feat(client): throwaway narrate harness scene + live-smoke doc

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

client/scripts/harness/narrate_harness.gd

@@ -0,0 +1,66 @@
+extends Control
+## Throwaway M2 harness — the first on-screen generated prose. Wires the real
+## transport to a button and a label. NOT the game UI (a later wireframe owns
+## that). Run this scene directly (F6) with the proxy + Ollama up; see the live
+## smoke steps in client/docs/README.md.
+
+const DmService = preload("res://scripts/net/dm_service.gd")
+const HttpTransport = preload("res://scripts/net/http_transport.gd")
+const FallbackLibrary = preload("res://scripts/net/fallback_library.gd")
+
+var _service: DmService
+var _log: CanonLog
+var _label: RichTextLabel
+var _status: Label
+var _button: Button
+
+
+func _ready() -> void:
+	var http := HTTPRequest.new()
+	add_child(http)
+	_service = DmService.new(HttpTransport.new(http), FallbackLibrary.new())
+	_log = _build_scene_log()
+
+	var vbox := VBoxContainer.new()
+	vbox.set_anchors_preset(Control.PRESET_FULL_RECT)
+	vbox.add_theme_constant_override("separation", 12)
+	add_child(vbox)
+
+	_button = Button.new()
+	_button.text = "Narrate this scene"
+	_button.pressed.connect(_on_narrate_pressed)
+	vbox.add_child(_button)
+
+	_label = RichTextLabel.new()
+	_label.fit_content = true
+	_label.custom_minimum_size = Vector2(640, 320)
+	vbox.add_child(_label)
+
+	_status = Label.new()
+	vbox.add_child(_status)
+
+
+func _on_narrate_pressed() -> void:
+	_button.disabled = true
+	_status.text = "…narrating…"
+	var r := await _service.narrate(_log)
+	_label.text = r.display_text
+	for f in r.facts:
+		_log.add_fact(f)
+	_status.text = "facts harvested: %d%s" % [r.facts.size(), "   (degraded)" if r.degraded else ""]
+	_button.disabled = false
+
+
+func _build_scene_log() -> CanonLog:
+	var log := CanonLog.new()
+	log.player = LogPlayer.new("Aldric", "sellsword", "Fortune spits on you")
+	log.set_location("greywater_docks", "the Greywater docks")
+	log.party.append(PartyMember.new("brannoc_thane", "Brannoc Thane", 40))
+	log.party.append(PartyMember.new("cadwyn_vell", "Cadwyn Vell", 15))
+	log.push_event("Arrived at Greywater by barge before dawn")
+	log.push_event("Brannoc recognised the harbourmaster and went quiet")
+	log.add_fact("the eastern bridge out of Greywater is washed out")
+	log.add_fact("the harbourmaster is named Oda Fenn")
+	log.active_quests.append(Quest.new("find_the_ledger", "The Missing Ledger", "active", "Find who took Fenn's ledger"))
+	log.add_humiliation("h_0001", "vomited on a shrine step in front of a priest", 7, 3)
+	return log