fix: clear recovered travel errors

.superpowers/sdd/2026-08-18-first-visible-vertical-slice/task-7-report.md

@@ -59,6 +59,34 @@ git diff --check -- <Task-7 files>
 # exit 0
 ```
 
+## Review fix round 2
+
+The transient-poll regression now asserts both phases: the failed poll exposes
+`Temporary failure`, and the successful authoritative `IDLE` retry clears it.
+The new assertion was RED against the prior implementation because the error
+remained set after the retry. `refreshCurrentTravel()` now clears the polling
+error only after a successful API response and before applying that response;
+the countdown contract and all other error paths are unchanged.
+
+Fresh verification:
+
+```powershell
+npm test --workspace=@ashen-realms/web -- --watch=false --include='src/app/features/world/world.store.spec.ts'
+# 1 test file passed, 9 tests passed
+
+npm test --workspace=@ashen-realms/web -- --watch=false
+# 3 test files passed, 13 tests passed
+
+npm run build:web
+# Angular production build completed successfully
+
+npm exec --workspace=@ashen-realms/web -- prettier --check <Task-7 files>
+# All matched files use Prettier code style
+
+git diff --check -- <Task-7 files>
+# exit 0
+```
+
 The web workspace declares neither a `lint` script nor an ESLint dependency, so
 there is no repository-configured lint command to run for this task.
 

apps/web/src/app/features/world/world.store.spec.ts

@@ -166,11 +166,13 @@ describe('WorldStore', () => {
     await vi.advanceTimersByTimeAsync(999);
 
     expect(api.getCurrentTravel).toHaveBeenCalledTimes(2);
+    expect(store.error()).toBe('Temporary failure');
 
     await vi.advanceTimersByTimeAsync(1);
 
     expect(api.getCurrentTravel).toHaveBeenCalledTimes(3);
     expect(store.currentTravel()).toEqual({ status: 'IDLE' });
+    expect(store.error()).toBeNull();
   });
 
   it('ignores a late poll response after the store is destroyed', async () => {

apps/web/src/app/features/world/world.store.ts

@@ -173,6 +173,7 @@ export class WorldStore implements OnDestroy {
         return;
       }
 
+      this.errorState.set(null);
       await this.setCurrentTravel(travel);
       if (travel.status === 'TRAVELLING') {
         this.scheduleTravelRetry();