feat(i18n): internationalize flowchat welcome panel text

src/web-ui/src/flow_chat/components/WelcomePanel.tsx

@@ -74,28 +74,28 @@ export const WelcomePanel: React.FC<WelcomePanelProps> = ({
     if (!gitState) return null;
     const parts: { key: string; label: string; suffix: string }[] = [];
     if (gitState.unstagedFiles > 0)
-      parts.push({ key: 'unstaged', label: `${gitState.unstagedFiles} 个文件`, suffix: '等待暂存' });
+      parts.push({ key: 'unstaged', label: t('welcome.gitUnstaged', { count: gitState.unstagedFiles }), suffix: t('welcome.waitingToStage') });
     if (gitState.stagedFiles > 0)
-      parts.push({ key: 'staged', label: `${gitState.stagedFiles} 个文件`, suffix: '已暂存待提交' });
+      parts.push({ key: 'staged', label: t('welcome.gitStaged', { count: gitState.stagedFiles }), suffix: t('welcome.stagedReady') });
     if (gitState.unpushedCommits > 0)
-      parts.push({ key: 'unpushed', label: `${gitState.unpushedCommits} 个提交`, suffix: '待推送' });
+      parts.push({ key: 'unpushed', label: t('welcome.gitUnpushed', { count: gitState.unpushedCommits }), suffix: t('welcome.toPush') });
     if (parts.length === 0) return null;
     return (
       <>
-        目前有{' '}
+        {t('welcome.currentlyHas')}
         {parts.map(({ key, label, suffix }, i) => (
           <React.Fragment key={key}>
-            {i > 0 && '，'}
+            {i > 0 && t('welcome.commaSeparator')}
             <button type="button" className="welcome-panel__inline-btn" onClick={handleGitClick}>
               {label}
             </button>
             {' '}{suffix}
           </React.Fragment>
         ))}
-        。
+        {t('welcome.period')}
       </>
     );
-  }, [gitState, handleGitClick]);
+  }, [gitState, handleGitClick, t]);
 
   const loadGitState = useCallback(async (workspacePath: string) => {
     try {
@@ -179,20 +179,20 @@ export const WelcomePanel: React.FC<WelcomePanelProps> = ({
           <p className="welcome-panel__narrative-text">
             {!hasWorkspace ? (
               <>
-                还没有选择项目，
+                {t('welcome.noWorkspaceHint')}
                 <button
                   type="button"
                   className="welcome-panel__inline-btn"
                   onClick={() => { void handleOpenOtherFolder(); }}
                   disabled={isSelectingWorkspace}
                 >
-                  打开一个
+                  {t('welcome.openOne')}
                 </button>
-                {' '}开始吧。
+                {' '}{t('welcome.toStart')}
               </>
             ) : (
               <>
-                我们正在
+                {isCoworkSession ? t('welcome.workingInCowork') : t('welcome.workingIn')}{' '}
                 <span className="welcome-panel__context-row">
                   <span className="welcome-panel__workspace-anchor" ref={workspaceDropdownRef}>
                     <button
@@ -250,15 +250,15 @@ export const WelcomePanel: React.FC<WelcomePanelProps> = ({
                 </span>
                 {!isCoworkSession && gitState ? (
                   <>
-                    工作。
+                    {t('welcome.project')}
                     <br />
                     {isGitClean
-                      ? <span className="welcome-panel__narrative-clean">一切干净，可以放手大干了 ✦</span>
+                      ? <span className="welcome-panel__narrative-clean">{t('welcome.gitClean')}</span>
                       : buildGitNarrative()
                     }
                   </>
                 ) : (
-                  <>项目里工作。</>
+                  <>{t('welcome.projectCowork')}</>
                 )}
               </>
             )}

src/web-ui/src/locales/en-US/flow-chat.json

@@ -787,7 +787,24 @@
     "defaultAction3Command": "Start a new feature",
     "workspace": "Workspace",
     "noWorkspace": "No workspace open",
-    "openOtherProject": "Open other project..."
+    "openOtherProject": "Open other project...",
+    "noWorkspaceHint": "No project selected yet",
+    "openOne": "Open one",
+    "toStart": "to get started.",
+    "workingIn": "We are working in",
+    "workingInCowork": "Working in",
+    "gitClean": "All clean, ready to get to work ✦",
+    "gitUnstaged": "{{count}} file(s)",
+    "gitStaged": "{{count}} file(s)",
+    "gitUnpushed": "{{count}} commit(s)",
+    "waitingToStage": "waiting to stage",
+    "stagedReady": "staged and ready to commit",
+    "toPush": "to push",
+    "currentlyHas": "Currently there ",
+    "commaSeparator": ", ",
+    "period": ".",
+    "project": "working.",
+    "projectCowork": "working in the project."
   },
   "modelSelector": {
     "model": "Model",

src/web-ui/src/locales/zh-CN/flow-chat.json

@@ -781,7 +781,25 @@
     "defaultAction3Command": "开始新功能",
     "workspace": "工作区",
     "noWorkspace": "未打开工作区",
-    "openOtherProject": "打开其他项目..."
+    "openOtherProject": "打开其他项目...",
+    "noWorkspaceHint": "还没有选择项目",
+    "openOne": "打开一个",
+    "toStart": "开始吧。",
+    "workingIn": "我们正在",
+    "project": "项目里工作。",
+    "workingInCowork": "在",
+    "gitClean": "一切干净，可以放手大干了 ✦",
+    "gitUnstaged": "{{count}} 个文件",
+    "gitStaged": "{{count}} 个文件",
+    "gitUnpushed": "{{count}} 个提交",
+    "waitingToStage": "等待暂存",
+    "stagedReady": "已暂存待提交",
+    "toPush": "待推送",
+    "currentlyHas": "目前有",
+    "commaSeparator": "，",
+    "period": "。",
+    "project": "工作。",
+    "projectCowork": "项目里工作。"
   },
   "modelSelector": {
     "model": "模型",