Add a native workspace directory picker to onboarding

Onboarding only accepted a typed workspace path, which is error-prone and
diverged from the original wizard. Add a pickDirectory IPC backed by Electron's
open-directory dialog and a Choose button beside the path field, so the founder
can select a real folder for agent artifacts.

AgentCompany-New/src/main/app/ipc-handlers.ts

@@ -1,4 +1,4 @@
-import { ipcMain, shell, type BrowserWindow } from "electron";
+import { dialog, ipcMain, shell, type BrowserWindow } from "electron";
 import type { DatabaseConnection } from "../database/connection";
 import { IPC_CHANNELS } from "../../shared/ipc";
 import { fail, ok, type DesktopResult } from "../../shared/result";
@@ -196,6 +196,16 @@ export function registerIpcHandlers(deps: IpcDeps): void {
     }
   });
 
+  ipcMain.handle(IPC_CHANNELS.pickDirectory, async () => {
+    try {
+      const result = await dialog.showOpenDialog(deps.mainWindow, { properties: ["openDirectory", "createDirectory"] });
+      if (result.canceled || result.filePaths.length === 0) return ok(null);
+      return ok(result.filePaths[0]);
+    } catch (error) {
+      return fail("pick_directory_failed", error instanceof Error ? error.message : String(error));
+    }
+  });
+
   ipcMain.handle(IPC_CHANNELS.createMigrationReport, (_event, input) => mutate(() => migrations.createReport(input)));
   ipcMain.handle(IPC_CHANNELS.createRollbackSnapshot, (_event, input) => mutate(() => rollback.createSnapshot(input)));
   ipcMain.handle(IPC_CHANNELS.setRollbackSnapshotActive, (_event, input) => mutate(() => rollback.setActive(input)));

AgentCompany-New/src/preload/index.ts

@@ -43,6 +43,7 @@ const api: DesktopApi = {
   createScheduledPost: (input) => invoke(IPC_CHANNELS.createScheduledPost, input),
   setScheduledPostState: (input) => invoke(IPC_CHANNELS.setScheduledPostState, input),
   importFile: (input) => invoke(IPC_CHANNELS.importFile, input),
+  pickDirectory: () => invoke(IPC_CHANNELS.pickDirectory),
   setFilePinned: (input) => invoke(IPC_CHANNELS.setFilePinned, input),
   createMigrationReport: (input) => invoke(IPC_CHANNELS.createMigrationReport, input),
   createRollbackSnapshot: (input) => invoke(IPC_CHANNELS.createRollbackSnapshot, input),

AgentCompany-New/src/renderer/src/app/Onboarding.tsx

@@ -312,6 +312,11 @@ function authBadge(authType: string): string {
 }
 
 function CompanyStep({ draft, onChange, onBack, onNext }: StepProps) {
+  const chooseWorkspace = () => {
+    void window.agentCompany.pickDirectory().then((result) => {
+      if (result.ok && result.data) onChange({ workspacePath: result.data });
+    });
+  };
   return (
     <div className="form-grid">
       <h2 className="page-h1">Company</h2>
@@ -325,7 +330,10 @@ function CompanyStep({ draft, onChange, onBack, onNext }: StepProps) {
         <textarea className="input" value={draft.companyDescription} onChange={(event) => onChange({ companyDescription: event.target.value })} required />
       </Field>
       <Field label="Workspace path (optional)">
-        <input className="input" value={draft.workspacePath} onChange={(event) => onChange({ workspacePath: event.target.value })} />
+        <div className="row" style={{ gap: 6 }}>
+          <input className="input" value={draft.workspacePath} onChange={(event) => onChange({ workspacePath: event.target.value })} placeholder="Choose a folder for agent artifacts" />
+          <Button tone="ghost" onClick={chooseWorkspace}><Icon name="folder" size={13} /> Choose</Button>
+        </div>
       </Field>
       <Actions onBack={onBack} onNext={onNext} />
     </div>

AgentCompany-New/src/shared/desktop-api.ts

@@ -97,6 +97,7 @@ export interface DesktopApi {
   createScheduledPost(input: CreateScheduledPostInput): Promise<DesktopResult<AppSnapshot>>;
   setScheduledPostState(input: SetScheduledPostStateInput): Promise<DesktopResult<AppSnapshot>>;
   importFile(input: ImportFileInput): Promise<DesktopResult<AppSnapshot>>;
+  pickDirectory(): Promise<DesktopResult<string | null>>;
   setFilePinned(input: SetFilePinnedInput): Promise<DesktopResult<AppSnapshot>>;
   createMigrationReport(input: CreateMigrationReportInput): Promise<DesktopResult<AppSnapshot>>;
   createRollbackSnapshot(input: CreateRollbackSnapshotInput): Promise<DesktopResult<AppSnapshot>>;

AgentCompany-New/src/shared/ipc.ts

@@ -35,6 +35,7 @@ export const IPC_CHANNELS = {
   createScheduledPost: "agentcompany:create-scheduled-post",
   setScheduledPostState: "agentcompany:set-scheduled-post-state",
   importFile: "agentcompany:import-file",
+  pickDirectory: "agentcompany:pick-directory",
   setFilePinned: "agentcompany:set-file-pinned",
   createMigrationReport: "agentcompany:create-migration-report",
   createRollbackSnapshot: "agentcompany:create-rollback-snapshot",