feat(client): sprint 38 — free camera viewer, archetype strip, test fixes

- Add free camera mode (F4 toggle): WASD pan, scroll zoom, decoupled
  from player position (#898)
- Strip archetype-driven code: remove character_archetype, lattice_profile,
  and lattice color palettes from client (#882)
- Fix confrontation_monologue signal not firing in headless test mode (#867)
- Revive fog state behavioral tests: EXP_EXPLORED persistence, grow-only
  bounds, texture-resize copy, BoundaryWall handling (#879)
- Triage pre-existing test failures: fix examine_display dismiss timing,
  fog test position fragility, rendering snapshot assertions,
  time_display format (#871)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

client/scripts/autoloads/session_manager.gd

@@ -55,12 +55,11 @@ func new_game() -> String:
 
 
 ## Resume an existing game session by setting the active game-id.
-## Restores world_seed and character_archetype from the save directory.
+## Restores world_seed from the save directory.
 func resume_game(game_id: String) -> void:
 	GameState.current_game_id = game_id
 	var save_path := SAVES_DIR + game_id + "/"
 	GameState.world_seed = _read_seed_file(save_path)
-	GameState.character_archetype = _read_archetype_file(save_path)
 
 
 ## List all game directories under user://saves/ sorted by last-modified (most recent first).
@@ -171,29 +170,6 @@ func _read_seed_file(save_path: String) -> int:
 	return file.get_64() & 0x7FFFFFFFFFFFFFFF
 
 
-## Write character_archetype to save directory. Called after new_game() creates the dir.
-func save_character_archetype(game_id: String, archetype: String) -> void:
-	var save_path := SAVES_DIR + game_id + "/"
-	var file := FileAccess.open(save_path + "character.txt", FileAccess.WRITE)
-	if file == null:
-		push_error(
-			(
-				"SessionManager: failed to write character.txt: %s"
-				% error_string(FileAccess.get_open_error())
-			)
-		)
-		return
-	file.store_string(archetype)
-
-
-## Read character_archetype from save directory. Returns "detective" if missing (legacy saves).
-func _read_archetype_file(save_path: String) -> String:
-	var file := FileAccess.open(save_path + "character.txt", FileAccess.READ)
-	if file == null:
-		return "detective"
-	return file.get_as_text().strip_edges()
-
-
 func _find_newest_save(dir_path: String) -> String:
 	var dir := DirAccess.open(dir_path)
 	if dir == null: