diff --git a/src/web/components/posts.ts b/src/web/components/posts.ts
index 50da3be..03c8a73 100644
--- a/src/web/components/posts.ts
+++ b/src/web/components/posts.ts
@@ -3,6 +3,17 @@ import { renderMarkdown } from '../lib/markdown'
 import { renderDiscussion, loadDiscussionPosts } from './discussion'
 import { getCurrentLang } from './mode-tabs'
 
+// Extract text content from post content (handles both string and object formats)
+function getContentText(content: unknown): string {
+  if (!content) return ''
+  if (typeof content === 'string') return content
+  if (typeof content === 'object' && content !== null) {
+    const obj = content as Record<string, unknown>
+    if (typeof obj.text === 'string') return obj.text
+  }
+  return ''
+}
+
 // Format date as yyyy/mm/dd
 function formatDate(dateStr: string): string {
   const d = new Date(dateStr)
@@ -52,7 +63,8 @@ export function renderPostDetail(
   collection: string,
   isOwner: boolean = false,
   siteUrl?: string,
-  appUrl: string = 'https://bsky.app'
+  appUrl: string = 'https://bsky.app',
+  canMerge: boolean = false
 ): string {
   const rkey = post.uri.split('/').pop() || ''
   const date = formatDate(post.value.publishedAt)
@@ -61,29 +73,32 @@ export function renderPostDetail(
   // Build post URL for discussion search
   const postUrl = siteUrl ? `${siteUrl}/@${handle}/${rkey}` : `${window.location.origin}/@${handle}/${rkey}`
 
+  const rawContent = getContentText(post.value.content)
+
   const editBtn = isOwner ? `<button type="button" class="post-edit-btn" id="post-edit-btn">Edit</button>` : ''
+  const mergeBtn = canMerge ? `<button type="button" class="post-merge-btn" id="post-merge-btn" data-collection="${collection}" data-rkey="${rkey}" data-handle="${escapeHtml(handle)}" data-title="${escapeHtml(post.value.title || '')}" data-content="${escapeHtml(rawContent)}">Merge</button>` : ''
 
   // Get current language and show appropriate content
   const currentLang = getCurrentLang()
   const translations = post.value.translations
   const originalLang = post.value.langs?.[0] || 'ja'
 
-  let displayTitle = post.value.title
-  let displayContent = post.value.content.text
+  let displayTitle = post.value.title || ''
+  let displayContent = rawContent
 
   // Use translation if available and not original language
   if (translations && currentLang !== originalLang && translations[currentLang]) {
     const trans = translations[currentLang]
-    displayTitle = trans.title || post.value.title
-    displayContent = trans.content
+    displayTitle = trans.title || post.value.title || ''
+    displayContent = trans.content || rawContent
   }
 
-  const content = renderMarkdown(displayContent)
+  const content = displayContent ? renderMarkdown(displayContent) : ''
 
   const editForm = isOwner ? `
     <div class="post-edit-form" id="post-edit-form" style="display: none;">
-      <input type="text" class="post-edit-title" id="post-edit-title" value="${escapeHtml(post.value.title)}" placeholder="Title">
-      <textarea class="post-edit-content" id="post-edit-content" rows="15">${escapeHtml(post.value.content.text)}</textarea>
+      <input type="text" class="post-edit-title" id="post-edit-title" value="${escapeHtml(post.value.title || '')}" placeholder="Title">
+      <textarea class="post-edit-content" id="post-edit-content" rows="15">${escapeHtml(rawContent)}</textarea>
       <div class="post-edit-actions">
         <button type="button" class="post-edit-cancel" id="post-edit-cancel">Cancel</button>
         <button type="button" class="post-edit-save" id="post-edit-save" data-collection="${collection}" data-rkey="${rkey}">Save</button>
@@ -98,6 +113,7 @@ export function renderPostDetail(
           <time class="post-date">${date}</time>
           <a href="${jsonUrl}" class="json-btn">json</a>
           ${editBtn}
+          ${mergeBtn}
         </div>
       </header>
       ${editForm}
diff --git a/src/web/main.ts b/src/web/main.ts
index af17184..eaeae14 100644
--- a/src/web/main.ts
+++ b/src/web/main.ts
@@ -3,7 +3,7 @@ import './styles/card.css'
 import './styles/card-migrate.css'
 import { getConfig, resolveHandle, getProfile, getPosts, getPost, describeRepo, listRecords, getRecord, getPds, getNetworks, getChatMessages, getCards, getCardAdmin, getRse, getRseAdmin, getLinks } from './lib/api'
 import { parseRoute, onRouteChange, navigate, type Route } from './lib/router'
-import { login, logout, handleCallback, restoreSession, isLoggedIn, getLoggedInHandle, getLoggedInDid, deleteRecord, updatePost, updateChat, updateLinks } from './lib/auth'
+import { login, logout, handleCallback, restoreSession, isLoggedIn, getLoggedInHandle, getLoggedInDid, deleteRecord, updatePost, updateChat, updateLinks, createPost } from './lib/auth'
 import { validateRecord } from './lib/lexicon'
 import { renderHeader } from './components/header'
 import { renderProfile } from './components/profile'
@@ -238,7 +238,8 @@ async function render(route: Route): Promise<void> {
       const post = await getPost(did, config.collection, route.rkey, localOnly)
       html += renderLangSelector(langList)
       if (post) {
-        html += `<div id="content">${renderPostDetail(post, handle, config.collection, isOwner, config.siteUrl, webUrl)}</div>`
+        const canMerge = isLoggedIn() && !isOwner
+        html += `<div id="content">${renderPostDetail(post, handle, config.collection, isOwner, config.siteUrl, webUrl, canMerge)}</div>`
       } else {
         html += `<div id="content" class="error">Post not found</div>`
       }
@@ -438,12 +439,13 @@ async function render(route: Route): Promise<void> {
       setupValidateButton(currentRecord)
     }
 
-    // Setup post detail (translation toggle, discussion)
+    // Setup post detail (translation toggle, discussion, merge)
     if (route.type === 'post') {
       const contentEl = document.getElementById('content')
       if (contentEl) {
         setupPostDetail(contentEl)
       }
+      setupPostMerge(config.collection, handle)
     }
 
     // Setup card migration button
@@ -629,6 +631,46 @@ function setupPostEdit(collection: string): void {
   })
 }
 
+// Setup merge button for post detail
+function setupPostMerge(collection: string, _sourceHandle: string): void {
+  const mergeBtn = document.getElementById('post-merge-btn')
+  if (!mergeBtn) return
+
+  mergeBtn.addEventListener('click', async () => {
+    if (!confirm('Merge this post to your collection?')) return
+
+    const title = mergeBtn.getAttribute('data-title') || ''
+    const rawContent = mergeBtn.getAttribute('data-content') || ''
+
+    if (!rawContent) {
+      alert('No content to merge')
+      return
+    }
+
+    try {
+      mergeBtn.textContent = 'Merging...'
+      ;(mergeBtn as HTMLButtonElement).disabled = true
+
+      await createPost(collection, title, rawContent)
+
+      mergeBtn.textContent = 'Merged!'
+
+      // Navigate to logged-in user's page
+      const loggedInHandle = getLoggedInHandle()
+      if (loggedInHandle) {
+        setTimeout(() => {
+          navigate({ type: 'user', handle: loggedInHandle })
+        }, 1000)
+      }
+    } catch (err) {
+      console.error('Merge failed:', err)
+      alert('Merge failed: ' + err)
+      mergeBtn.textContent = 'Merge'
+      ;(mergeBtn as HTMLButtonElement).disabled = false
+    }
+  })
+}
+
 // Setup chat edit form
 function setupChatEdit(collection: string, handle: string): void {
   const form = document.getElementById('chat-edit-form') as HTMLFormElement
diff --git a/src/web/styles/main.css b/src/web/styles/main.css
index 723de43..789abe6 100644
--- a/src/web/styles/main.css
+++ b/src/web/styles/main.css
@@ -684,6 +684,30 @@ body {
   opacity: 0.85;
 }
 
+.post-merge-btn {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  padding: 4px 10px;
+  margin-left: 8px;
+  background: #666;
+  color: #fff;
+  border: none;
+  border-radius: 4px;
+  font-size: 12px;
+  cursor: pointer;
+  transition: opacity 0.2s;
+}
+
+.post-merge-btn:hover {
+  opacity: 0.85;
+}
+
+.post-merge-btn:disabled {
+  opacity: 0.5;
+  cursor: not-allowed;
+}
+
 /* Post Edit Form */
 .post-edit-form {
   margin-top: 16px;