refactor(pathfinding): remove unused PathStatus.PENDING

Drop PENDING from PathStatus/PathResult and remove dead PENDING branches from
TradeShipExecution, TransportShipExecution, and WarshipExecution.

src/core/execution/TradeShipExecution.ts

@@ -110,26 +110,6 @@ export class TradeShipExecution implements Execution {
     const result = this.pathFinder.next(curTile, dst);
 
     switch (result.status) {
-      case PathStatus.PENDING:
-        if (dst !== this.motionPlanDst) {
-          this.motionPlanId++;
-          const from = curTile;
-          const path = this.pathFinder.findPath(from, dst) ?? [from];
-          if (path.length === 0 || path[0] !== from) {
-            path.unshift(from);
-          }
-
-          this.mg.recordMotionPlan({
-            kind: "grid",
-            unitId: this.tradeShip.id(),
-            planId: this.motionPlanId,
-            startTick: ticks + 1,
-            ticksPerStep: 1,
-            path,
-          });
-          this.motionPlanDst = dst;
-        }
-        break;
       case PathStatus.NEXT:
         if (dst !== this.motionPlanDst) {
           this.motionPlanId++;

src/core/execution/TransportShipExecution.ts

@@ -248,8 +248,6 @@ export class TransportShipExecution implements Execution {
       case PathStatus.NEXT:
         this.boat.move(result.node);
         break;
-      case PathStatus.PENDING:
-        break;
       case PathStatus.NOT_FOUND: {
         // TODO: add to poisoned port list
         const map = this.mg.map();

src/core/execution/WarshipExecution.ts

@@ -190,9 +190,6 @@ export class WarshipExecution implements Execution {
         case PathStatus.NEXT:
           this.warship.move(result.node);
           break;
-        case PathStatus.PENDING:
-          this.warship.touch();
-          break;
         case PathStatus.NOT_FOUND: {
           console.log(`path not found to target`);
           break;
@@ -221,9 +218,6 @@ export class WarshipExecution implements Execution {
       case PathStatus.NEXT:
         this.warship.move(result.node);
         break;
-      case PathStatus.PENDING:
-        this.warship.touch();
-        return;
       case PathStatus.NOT_FOUND: {
         console.log(`path not found to target`);
         break;

src/core/pathfinding/types.ts

@@ -4,14 +4,12 @@
  */
 
 export enum PathStatus {
-  NEXT,
-  PENDING,
-  COMPLETE,
-  NOT_FOUND,
+  NEXT = 0,
+  COMPLETE = 2,
+  NOT_FOUND = 3,
 }
 
 export type PathResult<T> =
-  | { status: PathStatus.PENDING }
   | { status: PathStatus.NEXT; node: T }
   | { status: PathStatus.COMPLETE; node: T }
   | { status: PathStatus.NOT_FOUND };