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/input_mapper.gd

@@ -68,7 +68,7 @@ func _process(_delta: float) -> void:
 	# D-054: Update facing angle from mouse position every frame
 	_update_facing_from_mouse()
 
-	if GameState.dialogue_active:
+	if GameState.dialogue_active or GameState.free_camera_mode:
 		return
 
 	# D-054: Send facing octant to server when it changes (even without movement)