feat(client): net primitives — DmResponse, NarrateResult, DmTransport, ProxyConfig

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

client/tests/unit/test_net_primitives.gd

@@ -0,0 +1,54 @@
+extends "res://addons/gut/test.gd"
+
+const DmResponse = preload("res://scripts/net/dm_response.gd")
+const NarrateResult = preload("res://scripts/net/narrate_result.gd")
+const DmTransport = preload("res://scripts/net/dm_transport.gd")
+const ProxyConfig = preload("res://scripts/net/proxy_config.gd")
+
+
+func test_dm_response_ok():
+	var r = DmResponse.ok(200, {"prose": "hi"})
+	assert_eq(r.status, 200)
+	assert_true(r.transport_ok)
+	assert_eq(r.body, {"prose": "hi"})
+	assert_eq(r.error, "")
+
+
+func test_dm_response_failed():
+	var r = DmResponse.failed("boom")
+	assert_false(r.transport_ok)
+	assert_eq(r.status, 0)
+	assert_eq(r.body, null)
+	assert_eq(r.error, "boom")
+
+
+func test_narrate_result_basic():
+	var r = NarrateResult.new("text", ["a"], false)
+	assert_eq(r.display_text, "text")
+	assert_eq(r.facts, ["a"])
+	assert_false(r.degraded)
+
+
+func test_narrate_result_fallback():
+	var r = NarrateResult.fallback("cold chamber")
+	assert_eq(r.display_text, "cold chamber")
+	assert_eq(r.facts, [])
+	assert_true(r.degraded)
+
+
+func test_transport_base_returns_not_implemented():
+	var t = DmTransport.new()
+	var r = await t.post_json("/x", {})
+	assert_false(r.transport_ok)
+	assert_eq(r.error, "transport not implemented")
+
+
+func test_proxy_config_default():
+	ProjectSettings.set_setting(ProxyConfig.SETTING, null)
+	assert_eq(ProxyConfig.base_url(), ProxyConfig.DEFAULT)
+
+
+func test_proxy_config_override():
+	ProjectSettings.set_setting(ProxyConfig.SETTING, "http://example.test:9000")
+	assert_eq(ProxyConfig.base_url(), "http://example.test:9000")
+	ProjectSettings.set_setting(ProxyConfig.SETTING, null)