pi 可用性修正：bootstrap 狀態回報 pi 版本與 Node 版本（pi 1.x 需 Node>=22.19，build.sh 已依 Node 版本選擇 legacy-node20）

app.py

@@ -1272,11 +1272,26 @@ async def api_bootstrap_status():
             llama_ok = r.status_code == 200
     except Exception:
         llama_ok = False
+    # pi 是否真的能執行（不只是檔案存在）；舊版 Node 20 裝到 pi 1.x 會啟動即崩潰。
+    pi_bin = shutil.which("pi") or os.path.join(HOME, ".local", "bin", "pi")
+    pi_version = None
+    try:
+        proc = await asyncio.create_subprocess_exec(
+            pi_bin, "--version",
+            stdout=asyncio.subprocess.PIPE, stderr=asyncio.subprocess.STDOUT,
+        )
+        out, _ = await asyncio.wait_for(proc.communicate(), timeout=20)
+        if proc.returncode == 0:
+            pi_version = out.decode(errors="replace").strip().splitlines()[0]
+    except Exception:
+        pi_version = None
     return {
         "s5p_dir": s5p_dir,
         "s5p_installed": os.path.isfile(os.path.join(s5p_dir, "oshopencode.py")),
         "oshopencode_wrapper": shutil.which("oshopencode.py"),
         "pi_config": os.path.isfile(pi_cfg),
+        "pi_version": pi_version,
+        "node_version": (await _run("node -v"))[1].strip() or None,
         "llama_server_20000": llama_ok,
         "disk_free_gib": disk_free_gib,
         "bootstrap_log": BOOTSTRAP_LOG,