emrg: force proxy=None for loopback daemon connection

Agent.md

@@ -118,7 +118,7 @@ Community needs voiced in HN agent-UI discussions map directly to EMRG's design:
 pkill -f "emrg.server"; rm -f ~/.emrg/emrgd.port; python -m emrg
 ```
 
-Python: `uv run pytest tests/ -v` (806) — import check: `uv run python -c "from emrg.client.app import run_client"`
+Python: `uv run pytest tests/ -v` (807) — import check: `uv run python -c "from emrg.client.app import run_client"`
 GUI: `cd emrg/gui && npm test` (246: 44 daemon_client + 19 conn-manager + 22 app-commands + 121 renderer smoke + 16 i18n + 7 integration + 3 commands + 5 build-config + 7 gui-state + 2 tool-group) — syntax: `node --check main.js preload.js daemon_client.js renderer/js/*.js`
 CI: `uv run pytest` (ubuntu + **windows-2025 matrix** — Windows pytest 回归在 PR CI 即失败，v0.2.29 教训 #725) + GUI tests + **actionlint workflow lint** (`rhysd/actionlint@v1.7.12` gate, #444 — workflow 解析错误在 PR CI 即失败，如 `if:` secrets 上下文)
 Re-trigger: `scripts/re-trigger-ci.sh [branch]` (workflow_dispatch, #527 — 替代空 commit 重触发：Actions outage 会整段丢弃 push 事件，dispatch 走 API 路径不受影响)

emrg/connect.py

@@ -60,8 +60,16 @@ async def connect_to_server():
     """
     port_path = Path(get_server_path())
     port, token = port_path.read_text(encoding="utf-8").split()
+    # proxy=None: loopback connections must never go through a system proxy.
+    # websockets 17 defaults proxy=True and reads the OS proxy settings — when a
+    # Windows system proxy is enabled (e.g. 10.10.0.28:6501 for HN/Reddit access),
+    # the ws://127.0.0.1 handshake is sent to the proxy → InvalidMessage → all
+    # Python clients (TUI `emrg`, scheduler internal connections) cannot reach the
+    # local daemon, while the Node.js GUI is unaffected (2026-08-14 incident; root
+    # cause of continuous emrg-task/emrg-promote-task crashes since 2026-08-13).
     ws = await connect(
         f"ws://127.0.0.1:{port}",
+        proxy=None,
         max_size=16 * 1024 * 1024,
     )
     await ws.send(json.dumps({"type": "auth", "token": token}))

tests/test_connect.py

@@ -1,5 +1,7 @@
 """Tests for connect module — WebSocket IPC connection layer (Phase 1)."""
 
+import asyncio
+import json
 from pathlib import Path
 
 from emrg.connect import CONNECT_ID, AuthError, cleanup_server, get_server_path, is_server_running_sync
@@ -77,3 +79,42 @@ def test_false_when_connection_refused(self, monkeypatch, tmp_path):
         (tmp_path / f"{CONNECT_ID}.port").write_text("1\nno-token", encoding="utf-8")
 
         assert is_server_running_sync(timeout=0.1) is False
+
+
+class TestConnectToServer:
+    def test_connect_uses_proxy_none(self, monkeypatch, tmp_path):
+        """Loopback WS must never route through a system proxy.
+
+        websockets 17 defaults proxy=True and reads the OS proxy settings; when a
+        Windows system proxy is configured, the ws://127.0.0.1 handshake is sent
+        to the proxy → InvalidMessage → Python clients cannot reach the local
+        daemon (2026-08-14 incident). proxy=None pins direct loopback.
+        """
+        from emrg import connect as connect_mod
+
+        captured = {}
+
+        class FakeWS:
+            async def send(self, data):
+                self.sent = data
+
+            async def recv(self):
+                return json.dumps({"type": "auth_ok"})
+
+            async def close(self):
+                pass
+
+        async def fake_connect(uri, **kwargs):
+            captured["uri"] = uri
+            captured["kwargs"] = kwargs
+            return FakeWS()
+
+        monkeypatch.setattr(connect_mod, "config_dir", lambda: tmp_path)
+        monkeypatch.setattr(connect_mod, "connect", fake_connect)
+        (tmp_path / f"{CONNECT_ID}.port").write_text("49152\ntoken", encoding="utf-8")
+
+        asyncio.run(connect_mod.connect_to_server())
+
+        assert captured["uri"] == "ws://127.0.0.1:49152"
+        assert captured["kwargs"]["proxy"] is None
+        assert captured["kwargs"]["max_size"] == 16 * 1024 * 1024