test(remote): add unit + e2e suite for remote-services subsystem

Covers RemoteClient/RemoteService, REST routes, handlers, SessionStore, InputBridge, DownloadQueueManager, errors, compression, and serve CLI. E2e tier opts in via --live and can auto-spawn its own serve.

tests/remote/e2e/test_live_input_bridge.py

@@ -0,0 +1,46 @@
+"""E2E: interactive auth prompt round-trip.
+
+For services that don't naturally prompt during ``authenticate()``, the
+test still verifies the GET prompt endpoint returns the documented
+shape (empty when no prompt pending).
+"""
+
+from __future__ import annotations
+
+import pytest
+
+pytestmark = [pytest.mark.live, pytest.mark.slow]
+
+
+def test_prompt_endpoint_shape_without_pending(http_session, server_url: str, service_case) -> None:
+    service, conf = service_case
+    r = http_session.post(
+        f"{server_url}/api/session/create",
+        json={"service": service, "title_id": conf["title_url"]},
+        timeout=120,
+    )
+    if r.status_code >= 400:
+        pytest.skip(f"{service}: session creation failed: {r.status_code}")
+    sid = r.json()["session_id"]
+    try:
+        pr = http_session.get(f"{server_url}/api/session/{sid}/prompt", timeout=10)
+        assert pr.status_code in (200, 404), pr.text
+        if pr.status_code == 200:
+            body = pr.json()
+            assert "prompt" in body or "status" in body
+    finally:
+        http_session.delete(f"{server_url}/api/session/{sid}", timeout=30)
+
+
+def test_prompt_post_unknown_session_returns_404(http_session, server_url: str) -> None:
+    r = http_session.post(
+        f"{server_url}/api/session/bogus-session-id/prompt",
+        json={"response": "irrelevant"},
+        timeout=10,
+    )
+    assert r.status_code == 404
+
+
+def test_prompt_get_unknown_session_returns_404(http_session, server_url: str) -> None:
+    r = http_session.get(f"{server_url}/api/session/bogus-session-id/prompt", timeout=10)
+    assert r.status_code == 404