feat(client): ConsideringPhrases — authored rotating think-lines (§13)

client/scripts/ui/considering_phrases.gd

@@ -0,0 +1,41 @@
+class_name ConsideringPhrases
+extends RefCounted
+## Authored "the GM is thinking" lines (charter §13 — even loading is content).
+## Pure: cycles a phrase pool in order on a running index that is instance state
+## (spec decision 4 — the indicator reuses one instance so the first phrase varies
+## turn to turn without randomness). A missing/malformed file degrades to one
+## hardcoded constant, so the indicator itself cannot fail.
+
+const PATH := "res://content/considering.json"
+const LAST_RESORT := "The Master considers your words."
+
+var _pool: Array = []
+var _index: int = 0
+
+
+func _init(path := PATH) -> void:
+	_pool = _load(path)
+
+
+func next() -> String:
+	if _pool.is_empty():
+		return LAST_RESORT
+	var phrase := str(_pool[_index % _pool.size()])
+	_index += 1
+	return phrase
+
+
+static func _load(path: String) -> Array:
+	if not FileAccess.file_exists(path):
+		return []
+	var text := FileAccess.get_file_as_string(path)
+	# Instance parse() (not JSON.parse_string) so malformed input returns an
+	# Error code instead of the engine error the test config promotes to a fail.
+	var json := JSON.new()
+	if json.parse(text) != OK:
+		return []
+	var data = json.get_data()
+	if typeof(data) != TYPE_DICTIONARY:
+		return []
+	var lines = data.get("considering", [])
+	return lines if typeof(lines) == TYPE_ARRAY else []