSPA 返回 React SPA 入口
+func ServeSPA(c *gin.Context) {
+	data, err := staticFS.ReadFile("static/spa/index.html")
+	if err != nil {
+		c.String(http.StatusNotFound, "前端未构建，请运行: cd frontend && npm run build")
+		return
+	}
+	c.Data(http.StatusOK, "text/html; charset=utf-8", data)
+}
+
+// IsSPARoute 判断是否应由 SPA 处理
+func IsSPARoute(path string) bool {
+	if strings.HasPrefix(path, "/api") ||
+		strings.HasPrefix(path, "/admin") ||
+		strings.HasPrefix(path, "/uploads") ||
+		strings.HasPrefix(path, "/legacy") ||
+		strings.HasPrefix(path, "/assets") {
+		return false
+	}
+	return true
+}
+
+func LoadTemplates() (*template.Template, error) {
+	sub, err := fs.Sub(templatesFS, "templates")
+	if err != nil {
+		return nil, err
+	}
+	tmpl := template.New("").Funcs(template.FuncMap{
+		"safeHTML": func(s string) template.HTML { return template.HTML(s) },
+		"add":      func(a, b int) int { return a + b },
+		"sub":      func(a, b int) int { return a - b },
+	})
+	return tmpl.ParseFS(sub, "*.html", "admin/*.html")
+}