fix(electrobun): native folder picker dialog replaces inline PathBrowser

- Uses Electrobun's Utils.openFileDialog (canChooseDirectory: true)
- files.pickDirectory + files.homeDir RPC handlers
- ProjectWizard: 📂 button opens native OS dialog
- Removed broken inline PathBrowser (process.env.HOME not in WebView)

ui-electrobun/src/bun/index.ts

@@ -6,7 +6,7 @@
  */
 
 import fs from "fs";
-import { BrowserWindow, BrowserView, Updater } from "electrobun/bun";
+import { BrowserWindow, BrowserView, Updater, Utils } from "electrobun/bun";
 import { PtyClient } from "./pty-client.ts";
 import { settingsDb } from "./settings-db.ts";
 import { sessionDb } from "./session-db.ts";
@@ -128,6 +128,24 @@ const rpc = BrowserView.defineRPC<PtyRPCSchema>({
       // Git
       ...gitHandlers,
 
+      // Native folder picker dialog
+      "files.pickDirectory": async ({ startingFolder }) => {
+        try {
+          const paths = await Utils.openFileDialog({
+            startingFolder: startingFolder || "~/",
+            canChooseFiles: false,
+            canChooseDirectory: true,
+            allowsMultipleSelection: false,
+          });
+          return { path: paths?.[0] ?? null };
+        } catch { return { path: null }; }
+      },
+
+      // Home directory
+      "files.homeDir": async () => {
+        return { path: process.env.HOME || "/home" };
+      },
+
       // Project templates (hardcoded list)
       "project.templates": async () => ({
         templates: [