docs: mark quicksave phase complete

docs/PROJECT_CONTEXT.md

@@ -502,8 +502,9 @@ These are expected prototype constraints, not necessarily isolated bugs:
   marker mapping and several action effects remain hard-coded.
 - Temporary activity markers remain for eating, rest, study, and patrol; NPC
   and player food/wood gathering use `ResourceNode` instances with no fallback.
-- Current NPC, village, resource, clock, and RNG state serialize through schema
-  v1, but there is no save-slot/file UX or top-level backward migration yet.
+- Current NPC, village, resource, storage, event, clock, and RNG state serialize
+  through world schema v3. F5/F9 provide one validated local quicksave; a save
+  menu, metadata, and player-transform persistence remain deferred.
 - Simulation-owned resource records retain live amounts, reservations, and
   usage definitions while ResourceNode scenes are unloaded.
 - An explicit fixed-step clock converts frame delta into simulation ticks, but
@@ -741,8 +742,9 @@ The location-based food loop is complete and traceable: gathering creates
 carried food, depositing fills the pantry, withdrawal retrieves one unit, and
 eating consumes it. Each successful transfer creates a persisted structured
 event, and active NPCs visibly carry food through presentation derived from
-their inventory. The next systems milestone is save-slot persistence and
-validation. Bounded Terrain3D look-development can resume alongside it.
+their inventory. The bounded save-slot slice is also complete, including
+validation, atomic replacement recovery, and active-visual rebuilding.
+Terrain3D runtime integration and the simulation-garden beauty pass are next.
 
 The coherent visual slice can then aim for: