fix(client): align tests and data with server v4 protocol changes

Server team shipped strict PROTOCOL_VERSION enforcement (c05ff7b),
1-indexed verb priorities, and "Observe" label for ExamineNpc.
Updates all test snapshots to include version: 4, fixes sim_bridge
test mode priorities (0-indexed → 1-indexed) and labels, replaces
v1 backward-compat tests with strict version rejection tests.

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

client/scripts/autoloads/game_state.gd

@@ -11,7 +11,7 @@ var visible_tiles: Array = []
 var visible_positions: Dictionary = {}  # Vector2i -> true, for fast fog lookups
 
 # v2 fields (D-015, D-031)
-var game_time: Dictionary = {}  # {day, time_of_day, day_phase, paused} or empty
+var game_time: Dictionary = {}  # {day, time_of_day, day_phase, tick_rate} or empty
 var player_facing: String = "North"  # 8-directional facing direction
 var visibility_sectors: Dictionary = {}  # Vector2i -> "Forward"/"Peripheral"
 

client/scripts/autoloads/sim_bridge.gd

@@ -302,8 +302,8 @@ func _test_snapshot() -> Dictionary:
 			"entity_type": "Npc",
 			"distance": npc_dist,
 			"verbs": [
-				{"kind": "Talk", "label": "Talk", "priority": 0, "available": true},
-				{"kind": "ExamineNpc", "label": "Examine", "priority": 1, "available": true},
+				{"kind": "Talk", "label": "Talk", "priority": 1, "available": true},
+				{"kind": "ExamineNpc", "label": "Observe", "priority": 2, "available": true},
 			],
 		})