fix(ui): address PR #90 review — 8 items (W1–W4, S5–S6, A3–A4)

W1/A2: add SimBridge.CONNECTED guard before send_input in toggle handler
W2/A1: assert PlatformInfo != null in HardwareDetector._ready();
       add ordering comment in project.godot [autoload] section
W3: replace FileAccess.open() with get_file_as_string() in
    read_benchmark_cache() — auto-closes, no leak
W4/A3: add _extract_bool_setting() helper in game_state.gd that handles
       both {"Bool": true} and plain bool; push_warning on type mismatch
S5: sync _pre_battery_pref from GameState after load_ai_pref() in
    HardwareDetector._ready() — closes race if system starts on battery
S6: separate "red" TPT status into its own arm with STATUS_RED dot and
    label colour — three-colour mapping: green/yellow/red now distinct
A4: replace DebugConsole.PREFS_PATH compile-time dependency in
    _save_ai_pref() with local SETTINGS_CFG_PATH constant

S7 (battery CI guard) already applied by Hoshe in test file.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

client/scripts/autoloads/game_state.gd

@@ -352,8 +352,8 @@ func apply_snapshot(snapshot: Dictionary) -> void:
 						continue
 					if entry.get("key") == "ai_dialogue.enabled":
 						var val: Variant = entry.get("value")
-						if val is Dictionary and val.has("Bool"):
-							ai_enhanced_dialogue_enabled = bool(val["Bool"])
+						if val != null:
+							ai_enhanced_dialogue_enabled = _extract_bool_setting("ai_dialogue.enabled", val)
 	else:
 		settings_response = null
 
@@ -403,3 +403,16 @@ func apply_snapshot(snapshot: Dictionary) -> void:
 				boundary_positions[pos] = true
 			elif not has_explicit_positions:
 				visible_positions[pos] = true
+
+
+# -- Helpers ------------------------------------------------------------------
+
+## Extract a bool from a tagged-union {"Bool": true} or plain bool value.
+## Handles both serde encoding styles; emits push_warning on unrecognised format.
+static func _extract_bool_setting(key: String, val: Variant) -> bool:
+	if val is bool:
+		return val
+	if val is Dictionary and val.has("Bool"):
+		return bool(val["Bool"])
+	push_warning("GameState: unexpected type for setting '%s': %s" % [key, str(val)])
+	return false