feat(bridge): add wifi/serial bridge runtime and UI

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/test_pi_wifi_scan.py

@@ -0,0 +1,66 @@
+#!/usr/bin/env python3
+"""Tests for nmcli Wi‑Fi scan parsing."""
+
+from __future__ import annotations
+
+import sys
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[1]
+sys.path.insert(0, str(ROOT / "src"))
+
+from util.pi_wifi import _unescape_nmcli  # noqa: E402
+
+
+def test_unescape_nmcli():
+    assert _unescape_nmcli("bridge\\:abc") == "bridge:abc"
+    assert _unescape_nmcli("plain") == "plain"
+
+
+def test_interface_display_name_fallback(monkeypatch):
+    from util import pi_wifi
+
+    monkeypatch.setattr(
+        pi_wifi,
+        "_interface_display_name",
+        lambda device: "Test Wi‑Fi" if device == "wlan0" else device,
+    )
+    import subprocess
+
+    def fake_run(*args, **kwargs):
+        class _R:
+            stdout = "wlan0:wifi:connected:HomeNet\neth0:ethernet:connected:\n"
+
+        return _R()
+
+    monkeypatch.setattr(subprocess, "run", fake_run)
+    ifaces = pi_wifi.list_wifi_interfaces()
+    assert len(ifaces) == 1
+    assert ifaces[0]["device"] == "wlan0"
+    assert ifaces[0]["label"] == "Test Wi‑Fi"
+    assert ifaces[0]["connection"] == "HomeNet"
+
+
+def test_scan_wifi_parses_terse_nmcli(monkeypatch):
+    import asyncio
+
+    from util import pi_wifi
+
+    sample = "\n".join(
+        [
+            "bridge-588c81a2fc18:84:",
+            "My Network:72:WPA2",
+            ":50:WPA2",
+            "led:100:WPA2",
+        ]
+    )
+
+    async def fake_run(*args, **kwargs):
+        return 0, sample, ""
+
+    monkeypatch.setattr(pi_wifi, "_run_nmcli", fake_run)
+
+    networks = asyncio.run(pi_wifi.scan_wifi("wlan0"))
+    ssids = [n["ssid"] for n in networks]
+    assert ssids == ["led", "bridge-588c81a2fc18", "My Network"]
+    assert networks[0]["signal"] == 100