diff --git a/lua/memos/api.lua b/lua/memos/api.lua
index b89ed1d..5697cf6 100644
--- a/lua/memos/api.lua
+++ b/lua/memos/api.lua
@@ -1,92 +1,137 @@
-local Job = require('plenary.job')
-local config = require('memos').config
+local Job = require("plenary.job")
+local config = require("memos").config
 
 local M = {}
 
+-- 【新增】URL 编码辅助函数
+local function url_encode(str)
+	if str then
+		str = string.gsub(str, "\n", "\r\n")
+		str = string.gsub(str, "([^%w %-%_%.%~])", function(c)
+			return string.format("%%%02X", string.byte(c))
+		end)
+		str = string.gsub(str, " ", "%%20")
+	end
+	return str
+end
+
 local function run_curl(args, on_exit)
-  table.insert(args, '-H')
-  table.insert(args, 'Authorization: Bearer ' .. config.token)
-  Job:new({ command = 'curl', args = args, on_exit = on_exit }):start()
+	table.insert(args, "-H")
+	table.insert(args, "Authorization: Bearer " .. config.token)
+	Job:new({ command = "curl", args = args, on_exit = on_exit }):start()
 end
 
 function M.get_current_user(callback)
-  run_curl({
-    '-s', '--fail', '-X', 'POST', config.host .. '/api/v1/auth/status',
-  }, function(job, return_val)
-    if return_val == 0 then
-      local result_string = table.concat(job:result(), "")
-      local data = vim.json.decode(result_string)
-      callback(data or nil)
-    else
-      vim.schedule(function() vim.notify("Failed to get user info.", vim.log.levels.ERROR) end)
-      callback(nil)
-    end
-  end)
+	run_curl({
+		"-s",
+		"--fail",
+		"-X",
+		"POST",
+		config.host .. "/api/v1/auth/status",
+	}, function(job, return_val)
+		if return_val == 0 then
+			local result_string = table.concat(job:result(), "")
+			local data = vim.json.decode(result_string)
+			callback(data or nil)
+		else
+			vim.schedule(function()
+				vim.notify("Failed to get user info.", vim.log.levels.ERROR)
+			end)
+			callback(nil)
+		end
+	end)
 end
 
 function M.list_memos(parent, filter, page_size, pageToken, callback)
-  local list_url = config.host .. '/api/v1/memos'
-  local params = {}
-  table.insert(params, "parent=" .. parent)
-  table.insert(params, "page_size=" .. tostring(page_size))
-  if pageToken and pageToken ~= "" then table.insert(params, "pageToken=" .. pageToken) end
-  if filter and filter ~= '' then
-    table.insert(params, 'filter=content.contains("' .. vim.fn.escape(filter, '\\"') .. '")')
-  end
-  list_url = list_url .. "?" .. table.concat(params, "&")
+	local list_url = config.host .. "/api/v1/memos"
+	local params = {}
+	table.insert(params, "parent=" .. parent)
+	table.insert(params, "page_size=" .. tostring(page_size))
+	if pageToken and pageToken ~= "" then
+		table.insert(params, "pageToken=" .. pageToken)
+	end
+	if filter and filter ~= "" then
+		-- 1. 构造原始的过滤字符串，例如：content.contains("hello world")
+		local raw_filter = 'content.contains("' .. vim.fn.escape(filter, '"') .. '")'
+		-- 2. 对整个值进行 URL 编码，变成：content.contains%28%22hello%20world%22%29
+		table.insert(params, "filter=" .. url_encode(raw_filter))
+	end
+	list_url = list_url .. "?" .. table.concat(params, "&")
 
-  run_curl({
-    '-s', '--fail', '-X', 'GET', list_url,
-  }, function(job, return_val)
-    if return_val == 0 then
-      local result_string = table.concat(job:result(), "")
-      local data = vim.json.decode(result_string)
-      callback({ memos = data.memos or {}, nextPageToken = data.nextPageToken or "" })
-    else
-      vim.schedule(function() vim.notify("Failed to fetch memos.", vim.log.levels.ERROR) end)
-      callback(nil)
-    end
-  end)
+	run_curl({
+		"-s",
+		"--fail",
+		"-X",
+		"GET",
+		list_url,
+	}, function(job, return_val)
+		if return_val == 0 then
+			local result_string = table.concat(job:result(), "")
+			local data = vim.json.decode(result_string)
+			callback({ memos = data.memos or {}, nextPageToken = data.nextPageToken or "" })
+		else
+			vim.schedule(function()
+				vim.notify("Failed to fetch memos.", vim.log.levels.ERROR)
+			end)
+			callback(nil)
+		end
+	end)
 end
 
 -- 【修改】让 create_memo 的回调函数返回新创建的 memo 对象
 function M.create_memo(content, callback)
-  local create_url = config.host .. '/api/v1/memos'
-  local json_data = vim.json.encode({ content = content })
-  run_curl({
-    '-s', '--fail', '-X', 'POST', create_url,
-    '-H', 'Content-Type: application/json',
-    '--data', json_data,
-  }, function(job, return_val)
-    if return_val == 0 then
-      local result_string = table.concat(job:result(), "")
-      local new_memo = vim.json.decode(result_string)
-      callback(new_memo)
-    else
-      callback(nil)
-    end
-  end)
+	local create_url = config.host .. "/api/v1/memos"
+	local json_data = vim.json.encode({ content = content })
+	run_curl({
+		"-s",
+		"--fail",
+		"-X",
+		"POST",
+		create_url,
+		"-H",
+		"Content-Type: application/json",
+		"--data",
+		json_data,
+	}, function(job, return_val)
+		if return_val == 0 then
+			local result_string = table.concat(job:result(), "")
+			local new_memo = vim.json.decode(result_string)
+			callback(new_memo)
+		else
+			callback(nil)
+		end
+	end)
 end
 
 function M.update_memo(memo_name, content, callback)
-  local update_url = config.host .. '/api/v1/' .. memo_name
-  local json_data = vim.json.encode({ content = content })
-  run_curl({
-    '-s', '--fail', '-X', 'PATCH', update_url,
-    '-H', 'Content-Type: application/json',
-    '--data', json_data,
-  }, function(job, return_val)
-    callback(return_val == 0)
-  end)
+	local update_url = config.host .. "/api/v1/" .. memo_name
+	local json_data = vim.json.encode({ content = content })
+	run_curl({
+		"-s",
+		"--fail",
+		"-X",
+		"PATCH",
+		update_url,
+		"-H",
+		"Content-Type: application/json",
+		"--data",
+		json_data,
+	}, function(job, return_val)
+		callback(return_val == 0)
+	end)
 end
 
 function M.delete_memo(memo_name, callback)
-  local delete_url = config.host .. '/api/v1/' .. memo_name
-  run_curl({
-    '-s', '--fail', '-X', 'DELETE', delete_url,
-  }, function(job, return_val)
-    callback(return_val == 0)
-  end)
+	local delete_url = config.host .. "/api/v1/" .. memo_name
+	run_curl({
+		"-s",
+		"--fail",
+		"-X",
+		"DELETE",
+		delete_url,
+	}, function(job, return_val)
+		callback(return_val == 0)
+	end)
 end
 
 return M
diff --git a/lua/memos/ui.lua b/lua/memos/ui.lua
index 1f1b4ce..8caecb5 100644
--- a/lua/memos/ui.lua
+++ b/lua/memos/ui.lua
@@ -14,6 +14,10 @@ function M.render_memos(data, append)
 		if not buf_id or not vim.api.nvim_buf_is_valid(buf_id) then
 			return
 		end
+		if not data then
+			vim.notify("API returned no data.", vim.log.levels.WARN)
+			return
+		end
 		local new_memos = data.memos or {}
 		current_page_token = data.nextPageToken or ""
 		if append then