diff --git a/channel/web/chat.html b/channel/web/chat.html
index b7a92492..964c95be 100644
--- a/channel/web/chat.html
+++ b/channel/web/chat.html
@@ -1100,7 +1100,7 @@
 
     <!-- Knowledge Action Dialog -->
     <div id="knowledge-dialog-overlay" class="fixed inset-0 bg-black/50 z-[200] hidden flex items-center justify-center">
-        <div id="knowledge-dialog-card" class="bg-white dark:bg-[#1A1A1A] rounded-2xl border border-slate-200 dark:border-white/10 shadow-xl w-full max-w-md mx-4 overflow-hidden">
+        <div id="knowledge-dialog-card" class="bg-white dark:bg-[#1A1A1A] rounded-2xl border border-slate-200 dark:border-white/10 shadow-xl w-full max-w-md mx-4">
             <div class="p-6">
                 <div class="flex items-center gap-3 mb-5">
                     <div class="w-10 h-10 rounded-xl bg-emerald-50 dark:bg-emerald-900/20 flex items-center justify-center">
@@ -1114,8 +1114,13 @@
                 <label id="knowledge-dialog-label" class="block text-sm font-medium text-slate-600 dark:text-slate-300 mb-1.5"></label>
                 <input id="knowledge-dialog-input" type="text"
                        class="w-full px-3 py-2 rounded-lg border border-slate-200 dark:border-slate-600 bg-slate-50 dark:bg-white/5 text-sm text-slate-800 dark:text-slate-100 focus:outline-none focus:border-primary-500">
-                <select id="knowledge-dialog-select"
-                        class="hidden w-full pl-3 pr-8 py-2 rounded-lg border border-slate-200 dark:border-slate-600 bg-slate-50 dark:bg-[#222] text-sm text-slate-800 dark:text-slate-100 focus:outline-none focus:border-primary-500"></select>
+                <div id="knowledge-dialog-select" class="cfg-dropdown hidden w-full" tabindex="0">
+                    <div class="cfg-dropdown-selected">
+                        <span class="cfg-dropdown-text">--</span>
+                        <i class="fas fa-chevron-down cfg-dropdown-arrow"></i>
+                    </div>
+                    <div class="cfg-dropdown-menu"></div>
+                </div>
                 <textarea id="knowledge-dialog-textarea" rows="8"
                           class="hidden w-full px-3 py-2 rounded-lg border border-slate-200 dark:border-slate-600 bg-slate-50 dark:bg-white/5 text-sm text-slate-800 dark:text-slate-100 focus:outline-none focus:border-primary-500 font-mono resize-y"></textarea>
                 <div id="knowledge-document-form" class="hidden space-y-3">
diff --git a/channel/web/static/js/console.js b/channel/web/static/js/console.js
index ff0648f3..b64a76ca 100644
--- a/channel/web/static/js/console.js
+++ b/channel/web/static/js/console.js
@@ -8054,7 +8054,10 @@ function openKnowledgeDialog(options) {
         documentContent.focus();
     };
     if (options.type === 'select') {
-        select.innerHTML = (options.choices || []).map(value => `<option value="${escapeHtml(value)}">${escapeHtml(value)}</option>`).join('');
+        // Use the shared custom dropdown component instead of a native
+        // <select> so the arrow / menu match the rest of the console.
+        const ddOptions = (options.choices || []).map(value => ({ value, label: value }));
+        initDropdown(select, ddOptions, (options.choices || [])[0] || '', null);
     }
     submit.textContent = currentLang === 'zh' ? '确定' : 'Confirm';
     cancel.textContent = currentLang === 'zh' ? '取消' : 'Cancel';
@@ -8062,7 +8065,7 @@ function openKnowledgeDialog(options) {
 
     const close = () => overlay.classList.add('hidden');
     const submitAction = async () => {
-        const rawValue = options.type === 'select' ? select.value :
+        const rawValue = options.type === 'select' ? getDropdownValue(select) :
             (options.type === 'textarea' ? textarea.value :
             (options.type === 'document' ? {
                 filename: documentFilename.value.trim(),
diff --git a/desktop/src/renderer/src/api/client.ts b/desktop/src/renderer/src/api/client.ts
index eb47db61..05feeee4 100644
--- a/desktop/src/renderer/src/api/client.ts
+++ b/desktop/src/renderer/src/api/client.ts
@@ -16,6 +16,7 @@ import type {
   KnowledgeList,
   KnowledgeGraph,
   KnowledgeAction,
+  KnowledgeImportPayload,
 } from '../types'
 
 interface ApiResult {
@@ -315,6 +316,23 @@ class ApiClient {
     })
   }
 
+  // Bulk import: upload .md/.txt files into a target category (multipart).
+  async importKnowledge(
+    files: File[],
+    targetCategory: string
+  ): Promise<{ status: string; message?: string; payload?: KnowledgeImportPayload }> {
+    const formData = new FormData()
+    formData.append('target_category', targetCategory)
+    formData.append('conflict_strategy', 'rename')
+    files.forEach((file) => formData.append('files', file, file.name))
+    const res = await fetch(`${this.baseUrl}/api/knowledge/import`, {
+      method: 'POST',
+      body: formData,
+      credentials: 'include',
+    })
+    return res.json()
+  }
+
   // ---------------------------------------------------------
   // Scheduler
   // ---------------------------------------------------------
diff --git a/desktop/src/renderer/src/i18n.ts b/desktop/src/renderer/src/i18n.ts
index 3beb4ba3..3ba01042 100644
--- a/desktop/src/renderer/src/i18n.ts
+++ b/desktop/src/renderer/src/i18n.ts
@@ -29,6 +29,43 @@ const translations: Record<string, Record<string, string>> = {
     knowledge_graph_empty: '暂无关联图谱',
     knowledge_disabled: '知识库未启用',
     knowledge_doc_load_error: '文档加载失败',
+    // knowledge management
+    knowledge_new: '新建',
+    knowledge_new_category: '新建分类',
+    knowledge_new_document: '新建文档',
+    knowledge_import_documents: '导入文档',
+    knowledge_working: '处理中...',
+    knowledge_importing: '正在导入...',
+    knowledge_request_failed: '请求失败，请稍后重试',
+    knowledge_import_failed: '导入失败',
+    knowledge_category_created: '分类已创建',
+    knowledge_document_created: '文档已创建',
+    knowledge_dialog_confirm: '确定',
+    knowledge_dialog_cancel: '取消',
+    knowledge_field_required: '此项不能为空',
+    knowledge_category_label: '分类路径',
+    knowledge_category_hint: '支持嵌套路径，例如 research/ai',
+    knowledge_category_subtitle: '分类会创建为 knowledge/ 下的目录',
+    knowledge_need_category: '请先创建分类',
+    knowledge_destination: '目标分类',
+    knowledge_doc_choose_category: '先选择分类，然后输入文件名',
+    knowledge_doc_save_to: '保存到 {category}',
+    knowledge_doc_filename: '文件名',
+    knowledge_doc_filename_required: '文件名不能为空',
+    knowledge_doc_must_md: '新建文档仅支持 .md 文件名',
+    knowledge_doc_content: 'Markdown 内容',
+    knowledge_doc_content_required: '内容不能为空',
+    knowledge_doc_content_too_large: '内容不能超过 10MB',
+    knowledge_doc_insert_template: '插入模板',
+    knowledge_import_selected: '已选择 {count} 个文件',
+    knowledge_import_hint: '支持 Markdown 和 TXT，TXT 会转成 Markdown 文档',
+    knowledge_import_need_category: '请先创建一个分类',
+    knowledge_import_choose_files: '请选择 .md 或 .txt 文件',
+    knowledge_import_too_many: '一次最多导入 {max} 个文件',
+    knowledge_import_file_too_large: '{name} 超过 10MB',
+    knowledge_import_total_too_large: '单次导入总大小不能超过 200MB',
+    knowledge_import_result: '导入 {imported} 个，跳过 {skipped} 个，失败 {failed} 个',
+    knowledge_drop_hint: '拖放 .md / .txt 文件到此导入',
     nav_expand: '展开侧栏',
     nav_collapse: '收起侧栏',
     update_available: '发现新版本',
@@ -324,6 +361,43 @@ const translations: Record<string, Record<string, string>> = {
     knowledge_graph_empty: 'No graph available',
     knowledge_disabled: 'Knowledge base is disabled',
     knowledge_doc_load_error: 'Failed to load document',
+    // knowledge management
+    knowledge_new: 'New',
+    knowledge_new_category: 'New category',
+    knowledge_new_document: 'New document',
+    knowledge_import_documents: 'Import documents',
+    knowledge_working: 'Working...',
+    knowledge_importing: 'Importing...',
+    knowledge_request_failed: 'Request failed, please try again',
+    knowledge_import_failed: 'Import failed',
+    knowledge_category_created: 'Category created',
+    knowledge_document_created: 'Document created',
+    knowledge_dialog_confirm: 'Confirm',
+    knowledge_dialog_cancel: 'Cancel',
+    knowledge_field_required: 'This field is required',
+    knowledge_category_label: 'Category path',
+    knowledge_category_hint: 'Nested paths are supported, e.g. research/ai',
+    knowledge_category_subtitle: 'Creates a directory under knowledge/',
+    knowledge_need_category: 'Create a category first',
+    knowledge_destination: 'Destination category',
+    knowledge_doc_choose_category: 'Choose a category, then enter a filename',
+    knowledge_doc_save_to: 'Save to {category}',
+    knowledge_doc_filename: 'Filename',
+    knowledge_doc_filename_required: 'Filename is required',
+    knowledge_doc_must_md: 'New documents must be .md files',
+    knowledge_doc_content: 'Markdown content',
+    knowledge_doc_content_required: 'Content is required',
+    knowledge_doc_content_too_large: 'Content cannot exceed 10MB',
+    knowledge_doc_insert_template: 'Insert template',
+    knowledge_import_selected: '{count} file(s) selected',
+    knowledge_import_hint: 'Markdown and TXT are supported. TXT is converted to Markdown.',
+    knowledge_import_need_category: 'Create a category first',
+    knowledge_import_choose_files: 'Choose .md or .txt files',
+    knowledge_import_too_many: 'Import at most {max} files at a time',
+    knowledge_import_file_too_large: '{name} exceeds 10MB',
+    knowledge_import_total_too_large: 'Total import size cannot exceed 200MB',
+    knowledge_import_result: '{imported} imported · {skipped} skipped · {failed} failed',
+    knowledge_drop_hint: 'Drop .md / .txt files here to import',
     menu_settings: 'Settings',
     nav_expand: 'Expand sidebar',
     nav_collapse: 'Collapse sidebar',
diff --git a/desktop/src/renderer/src/pages/KnowledgePage.tsx b/desktop/src/renderer/src/pages/KnowledgePage.tsx
index 7c91c0eb..9b873024 100644
--- a/desktop/src/renderer/src/pages/KnowledgePage.tsx
+++ b/desktop/src/renderer/src/pages/KnowledgePage.tsx
@@ -1,4 +1,4 @@
-import React, { useCallback, useEffect, useMemo, useState } from 'react'
+import React, { useCallback, useEffect, useMemo, useRef, useState } from 'react'
 import {
   Loader2,
   Search,
@@ -8,12 +8,21 @@ import {
   MessageSquarePlus,
   Network,
   Files,
+  Plus,
+  FolderPlus,
+  FilePlus2,
+  Upload,
 } from 'lucide-react'
 import type { LucideIcon } from 'lucide-react'
 import { useNavigate } from 'react-router-dom'
-import { t } from '../i18n'
+import { t, getLang } from '../i18n'
 import apiClient from '../api/client'
-import type { KnowledgeDir, KnowledgeFile, KnowledgeList, KnowledgeGraph as KnowledgeGraphData } from '../types'
+import type {
+  KnowledgeDir,
+  KnowledgeFile,
+  KnowledgeList,
+  KnowledgeGraph as KnowledgeGraphData,
+} from '../types'
 import Markdown from '../components/Markdown'
 import KnowledgeGraph from '../components/KnowledgeGraph'
 
@@ -23,12 +32,58 @@ interface KnowledgePageProps {
 
 type Tab = 'docs' | 'graph'
 
+const KNOWLEDGE_IMPORT_MAX_FILES = 100
+const KNOWLEDGE_IMPORT_MAX_FILE_SIZE = 10 * 1024 * 1024
+const KNOWLEDGE_IMPORT_MAX_TOTAL_SIZE = 200 * 1024 * 1024
+
+// t() with simple {placeholder} interpolation.
+const tf = (key: string, vars: Record<string, string | number>): string => {
+  let out = t(key)
+  for (const [k, v] of Object.entries(vars)) out = out.replace(`{${k}}`, String(v))
+  return out
+}
+
 const formatSize = (bytes: number): string => {
   if (bytes < 1024) return bytes + ' B'
   if (bytes < 1024 * 1024) return (bytes / 1024).toFixed(1) + ' KB'
   return (bytes / (1024 * 1024)).toFixed(1) + ' MB'
 }
 
+// Flatten the tree into category paths (for destination selectors).
+function categoryPaths(dirs: KnowledgeDir[], parent = ''): string[] {
+  const paths: string[] = []
+  for (const dir of dirs || []) {
+    const path = parent ? `${parent}/${dir.dir}` : dir.dir
+    paths.push(path, ...categoryPaths(dir.children || [], path))
+  }
+  return paths
+}
+
+// Validate a batch of files chosen for import. Returns an error message or ''.
+function validateImportFiles(files: File[]): string {
+  if (!files.length) return t('knowledge_import_choose_files')
+  if (files.length > KNOWLEDGE_IMPORT_MAX_FILES) {
+    return tf('knowledge_import_too_many', { max: KNOWLEDGE_IMPORT_MAX_FILES })
+  }
+  let total = 0
+  for (const file of files) {
+    total += file.size || 0
+    if ((file.size || 0) > KNOWLEDGE_IMPORT_MAX_FILE_SIZE) {
+      return tf('knowledge_import_file_too_large', { name: file.name })
+    }
+  }
+  if (total > KNOWLEDGE_IMPORT_MAX_TOTAL_SIZE) return t('knowledge_import_total_too_large')
+  return ''
+}
+
+// ---- Dialog model ----------------------------------------------------------
+
+interface DialogState {
+  kind: 'category' | 'doc-pick-category' | 'document' | 'import'
+  category?: string
+  files?: File[]
+}
+
 // Find the first document (root files first, then a DFS over the tree).
 function firstFile(list: KnowledgeList): { path: string; title: string } | null {
   const root = list.root_files?.[0]
@@ -50,6 +105,30 @@ function firstFile(list: KnowledgeList): { path: string; title: string } | null
   return null
 }
 
+// Resolve a document's display title from its path, falling back to the stem.
+function findTitle(list: KnowledgeList, path: string): string {
+  const fallback = path.split('/').pop()?.replace(/\.md$/i, '') || path
+  for (const f of list.root_files || []) {
+    if (f.name === path) return f.title || fallback
+  }
+  const walk = (dir: KnowledgeDir, prefix: string): string | null => {
+    const dirPath = prefix ? `${prefix}/${dir.dir}` : dir.dir
+    for (const f of dir.files) {
+      if (`${dirPath}/${f.name}` === path) return f.title || fallback
+    }
+    for (const c of dir.children) {
+      const hit = walk(c, dirPath)
+      if (hit) return hit
+    }
+    return null
+  }
+  for (const d of list.tree || []) {
+    const hit = walk(d, '')
+    if (hit) return hit
+  }
+  return fallback
+}
+
 const KnowledgePage: React.FC<KnowledgePageProps> = ({ baseUrl }) => {
   const navigate = useNavigate()
   const [tab, setTab] = useState<Tab>('docs')
@@ -65,6 +144,22 @@ const KnowledgePage: React.FC<KnowledgePageProps> = ({ baseUrl }) => {
   const [graph, setGraph] = useState<KnowledgeGraphData | null>(null)
   const [graphLoading, setGraphLoading] = useState(false)
 
+  // Management UI state.
+  const [menuOpen, setMenuOpen] = useState(false)
+  const [dialog, setDialog] = useState<DialogState | null>(null)
+  const [status, setStatus] = useState<{ text: string; error: boolean } | null>(null)
+  const [dragOver, setDragOver] = useState(false)
+  const fileInputRef = useRef<HTMLInputElement>(null)
+  const statusTimer = useRef<ReturnType<typeof setTimeout> | null>(null)
+
+  const showStatus = useCallback((text: string, error = false, sticky = false) => {
+    if (statusTimer.current) clearTimeout(statusTimer.current)
+    setStatus({ text, error })
+    if (!sticky) {
+      statusTimer.current = setTimeout(() => setStatus(null), 4000)
+    }
+  }, [])
+
   const openDoc = useCallback(async (path: string, title: string) => {
     setActivePath(path)
     setDocTitle(title)
@@ -80,16 +175,37 @@ const KnowledgePage: React.FC<KnowledgePageProps> = ({ baseUrl }) => {
     }
   }, [])
 
+  // Reload the tree. When targetPath is given, open it; otherwise keep the
+  // currently open doc (or open the first one on the initial load).
+  const refresh = useCallback(
+    async (targetPath?: string) => {
+      try {
+        const fresh = await apiClient.getKnowledgeList()
+        setData(fresh)
+        if (targetPath) {
+          void openDoc(targetPath, findTitle(fresh, targetPath))
+        } else if (!activePath) {
+          const first = firstFile(fresh)
+          if (first) void openDoc(first.path, first.title)
+        }
+        return fresh
+      } catch (e) {
+        console.error('Failed to load knowledge:', e)
+        return null
+      }
+    },
+    [openDoc, activePath]
+  )
+
   useEffect(() => {
     apiClient.setBaseUrl(baseUrl)
     let cancelled = false
     ;(async () => {
+      setLoading(true)
       try {
-        setLoading(true)
         const fresh = await apiClient.getKnowledgeList()
         if (cancelled) return
         setData(fresh)
-        // Auto-open the first document so the viewer isn't empty on entry.
         const first = firstFile(fresh)
         if (first) void openDoc(first.path, first.title)
       } catch (e) {
@@ -101,7 +217,9 @@ const KnowledgePage: React.FC<KnowledgePageProps> = ({ baseUrl }) => {
     return () => {
       cancelled = true
     }
-  }, [baseUrl, openDoc])
+    // Only run on baseUrl change (initial mount). refresh() handles later reloads.
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [baseUrl])
 
   const loadGraph = useCallback(async () => {
     if (graph) return
@@ -130,6 +248,115 @@ const KnowledgePage: React.FC<KnowledgePageProps> = ({ baseUrl }) => {
     [openDoc]
   )
 
+  // ---- Management actions --------------------------------------------------
+
+  const categories = useMemo(() => categoryPaths(data?.tree || []), [data])
+
+  const createCategory = useCallback(
+    async (path: string): Promise<string | null> => {
+      showStatus(t('knowledge_working'), false, true)
+      try {
+        const res = await apiClient.knowledgeAction({ action: 'create_category', payload: { path } })
+        if (res.status !== 'success') {
+          showStatus((res.message as string) || t('knowledge_request_failed'), true)
+          return null
+        }
+        showStatus(t('knowledge_category_created'))
+        await refresh()
+        return path
+      } catch {
+        showStatus(t('knowledge_request_failed'), true)
+        return null
+      }
+    },
+    [refresh, showStatus]
+  )
+
+  const createDocument = useCallback(
+    async (path: string, content: string): Promise<string | null> => {
+      showStatus(t('knowledge_working'), false, true)
+      try {
+        const res = await apiClient.knowledgeAction({
+          action: 'create_document',
+          payload: { path, content, overwrite: false },
+        })
+        if (res.status !== 'success') {
+          showStatus((res.message as string) || t('knowledge_request_failed'), true)
+          return null
+        }
+        const created = ((res.payload as { path?: string })?.path) || path
+        showStatus(t('knowledge_document_created'))
+        await refresh(created)
+        return created
+      } catch {
+        showStatus(t('knowledge_request_failed'), true)
+        return null
+      }
+    },
+    [refresh, showStatus]
+  )
+
+  const importDocuments = useCallback(
+    async (files: File[], targetCategory: string): Promise<boolean> => {
+      const err = validateImportFiles(files)
+      if (err) {
+        showStatus(err, true)
+        return false
+      }
+      const supported = files.filter((f) => /\.(md|txt)$/i.test(f.name || ''))
+      if (!supported.length) {
+        showStatus(t('knowledge_import_choose_files'), true)
+        return false
+      }
+      showStatus(t('knowledge_importing'), false, true)
+      try {
+        const res = await apiClient.importKnowledge(supported, targetCategory)
+        if (res.status !== 'success') {
+          showStatus(res.message || t('knowledge_import_failed'), true)
+          await refresh()
+          return false
+        }
+        const p = res.payload
+        showStatus(
+          tf('knowledge_import_result', {
+            imported: p?.imported ?? 0,
+            skipped: p?.skipped ?? 0,
+            failed: p?.failed ?? 0,
+          })
+        )
+        const first = (p?.results || []).find((r) => r.status === 'imported')
+        await refresh(first?.path)
+        return true
+      } catch {
+        showStatus(t('knowledge_import_failed'), true)
+        return false
+      }
+    },
+    [refresh, showStatus]
+  )
+
+  // Open the import dialog after validating the chosen files.
+  const startImport = useCallback(
+    (files: File[]) => {
+      const err = validateImportFiles(files)
+      if (err) {
+        showStatus(err, true)
+        return
+      }
+      setDialog({ kind: 'import', files })
+    },
+    [showStatus]
+  )
+
+  const onFilesPicked = useCallback(
+    (e: React.ChangeEvent<HTMLInputElement>) => {
+      const files = Array.from(e.target.files || [])
+      e.target.value = ''
+      if (files.length) startImport(files)
+    },
+    [startImport]
+  )
+
   const totalPages = data?.stats?.pages ?? 0
   const statsLabel = useMemo(() => {
     if (!data) return ''
@@ -178,19 +405,81 @@ const KnowledgePage: React.FC<KnowledgePageProps> = ({ baseUrl }) => {
           <h2 className="text-xl font-bold text-content">{t('knowledge_title')}</h2>
           <p className="text-xs text-content-tertiary mt-1">{statsLabel}</p>
         </div>
-        <div className="flex items-center gap-1 bg-inset rounded-btn p-0.5">
-          <TabBtn icon={Files} label={t('knowledge_tab_docs')} active={tab === 'docs'} onClick={() => switchTab('docs')} />
-          <TabBtn
-            icon={Network}
-            label={t('knowledge_tab_graph')}
-            active={tab === 'graph'}
-            onClick={() => switchTab('graph')}
+        <div className="flex items-center gap-2">
+          {status && (
+            <span
+              className={`text-xs max-w-[260px] truncate ${
+                status.error ? 'text-danger' : 'text-content-tertiary'
+              }`}
+              title={status.text}
+            >
+              {status.text}
+            </span>
+          )}
+          <div className="flex items-center gap-1 bg-inset rounded-btn p-0.5">
+            <TabBtn icon={Files} label={t('knowledge_tab_docs')} active={tab === 'docs'} onClick={() => switchTab('docs')} />
+            <TabBtn
+              icon={Network}
+              label={t('knowledge_tab_graph')}
+              active={tab === 'graph'}
+              onClick={() => switchTab('graph')}
+            />
+          </div>
+          <NewMenu
+            open={menuOpen}
+            setOpen={setMenuOpen}
+            onCreateCategory={() => setDialog({ kind: 'category' })}
+            onCreateDocument={() => {
+              if (!categories.length) {
+                showStatus(t('knowledge_need_category'), true)
+                return
+              }
+              setDialog({ kind: 'doc-pick-category' })
+            }}
+            onImport={() => fileInputRef.current?.click()}
           />
         </div>
+        <input
+          ref={fileInputRef}
+          type="file"
+          multiple
+          accept=".md,.txt,text/markdown,text/plain"
+          className="hidden"
+          onChange={onFilesPicked}
+        />
       </div>
 
       {tab === 'docs' ? (
-        <div className="flex-1 flex min-h-0 border-t border-default">
+        <div
+          className="flex-1 flex min-h-0 border-t border-default relative"
+          onDragEnter={(e) => {
+            if (e.dataTransfer?.types?.includes('Files')) {
+              e.preventDefault()
+              setDragOver(true)
+            }
+          }}
+          onDragOver={(e) => {
+            if (e.dataTransfer?.types?.includes('Files')) e.preventDefault()
+          }}
+          onDragLeave={(e) => {
+            // Only clear when leaving the panel, not its children.
+            if (e.currentTarget === e.target) setDragOver(false)
+          }}
+          onDrop={(e) => {
+            e.preventDefault()
+            setDragOver(false)
+            const files = Array.from(e.dataTransfer?.files || [])
+            if (files.length) startImport(files)
+          }}
+        >
+          {dragOver && (
+            <div className="absolute inset-0 z-30 flex items-center justify-center bg-accent-soft/80 border-2 border-dashed border-accent rounded-lg m-2 pointer-events-none">
+              <div className="flex flex-col items-center gap-2 text-accent">
+                <Upload size={28} />
+                <p className="text-sm font-medium">{t('knowledge_drop_hint')}</p>
+              </div>
+            </div>
+          )}
           {/* Tree sidebar */}
           <div className="w-72 flex-shrink-0 flex flex-col border-r border-default min-h-0">
             <div className="p-3 flex-shrink-0">
@@ -251,6 +540,313 @@ const KnowledgePage: React.FC<KnowledgePageProps> = ({ baseUrl }) => {
           )}
         </div>
       )}
+
+      {dialog && (
+        <KnowledgeDialog
+          state={dialog}
+          categories={categories}
+          onClose={() => setDialog(null)}
+          onCreateCategory={createCategory}
+          onPickDocCategory={(category) => setDialog({ kind: 'document', category })}
+          onCreateDocument={createDocument}
+          onImport={importDocuments}
+        />
+      )}
+    </div>
+  )
+}
+
+// ---- New menu --------------------------------------------------------------
+
+const NewMenu: React.FC<{
+  open: boolean
+  setOpen: (v: boolean) => void
+  onCreateCategory: () => void
+  onCreateDocument: () => void
+  onImport: () => void
+}> = ({ open, setOpen, onCreateCategory, onCreateDocument, onImport }) => {
+  const ref = useRef<HTMLDivElement>(null)
+  useEffect(() => {
+    if (!open) return
+    const onClickOutside = (e: MouseEvent) => {
+      if (ref.current && !ref.current.contains(e.target as Node)) setOpen(false)
+    }
+    document.addEventListener('mousedown', onClickOutside)
+    return () => document.removeEventListener('mousedown', onClickOutside)
+  }, [open, setOpen])
+
+  const pick = (fn: () => void) => {
+    setOpen(false)
+    fn()
+  }
+
+  return (
+    <div ref={ref} className="relative">
+      <button
+        onClick={() => setOpen(!open)}
+        className="inline-flex items-center gap-1.5 px-3 py-1.5 rounded-btn bg-accent text-accent-contrast hover:bg-accent-hover text-sm font-medium cursor-pointer transition-colors"
+      >
+        <Plus size={14} />
+        {t('knowledge_new')}
+        <ChevronDown size={12} className="opacity-80" />
+      </button>
+      {open && (
+        <div className="absolute right-0 mt-1.5 w-44 z-50 bg-surface border border-default rounded-lg shadow-lg py-1">
+          <MenuItem icon={FolderPlus} label={t('knowledge_new_category')} onClick={() => pick(onCreateCategory)} />
+          <MenuItem icon={FilePlus2} label={t('knowledge_new_document')} onClick={() => pick(onCreateDocument)} />
+          <MenuItem icon={Upload} label={t('knowledge_import_documents')} onClick={() => pick(onImport)} />
+        </div>
+      )}
+    </div>
+  )
+}
+
+const MenuItem: React.FC<{ icon: LucideIcon; label: string; onClick: () => void }> = ({
+  icon: Icon,
+  label,
+  onClick,
+}) => (
+  <button
+    onClick={onClick}
+    className="w-full flex items-center gap-2.5 px-3 py-2 text-sm text-content-secondary hover:bg-surface-2 cursor-pointer transition-colors text-left"
+  >
+    <Icon size={14} className="opacity-70 flex-shrink-0" />
+    {label}
+  </button>
+)
+
+// ---- Dialog ----------------------------------------------------------------
+
+function templateFor(filename: string): string {
+  const title = (filename || 'untitled').replace(/\.md$/i, '')
+  return getLang() === 'zh'
+    ? `# ${title}\n\n## 摘要\n\n\n## 关键点\n\n- \n\n## 参考\n\n`
+    : `# ${title}\n\n## Summary\n\n\n## Key points\n\n- \n\n## References\n\n`
+}
+
+const KnowledgeDialog: React.FC<{
+  state: DialogState
+  categories: string[]
+  onClose: () => void
+  onCreateCategory: (path: string) => Promise<string | null>
+  onPickDocCategory: (category: string) => void
+  onCreateDocument: (path: string, content: string) => Promise<string | null>
+  onImport: (files: File[], target: string) => Promise<boolean>
+}> = ({ state, categories, onClose, onCreateCategory, onPickDocCategory, onCreateDocument, onImport }) => {
+  const [categoryInput, setCategoryInput] = useState('')
+  const [selected, setSelected] = useState(categories[0] || '')
+  const [filename, setFilename] = useState('')
+  const [contentInput, setContentInput] = useState('')
+  const [error, setError] = useState('')
+  const [busy, setBusy] = useState(false)
+
+  const submit = async () => {
+    setError('')
+    if (state.kind === 'category') {
+      const path = categoryInput.trim()
+      if (!path) return setError(t('knowledge_field_required'))
+      setBusy(true)
+      const ok = await onCreateCategory(path)
+      setBusy(false)
+      if (ok !== null) onClose()
+      return
+    }
+    if (state.kind === 'doc-pick-category') {
+      if (!selected) return setError(t('knowledge_field_required'))
+      onPickDocCategory(selected)
+      return
+    }
+    if (state.kind === 'document') {
+      const name = filename.trim()
+      if (!name) return setError(t('knowledge_doc_filename_required'))
+      if (/\.[^.]+$/i.test(name) && !/\.md$/i.test(name)) return setError(t('knowledge_doc_must_md'))
+      if (!contentInput.trim()) return setError(t('knowledge_doc_content_required'))
+      if (new Blob([contentInput]).size > KNOWLEDGE_IMPORT_MAX_FILE_SIZE) {
+        return setError(t('knowledge_doc_content_too_large'))
+      }
+      const safeName = name.endsWith('.md') ? name : `${name}.md`
+      setBusy(true)
+      const ok = await onCreateDocument(`${state.category}/${safeName}`, contentInput)
+      setBusy(false)
+      if (ok !== null) onClose()
+      return
+    }
+    if (state.kind === 'import') {
+      if (!selected) return setError(t('knowledge_field_required'))
+      setBusy(true)
+      const ok = await onImport(state.files || [], selected)
+      setBusy(false)
+      if (ok) onClose()
+      return
+    }
+  }
+
+  const titleMap: Record<DialogState['kind'], string> = {
+    category: t('knowledge_new_category'),
+    'doc-pick-category': t('knowledge_new_document'),
+    document: t('knowledge_new_document'),
+    import: t('knowledge_import_documents'),
+  }
+
+  const noCategory = (state.kind === 'doc-pick-category' || state.kind === 'import') && !categories.length
+
+  return (
+    <div className="fixed inset-0 z-[70] flex items-center justify-center bg-black/40 p-4" onMouseDown={onClose}>
+      <div
+        className="w-full max-w-lg bg-surface border border-default rounded-xl shadow-xl p-5"
+        onMouseDown={(e) => e.stopPropagation()}
+      >
+        <h3 className="text-base font-semibold text-content mb-1">{titleMap[state.kind]}</h3>
+
+        {state.kind === 'category' && (
+          <>
+            <p className="text-xs text-content-tertiary mb-4">{t('knowledge_category_subtitle')}</p>
+            <label className="block text-sm text-content-secondary mb-1.5">{t('knowledge_category_label')}</label>
+            <input
+              autoFocus
+              value={categoryInput}
+              onChange={(e) => setCategoryInput(e.target.value)}
+              onKeyDown={(e) => e.key === 'Enter' && submit()}
+              placeholder="research/ai"
+              className="w-full px-3 py-2 rounded-btn border border-strong bg-inset text-sm text-content placeholder:text-content-tertiary focus:outline-none focus:border-accent transition-colors"
+            />
+            <p className="text-xs text-content-tertiary mt-1.5">{t('knowledge_category_hint')}</p>
+          </>
+        )}
+
+        {state.kind === 'doc-pick-category' && (
+          <>
+            <p className="text-xs text-content-tertiary mb-4">{t('knowledge_doc_choose_category')}</p>
+            <label className="block text-sm text-content-secondary mb-1.5">{t('knowledge_destination')}</label>
+            <CategorySelect value={selected} options={categories} onChange={setSelected} />
+          </>
+        )}
+
+        {state.kind === 'document' && (
+          <>
+            <p className="text-xs text-content-tertiary mb-4">
+              {tf('knowledge_doc_save_to', { category: state.category || '' })}
+            </p>
+            <label className="block text-sm text-content-secondary mb-1.5">{t('knowledge_doc_filename')}</label>
+            <input
+              autoFocus
+              value={filename}
+              onChange={(e) => setFilename(e.target.value)}
+              placeholder="my-note.md"
+              className="w-full px-3 py-2 rounded-btn border border-strong bg-inset text-sm text-content placeholder:text-content-tertiary focus:outline-none focus:border-accent transition-colors mb-3"
+            />
+            <div className="flex items-center justify-between mb-1.5">
+              <label className="text-sm text-content-secondary">{t('knowledge_doc_content')}</label>
+              <button
+                onClick={() => {
+                  if (!contentInput.trim()) setContentInput(templateFor(filename))
+                }}
+                className="text-xs text-accent hover:underline cursor-pointer"
+              >
+                {t('knowledge_doc_insert_template')}
+              </button>
+            </div>
+            <textarea
+              value={contentInput}
+              onChange={(e) => setContentInput(e.target.value)}
+              rows={10}
+              className="w-full px-3 py-2 rounded-btn border border-strong bg-inset text-sm text-content placeholder:text-content-tertiary focus:outline-none focus:border-accent transition-colors font-mono resize-y"
+            />
+          </>
+        )}
+
+        {state.kind === 'import' && (
+          <>
+            <p className="text-xs text-content-tertiary mb-4">
+              {tf('knowledge_import_selected', { count: state.files?.length ?? 0 })}
+            </p>
+            <label className="block text-sm text-content-secondary mb-1.5">{t('knowledge_destination')}</label>
+            <CategorySelect value={selected} options={categories} onChange={setSelected} />
+            <p className="text-xs text-content-tertiary mt-1.5">
+              {categories.length ? t('knowledge_import_hint') : t('knowledge_import_need_category')}
+            </p>
+          </>
+        )}
+
+        {error && <p className="text-xs text-danger mt-3">{error}</p>}
+
+        <div className="flex justify-end gap-2 mt-5">
+          <button
+            onClick={onClose}
+            className="px-4 py-2 rounded-btn border border-strong text-content-secondary hover:bg-surface-2 text-sm font-medium cursor-pointer transition-colors"
+          >
+            {t('knowledge_dialog_cancel')}
+          </button>
+          <button
+            onClick={submit}
+            disabled={busy || noCategory}
+            className="px-4 py-2 rounded-btn bg-accent text-accent-contrast hover:bg-accent-hover text-sm font-medium cursor-pointer transition-colors disabled:opacity-50 disabled:cursor-not-allowed inline-flex items-center gap-1.5"
+          >
+            {busy && <Loader2 size={14} className="animate-spin" />}
+            {t('knowledge_dialog_confirm')}
+          </button>
+        </div>
+      </div>
+    </div>
+  )
+}
+
+// Custom dropdown: keeps the arrow / menu styling consistent with the rest of
+// the desktop UI (a native <select> renders an OS arrow we can't space out).
+const CategorySelect: React.FC<{ value: string; options: string[]; onChange: (v: string) => void }> = ({
+  value,
+  options,
+  onChange,
+}) => {
+  const [open, setOpen] = useState(false)
+  const ref = useRef<HTMLDivElement>(null)
+
+  useEffect(() => {
+    if (!open) return
+    const onClickOutside = (e: MouseEvent) => {
+      if (ref.current && !ref.current.contains(e.target as Node)) setOpen(false)
+    }
+    document.addEventListener('mousedown', onClickOutside)
+    return () => document.removeEventListener('mousedown', onClickOutside)
+  }, [open])
+
+  const disabled = !options.length
+
+  return (
+    <div ref={ref} className="relative">
+      <button
+        type="button"
+        disabled={disabled}
+        onClick={() => setOpen((v) => !v)}
+        className={`w-full flex items-center justify-between gap-2 px-3 py-2 rounded-btn border text-sm text-content transition-colors cursor-pointer ${
+          open ? 'border-accent' : 'border-strong'
+        } bg-inset hover:border-accent/70 disabled:opacity-50 disabled:cursor-not-allowed`}
+      >
+        <span className="truncate">{value || '--'}</span>
+        <ChevronDown
+          size={14}
+          className={`flex-shrink-0 text-content-tertiary transition-transform ${open ? 'rotate-180' : ''}`}
+        />
+      </button>
+      {open && (
+        <div className="absolute left-0 right-0 top-full mt-1 z-50 max-h-60 overflow-y-auto bg-surface border border-default rounded-lg shadow-lg p-1">
+          {options.map((opt) => (
+            <button
+              key={opt}
+              type="button"
+              onClick={() => {
+                onChange(opt)
+                setOpen(false)
+              }}
+              className={`w-full text-left px-2.5 py-1.5 rounded-md text-sm cursor-pointer transition-colors truncate ${
+                opt === value ? 'bg-accent-soft text-accent' : 'text-content-secondary hover:bg-surface-2'
+              }`}
+            >
+              {opt}
+            </button>
+          ))}
+        </div>
+      )}
     </div>
   )
 }
diff --git a/desktop/src/renderer/src/types.ts b/desktop/src/renderer/src/types.ts
index 50018b4e..337fed59 100644
--- a/desktop/src/renderer/src/types.ts
+++ b/desktop/src/renderer/src/types.ts
@@ -422,11 +422,27 @@ export interface KnowledgeGraph {
 
 export type KnowledgeAction =
   | { action: 'create_category'; payload: { path: string } }
+  | { action: 'create_document'; payload: { path: string; content: string; overwrite?: boolean } }
   | { action: 'rename_category'; payload: { path: string; new_path: string } }
   | { action: 'delete_category'; payload: { path: string; confirm?: boolean } }
   | { action: 'delete_documents'; payload: { paths: string[] } }
   | { action: 'move_documents'; payload: { paths: string[]; target_category: string } }
 
+// Result row from a bulk import (one per uploaded file).
+export interface KnowledgeImportResult {
+  status: 'imported' | 'skipped' | 'failed'
+  path?: string
+  name?: string
+  message?: string
+}
+
+export interface KnowledgeImportPayload {
+  imported: number
+  skipped: number
+  failed: number
+  results: KnowledgeImportResult[]
+}
+
 // ============================================================
 // Scheduler
 // ============================================================