feat(settings): support workspace directory switching

apps/ui/src/App.tsx

@@ -948,6 +948,7 @@ const mockDesktopApi = {
         }
       }
     }),
+    pickWorkspaceDirectory: async (currentPath?: string) => currentPath || "D:/workspace",
     save: async (input: SaveConfigInput) => ({
       setupMode: input.setupMode,
       provider: input.provider,
@@ -2036,6 +2037,7 @@ export default function App() {
   const copiedTokenResetRef = useRef<number | null>(null);
   const composerDragDepthRef = useRef(0);
   const startupWarmupRequestedRef = useRef(false);
+  const lastLoadedWorkspacePathRef = useRef<string | null>(null);
   const [streamSmoke, setStreamSmoke] = useState<SmokeStreamSnapshot | null>(null);
   const minimizeWindow = () => void desktopApi.window.minimize();
   const maximizeWindow = () => void desktopApi.window.maximize();
@@ -2044,6 +2046,9 @@ export default function App() {
   const effectiveSkills = useMemo(() => (readySkills.length ? [DEFAULT_SKILL, ...readySkills] : [DEFAULT_SKILL]), [readySkills]);
   const selectedSkill = useMemo(() => effectiveSkills.find((skill) => skill.id === selectedSkillId) ?? effectiveSkills[0] ?? DEFAULT_SKILL, [effectiveSkills, selectedSkillId]);
   const setupMode = workspace?.setupMode ?? config?.setupMode ?? "employee-key";
+  const savedWorkspacePath = config?.workspacePath ?? "";
+  const displayedWorkspacePath = workspacePathDraft.trim() || savedWorkspacePath || ui.none;
+  const hasPendingWorkspacePathChange = Boolean(config && workspacePathDraft.trim() && workspacePathDraft.trim() !== savedWorkspacePath);
   const shellReady = workspace?.shellReady ?? false;
   const bindingRequired = workspace?.bindingRequired ?? !Boolean(workspace?.apiKeyConfigured ?? config?.apiKeyConfigured);
   const chatLaunchState: ChatLaunchState = workspace?.chatLaunchState ?? (!bindingRequired ? "starting" : "unbound");
@@ -2305,7 +2310,6 @@ export default function App() {
       setRuntimeTelemetry(nextTelemetry);
       setSystemSummary(nextSystem);
       setExpertDefinitions(nextExperts);
-      setWorkspacePathDraft((current) => current || nextConfig.workspacePath);
       setGatewayStatus(statusResult);
 
       const nextReadySkills = nextWorkspace.skills.filter((skill) => skill.ready);
@@ -2504,7 +2508,14 @@ export default function App() {
       return;
     }
 
-    setWorkspacePathDraft(config.workspacePath);
+    setWorkspacePathDraft((current) => {
+      const lastLoadedWorkspacePath = lastLoadedWorkspacePathRef.current;
+      lastLoadedWorkspacePathRef.current = config.workspacePath;
+      if (!current || current === lastLoadedWorkspacePath) {
+        return config.workspacePath;
+      }
+      return current;
+    });
     setImageModelBaseUrlDraft(config.expertModelConfig.image.baseUrl);
     setImageModelIdDraft(config.expertModelConfig.image.modelId ?? FIXED_EXPERT_MODEL_ENDPOINTS.image.modelId);
     setVideoModelBaseUrlDraft(config.expertModelConfig.video.baseUrl);
@@ -3381,6 +3392,7 @@ export default function App() {
     lobsterKey?: string;
     workspacePath?: string;
     expertModelConfig?: SaveConfigInput["expertModelConfig"];
+    successMessage?: string;
   }) {
     if (!config) {
       return;
@@ -3435,7 +3447,7 @@ export default function App() {
       setDigitalHumanVolcSecretKeyDraft("");
       setDigitalHumanQiniuAccessKeyDraft("");
       setDigitalHumanQiniuSecretKeyDraft("");
-      setInfoText(trimmedLobsterKey ? ui.saveSuccessPending : ui.saveSuccessApplied);
+      setInfoText(options?.successMessage ?? (trimmedLobsterKey ? ui.saveSuccessPending : ui.saveSuccessApplied));
       void refresh(false);
     } catch (error) {
       setErrorText(err(error));
@@ -4079,6 +4091,46 @@ export default function App() {
     }
   }
 
+  async function pickWorkspaceDirectory() {
+    if (!config || saving) {
+      return;
+    }
+
+    setErrorText("");
+    try {
+      const nextPath = await desktopApi.config.pickWorkspaceDirectory(workspacePathDraft.trim() || config.workspacePath);
+      if (!nextPath?.trim()) {
+        return;
+      }
+
+      setWorkspacePathDraft(nextPath.trim());
+      setInfoText("");
+    } catch (error) {
+      setErrorText(err(error));
+    }
+  }
+
+  function restoreWorkspaceDirectory() {
+    if (!config) {
+      return;
+    }
+
+    setWorkspacePathDraft(config.workspacePath);
+    setErrorText("");
+    setInfoText("");
+  }
+
+  async function saveWorkspaceDirectory() {
+    if (!hasPendingWorkspacePathChange) {
+      return;
+    }
+
+    await saveConfig({
+      workspacePath: workspacePathDraft,
+      successMessage: "工作目录已保存，正在重新预热工作区。"
+    });
+  }
+
   const sidebarSessionLabel = viewMode === "experts" ? "专家会话" : "会话管理";
   const selectedSkillBadge = selectedSkillId === DEFAULT_SKILL.id ? "千匠问天" : "@" + selectedSkill.name;
   const sidebarNewSessionAction = (
@@ -4905,30 +4957,27 @@ export default function App() {
                   <div className="settings-section-headline">
                     <div>
                       <span className="settings-section-kicker">诊断与工作区</span>
-                      <h4>{ui.diagnostics}</h4>
-                      <p>{ui.diagnosticsDesc}</p>
                     </div>
                   </div>
-                  <div className="settings-static-list">
-                    <div className="settings-static-item">
-                      <span>{ui.workspacePath}</span>
-                      <strong>{config?.workspacePath || workspacePathDraft || ui.none}</strong>
+                  <div className="workspace-directory-card">
+                    <div className="workspace-directory-panel">
+                      <span className="workspace-directory-eyebrow">当前生效目录</span>
+                      <strong className="workspace-directory-path">{displayedWorkspacePath}</strong>
+                      <p className="workspace-directory-hint">项目会从该目录加载；保存后会重新预热工作区。</p>
                     </div>
-                  </div>
-                  <div className="diagnostic-meta-list">
-                    {runtimeCloudStatus ? (
-                      <>
-                        <div className="mini-info"><span>Runtime Cloud Target</span><strong>{runtimeCloudStatus.baseUrl || ui.none}</strong></div>
-                        <div className="mini-info"><span>Target Source</span><strong>{runtimeCloudStatus.baseUrlSource ?? ui.none}</strong></div>
-                        <div className="mini-info"><span>Binding Host</span><strong>{runtimeCloudStatus.baseHost ?? ui.none}</strong></div>
-                      </>
+                    {hasPendingWorkspacePathChange ? (
+                      <div className="workspace-directory-draft-row">
+                        <span className="workspace-directory-draft-badge">待保存</span>
+                        <div className="workspace-directory-inline-actions">
+                          <button disabled={saving} onClick={() => void saveWorkspaceDirectory()}>{saving ? ui.saving : ui.save}</button>
+                          <button className="secondary workspace-directory-inline-button" disabled={saving} onClick={restoreWorkspaceDirectory}>恢复当前</button>
+                        </div>
+                      </div>
                     ) : null}
                   </div>
-                  <div className="button-row settings-actions">
-                    <button className="secondary" onClick={() => void handleCopyText("workspace-path", config?.workspacePath || workspacePathDraft || ui.none)}>
-                      {copiedToken === "workspace-path" ? ui.copied : ui.copy}
-                    </button>
-                    <button className="secondary" onClick={() => void exportDiagnostics()}>{ui.export}</button>
+                  <div className="button-row settings-actions workspace-directory-actions">
+                    <button disabled={saving || !config} onClick={() => void pickWorkspaceDirectory()}>更改目录</button>
+                    <button className="secondary" disabled={saving} onClick={() => void exportDiagnostics()}>{ui.export}</button>
                   </div>
                 </div>
               </section>

packages/shared-types/src/index.ts

@@ -20,6 +20,7 @@
   runtimeCloudFetchConfig: "runtime-cloud:fetch-config",
   runtimeTelemetryGetStatus: "runtime-telemetry:get-status",
   configLoad: "config:load",
+  configPickWorkspaceDirectory: "config:pick-workspace-directory",
   configSave: "config:save",
   projectsList: "projects:list",
   projectsSetActive: "projects:set-active",
@@ -802,6 +803,7 @@ export interface DesktopApi {
   };
   config: {
     load(): Promise<AppConfig>;
+    pickWorkspaceDirectory(currentPath?: string): Promise<string | null>;
     save(input: SaveConfigInput): Promise<AppConfig>;
   };
   projects: {