diff --git a/internal/common/pagination.go b/internal/common/pagination.go
index ae2ff22..f566d71 100644
--- a/internal/common/pagination.go
+++ b/internal/common/pagination.go
@@ -23,5 +23,31 @@ func (p *Pagination) Offset() int {
 	return (p.Page - 1) * p.PageSize
 }
 
+// TotalPages 根据 total 计算总页数
+func (p *Pagination) TotalPages(total int64) int {
+	if total == 0 {
+		return 0
+	}
+	return int((total + int64(p.PageSize) - 1) / int64(p.PageSize))
+}
+
+// PrevPage 上一页（最小为 1）
+func (p *Pagination) PrevPage() int {
+	prev := p.Page - 1
+	if prev < 1 {
+		return 1
+	}
+	return prev
+}
+
+// NextPage 下一页（最大为 totalPages）
+func (p *Pagination) NextPage(totalPages int) int {
+	next := p.Page + 1
+	if next > totalPages {
+		return totalPages
+	}
+	return next
+}
+
 // 固定时间格式，前后端统一
 const TimeFormat = time.RFC3339
diff --git a/internal/controller/admin/admin_post_controller.go b/internal/controller/admin/admin_post_controller.go
index 919ac14..2b05ad4 100644
--- a/internal/controller/admin/admin_post_controller.go
+++ b/internal/controller/admin/admin_post_controller.go
@@ -43,11 +43,7 @@ func (ctrl *AdminPostController) PostsPage(c *gin.Context) {
 
 	p := common.Pagination{Page: page, PageSize: pageSize}
 	p.DefaultPagination()
-	totalPages := int((total + int64(p.PageSize) - 1) / int64(p.PageSize))
-	prevPage := p.Page - 1
-	if prevPage < 1 { prevPage = 1 }
-	nextPage := p.Page + 1
-	if nextPage > totalPages { nextPage = totalPages }
+	totalPages := p.TotalPages(total)
 
 	c.HTML(http.StatusOK, "admin/posts/index.html", common.BuildAdminPageData(c, gin.H{
 		"Title":       "内容管理",
@@ -55,8 +51,8 @@ func (ctrl *AdminPostController) PostsPage(c *gin.Context) {
 		"Total":       total,
 		"Page":        p.Page,
 		"TotalPages":  totalPages,
-		"PrevPage":    prevPage,
-		"NextPage":    nextPage,
+		"PrevPage":    p.PrevPage(),
+		"NextPage":    p.NextPage(totalPages),
 		"Keyword":     keyword,
 		"Status":      status,
 		"StatusNames": model.PostStatusDisplayNames,
diff --git a/internal/controller/post_controller.go b/internal/controller/post_controller.go
index df14921..4b9d65c 100644
--- a/internal/controller/post_controller.go
+++ b/internal/controller/post_controller.go
@@ -49,11 +49,7 @@ func (ctrl *PostController) ListPage(c *gin.Context) {
 
 	p := common.Pagination{Page: page, PageSize: pageSize}
 	p.DefaultPagination()
-	totalPages := int((total + int64(p.PageSize) - 1) / int64(p.PageSize))
-	prevPage := p.Page - 1
-	if prevPage < 1 { prevPage = 1 }
-	nextPage := p.Page + 1
-	if nextPage > totalPages { nextPage = totalPages }
+	totalPages := p.TotalPages(total)
 
 	c.HTML(http.StatusOK, "posts/index.html", common.BuildPageData(c, gin.H{
 		"Title":      "社区帖子",
@@ -61,8 +57,8 @@ func (ctrl *PostController) ListPage(c *gin.Context) {
 		"Total":      total,
 		"Page":       p.Page,
 		"TotalPages": totalPages,
-		"PrevPage":   prevPage,
-		"NextPage":   nextPage,
+		"PrevPage":   p.PrevPage(),
+		"NextPage":   p.NextPage(totalPages),
 		"Keyword":    keyword,
 		"ExtraCSS":   "/static/css/posts.css",
 	}))
@@ -276,12 +272,30 @@ func (ctrl *PostController) Delete(c *gin.Context) {
 
 // Submit API 提交审核
 func (ctrl *PostController) Submit(c *gin.Context) {
+	uidObj, _ := c.Get("uid")
+	uid, ok := uidObj.(uint)
+	if !ok {
+		common.Error(c, http.StatusUnauthorized, "请先登录")
+		return
+	}
+
 	id, err := strconv.ParseUint(c.Param("id"), 10, 64)
 	if err != nil {
 		common.Error(c, http.StatusBadRequest, "无效的帖子 ID")
 		return
 	}
 
+	// 权限检查：仅帖子作者可提交审核
+	post, err := ctrl.postService.GetByID(uint(id))
+	if err != nil {
+		common.Error(c, http.StatusNotFound, "帖子不存在")
+		return
+	}
+	if post.UserID != uid {
+		common.Error(c, http.StatusForbidden, "无权操作此帖子")
+		return
+	}
+
 	if err := ctrl.postService.SubmitForAudit(uint(id)); err != nil {
 		if errors.Is(err, common.ErrPostCannotSubmit) || errors.Is(err, common.ErrPostNotFound) {
 			common.Error(c, http.StatusBadRequest, err.Error())
@@ -312,13 +326,12 @@ func (ctrl *PostController) ListAPI(c *gin.Context) {
 
 	p := common.Pagination{Page: page, PageSize: pageSize}
 	p.DefaultPagination()
-	totalPages := int((total + int64(p.PageSize) - 1) / int64(p.PageSize))
 
 	common.Ok(c, model.PostListResult{
 		Items:      posts,
 		Total:      total,
 		Page:       p.Page,
-		TotalPages: totalPages,
+		TotalPages: p.TotalPages(total),
 	})
 }
 
diff --git a/templates/MetaLab-2026/static/js/editor.js b/templates/MetaLab-2026/static/js/editor.js
index 971d0af..333bd75 100644
--- a/templates/MetaLab-2026/static/js/editor.js
+++ b/templates/MetaLab-2026/static/js/editor.js
@@ -17,6 +17,7 @@ import { common, createLowlight } from 'lowlight'
 let editor = null
 let currentHTML = ''
 let draftTimer = null
+let submitting = false
 
 // ---- 初始化 ----
 document.addEventListener('DOMContentLoaded', () => {
@@ -337,25 +338,34 @@ function handleKeyboard(e) {
 async function handleSubmit(e) {
     e.preventDefault()
 
-    const postId = document.getElementById('postId')?.value
-    const title = document.getElementById('postTitle')?.value.trim()
+    if (submitting) return
+    submitting = true
 
-    if (!title) { alert('请输入标题'); return }
-
-    // 获取编辑器 HTML 内容
-    const body = editor ? editor.getHTML() : ''
-    // 忽略空段落
-    const cleanBody = body === '<p></p>' ? '' : body
-    if (!cleanBody.trim()) { alert('请输入正文'); return }
-
-    const isEdit = !!postId
-    const url = isEdit ? '/api/posts/' + postId : '/api/posts'
-    const method = isEdit ? 'PUT' : 'POST'
-
-    const csrfMeta = document.querySelector('meta[name="csrf-token"]')
-    const csrf = csrfMeta ? csrfMeta.getAttribute('content') : ''
+    const submitBtn = document.querySelector('.btn-submit')
+    if (submitBtn) {
+        submitBtn.disabled = true
+        submitBtn.textContent = '提交中...'
+    }
 
     try {
+        const postId = document.getElementById('postId')?.value
+        const title = document.getElementById('postTitle')?.value.trim()
+
+        if (!title) { alert('请输入标题'); return }
+
+        // 获取编辑器 HTML 内容
+        const body = editor ? editor.getHTML() : ''
+        // 忽略空段落
+        const cleanBody = body === '<p></p>' ? '' : body
+        if (!cleanBody.trim()) { alert('请输入正文'); return }
+
+        const isEdit = !!postId
+        const url = isEdit ? '/api/posts/' + postId : '/api/posts'
+        const method = isEdit ? 'PUT' : 'POST'
+
+        const csrfMeta = document.querySelector('meta[name="csrf-token"]')
+        const csrf = csrfMeta ? csrfMeta.getAttribute('content') : ''
+
         const resp = await fetch(url, {
             method,
             headers: {
@@ -380,5 +390,12 @@ async function handleSubmit(e) {
         } else {
             alert('请求失败，请重试')
         }
+    } finally {
+        submitting = false
+        if (submitBtn) {
+            submitBtn.disabled = false
+            submitBtn.textContent = submitBtn.textContent === '提交中...' ?
+                (document.getElementById('postId')?.value ? '保存修改' : '发布帖子') : submitBtn.textContent
+        }
     }
 }