gui: fix plural forms and notice strings caught by CI e2e

Folder-count summary gets _one/_other; keyboard shortcuts register at commit
so early input isn't dropped during boot; restores main's copy for the
files-location help and the onboarding signed-in line.

surfaces/gui/src/App.tsx

@@ -1,4 +1,4 @@
-import { useCallback, useEffect, useRef, useState, type PointerEvent } from "react";
+import { useCallback, useEffect, useLayoutEffect, useRef, useState, type PointerEvent } from "react";
 import { useTranslation } from "react-i18next";
 import {
   announceInboxUnlock,
@@ -347,7 +347,10 @@ export function App() {
       navBeforePreview.current = null;
     }
   }, []);
-  useEffect(() => {
+  // Layout effect on purpose: a passive effect registers after paint, leaving a boot-splash
+  // window where the app is visible but ⌘B/⌘, are dead (input arriving right after load was
+  // dropped). Registering at commit closes that gap.
+  useLayoutEffect(() => {
     const onKey = (e: KeyboardEvent) => {
       if ((e.metaKey || e.ctrlKey) && e.key.toLowerCase() === "b") {
         e.preventDefault();

surfaces/gui/src/components/Onboarding.tsx

@@ -282,7 +282,9 @@ export function Onboarding({ onDone }: { onDone: (next?: "work" | "gallery" | "a
                 data-testid="ob-tools-signedin"
               >
                 <span className="block text-[13px] font-semibold text-ok mb-0.5">
-                  {t("onboarding.signed_in_as", { account: cloud.account ? ` ${cloud.account}` : "" })}
+                  {cloud.account
+                    ? t("onboarding.signed_in_as", { account: cloud.account })
+                    : t("onboarding.signed_in")}
                 </span>
                 <span className="block text-[13px] text-muted">
                   {t("onboarding.signed_in_desc")}

surfaces/gui/src/locales/en.json

@@ -313,7 +313,7 @@
     "personas_intro": "Manage your coworkers and add new ones.",
     "scratch_placeholder": "~/OpenWorker",
     "files_browse": "Browse…",
-    "files_help": "The scratch space where coworkers save produced files. Override per session.",
+    "files_help": "Each conversation gets its own folder under this location. Existing conversations keep their current folder; you can grant access to more folders inside any conversation.",
     "files_pick_folder": "Pick a folder",
     "files_save": "Save",
     "files_save_error": "Couldn't save.",
@@ -683,14 +683,15 @@
     "channels_note": "The agent receives messages posted to these channels. Removing one stops this session from listening — the connector stays connected.",
     "summary_no_sources": "no sources",
     "summary_sources_more": "{{first}} +{{more}}",
-    "summary_folder_count": "{{count}} folders",
     "summary_join": "{{sources}} · {{folder}}",
     "addfolder_path_placeholder": "Choose or paste a folder path…",
     "allow_writes": "Allow writing (read-write)",
     "allow_writes_help": "When granted, the agent can read and write files in this folder.",
     "cancel": "Cancel",
     "choose_location": "Choose location",
-    "channel_add_error": "Couldn't add that channel."
+    "channel_add_error": "Couldn't add that channel.",
+    "summary_folder_count_one": "{{count}} folder",
+    "summary_folder_count_other": "{{count}} folders"
   },
   "root": {
     "temporary_space": "Temporary folder",
@@ -1244,7 +1245,7 @@
     "opening_browser": "Opening browser…",
     "replay_hint": "Replay this setup anytime: Settings ▸ Appearance ▸ Run setup again.",
     "sign_in": "Sign in",
-    "signed_in_as": "🎉 You're signed in{{account}}",
+    "signed_in_as": "🎉 You’re signed in as {{account}}",
     "signed_in_desc": "Connect a tool above with one click — or add them anytime later from the Connectors page.",
     "signin_band_desc": "OpenWorker handles the OAuth for 20+ tools — no dev consoles, no pasted keys. Tokens stay on this computer.",
     "signin_for_oneclick": "Sign in for one-click connections",
@@ -1266,7 +1267,8 @@
     "tool_hubspot_benefit": "Keep the CRM current",
     "tool_hubspot_detail": "HubSpot — update deals, log notes, prep calls.",
     "tool_attio_benefit": "Track every relationship",
-    "tool_attio_detail": "Attio — search records, read timelines, log notes."
+    "tool_attio_detail": "Attio — search records, read timelines, log notes.",
+    "signed_in": "🎉 You’re signed in"
   },
   "persona": {
     "about": "About",

surfaces/gui/src/locales/zh.json

@@ -306,7 +306,7 @@
     "personas_intro": "管理你的同事，并添加新同事。",
     "scratch_placeholder": "~/OpenWorker",
     "files_browse": "浏览…",
-    "files_help": "同事保存产出文件的临时目录。可在每会话中覆盖。",
+    "files_help": "每个会话都会在此位置下获得自己的文件夹。已有会话保留当前文件夹；你可以在任意会话中授予更多文件夹的访问权限。",
     "files_pick_folder": "选择文件夹",
     "files_save": "保存",
     "files_save_error": "无法保存。",
@@ -673,14 +673,14 @@
     "channels_note": "agent 会接收发布到这些频道的消息。移除一个会停止本会话的监听 —— 连接器保持连接。",
     "summary_no_sources": "无来源",
     "summary_sources_more": "{{first}} +{{more}}",
-    "summary_folder_count": "{{count}} 个文件夹",
     "summary_join": "{{sources}} · {{folder}}",
     "addfolder_path_placeholder": "选择或粘贴文件夹路径…",
     "allow_writes": "允许写入（读写）",
     "allow_writes_help": "授予后，agent 可在该文件夹中读写文件。",
     "cancel": "取消",
     "choose_location": "选择位置",
-    "channel_add_error": "无法添加该频道。"
+    "channel_add_error": "无法添加该频道。",
+    "summary_folder_count_other": "{{count}} 个文件夹"
   },
   "root": {
     "temporary_space": "临时文件夹",
@@ -1229,7 +1229,7 @@
     "opening_browser": "正在打开浏览器…",
     "replay_hint": "随时重放此设置：设置 ▸ 外观 ▸ 重新运行引导。",
     "sign_in": "登录",
-    "signed_in_as": "🎉 你已登录{{account}}",
+    "signed_in_as": "🎉 你已登录：{{account}}",
     "signed_in_desc": "上方任意工具一键连接 —— 或稍后随时在连接器页面添加。",
     "signin_band_desc": "OpenWorker 代为处理 20+ 工具的 OAuth —— 无需开发者控制台、无需粘贴密钥。令牌保留在本机。",
     "signin_for_oneclick": "登录即可一键连接",
@@ -1251,7 +1251,8 @@
     "tool_hubspot_benefit": "保持 CRM 数据最新",
     "tool_hubspot_detail": "HubSpot —— 更新商机、记录笔记、准备通话。",
     "tool_attio_benefit": "跟进每一段客户关系",
-    "tool_attio_detail": "Attio —— 搜索记录、查看时间线、记录笔记。"
+    "tool_attio_detail": "Attio —— 搜索记录、查看时间线、记录笔记。",
+    "signed_in": "🎉 你已登录"
   },
   "persona": {
     "about": "关于",