Pathfinding and re-pickup of the project

notes/roadmap.md

@@ -31,6 +31,16 @@ terminal). The platform layer — window, GPU, input, RGB332 palette — lives i
 - [x] Map loader: Tiled-CSV parser in `server/src/map.rs` (flip-flag masking, content-derived
       dimensions), `load_world` slices it into chunks, invisible solid border at the map rim.
       Replaces the hardcoded `build_world`. See `notes/07-map-loader.md`
+- [x] Client movement prediction: queued unconfirmed steps (`path` in `client/src/game.rs`),
+      paced at the server's 6 Hz movement cadence, reconciled against `EntityPacket` positions,
+      dropped after idle timeout. Shared collision vocabulary `shared::tile_collidable`
+      (currently empty — every tile walkable) keeps client prediction and server sim in lockstep.
+- [x] Click-to-move: framebuffer click → world tile, A* over the chunk cache
+      (`client/src/game/pathfind.rs`, unknown chunks count as blocked), route translated into
+      cardinal actions one step per movement interval — the server only ever sees N/E/S/W and
+      stays authoritative. Keyboard input cancels the route; each step is re-validated at send
+      time and a blocked step voids the route. In-flight steps render bright blue, planned
+      route dim blue.
 
 ---
 
@@ -105,6 +115,9 @@ Sprite rendering already landed (see Achieved). What remains is the camera:
 
 ### Later — Robustness + auth
 
+- Reactive pathfinding: replan from the confirmed position toward the original goal when a
+  route step is blocked or the server diverges from the prediction (currently the route is
+  simply voided)
 - Auth token handshake: replace source-address identity (`auth_token` field exists but is unused)
 - Multi-datagram `EntityPacket`: server currently truncates at 66 entities (`net.rs` TODO)
 - Asset embedding: `include_bytes!` for single-binary distribution