chore: more feedback fixes (#129)

## Summary

- Fix `NaN` displayed in Sync New Content / Force Unlock notifications by guarding against undefined counts
- Poll server for exploration claimability before showing Collect button to prevent client/server desync
- Return authoritative materials list from craft API to prevent client desync causing false affordability
- Add test coverage for `sync-new-content` and `explore/claimable` endpoints

Closes #125
Closes #127
Closes #128

## Test plan

- [ ] Trigger a sync with new content and verify the notification shows a real count instead of `NaN`
- [ ] Start an exploration, wait for it to complete, and verify the Collect button only appears after the server confirms claimable
- [ ] Attempt to craft a recipe and verify the material counts in the UI update to match the server's authoritative values

✨ This issue was created with help from Hikari~ 🌸

Reviewed-on: #129
Co-authored-by: Hikari <hikari@nhcarrigan.com>
Co-committed-by: Hikari <hikari@nhcarrigan.com>

apps/web/src/components/game/debugPanel.tsx

@@ -13,18 +13,22 @@ import { ConfirmationModal } from "../ui/confirmationModal.js";
 type ActiveModal = "force-unlocks" | "hard-reset" | "sync-new-content" | null;
 
 interface SyncNewContentResult {
-  achievementsAdded:     number;
-  adventurersAdded:      number;
-  bossesAdded:           number;
-  bossRewardsPatched:    number;
-  equipmentAdded:        number;
-  explorationAreasAdded: number;
-  questRewardsPatched:   number;
-  questsAdded:           number;
-  upgradesAdded:         number;
-  zonesAdded:            number;
+  achievementsAdded:     number | undefined;
+  adventurersAdded:      number | undefined;
+  bossesAdded:           number | undefined;
+  bossRewardsPatched:    number | undefined;
+  equipmentAdded:        number | undefined;
+  explorationAreasAdded: number | undefined;
+  questRewardsPatched:   number | undefined;
+  questsAdded:           number | undefined;
+  upgradesAdded:         number | undefined;
+  zonesAdded:            number | undefined;
 }
 
+const safeNumber = (value: number | undefined): number => {
+  return value ?? 0;
+};
+
 /**
  * Builds a human-readable summary of what the sync-new-content operation added.
  * @param result - The counts returned by the operation.
@@ -32,16 +36,16 @@ interface SyncNewContentResult {
  */
 const buildSyncNewContentMessage = (result: SyncNewContentResult): string => {
   const entries: Array<[ number, string ]> = [
-    [ result.zonesAdded, "zone(s)" ],
-    [ result.questsAdded, "quest(s)" ],
-    [ result.questRewardsPatched, "quest reward(s) patched" ],
-    [ result.bossesAdded, "boss(es)" ],
-    [ result.bossRewardsPatched, "boss reward(s) patched" ],
-    [ result.explorationAreasAdded, "exploration area(s)" ],
-    [ result.adventurersAdded, "adventurer tier(s)" ],
-    [ result.upgradesAdded, "upgrade(s)" ],
-    [ result.equipmentAdded, "equipment item(s)" ],
-    [ result.achievementsAdded, "achievement(s)" ],
+    [ safeNumber(result.zonesAdded), "zone(s)" ],
+    [ safeNumber(result.questsAdded), "quest(s)" ],
+    [ safeNumber(result.questRewardsPatched), "quest reward(s) patched" ],
+    [ safeNumber(result.bossesAdded), "boss(es)" ],
+    [ safeNumber(result.bossRewardsPatched), "boss reward(s) patched" ],
+    [ safeNumber(result.explorationAreasAdded), "exploration area(s)" ],
+    [ safeNumber(result.adventurersAdded), "adventurer tier(s)" ],
+    [ safeNumber(result.upgradesAdded), "upgrade(s)" ],
+    [ safeNumber(result.equipmentAdded), "equipment item(s)" ],
+    [ safeNumber(result.achievementsAdded), "achievement(s)" ],
   ];
   const parts = entries.
     filter(([ count ]) => {
@@ -60,14 +64,14 @@ const buildSyncNewContentMessage = (result: SyncNewContentResult): string => {
 };
 
 interface ForceUnlocksResult {
-  adventurersUnlocked: number;
-  bossesUnlocked:      number;
-  equipmentUnlocked:   number;
-  explorationUnlocked: number;
-  questsUnlocked:      number;
-  storyUnlocked:       number;
-  upgradesUnlocked:    number;
-  zonesUnlocked:       number;
+  adventurersUnlocked: number | undefined;
+  bossesUnlocked:      number | undefined;
+  equipmentUnlocked:   number | undefined;
+  explorationUnlocked: number | undefined;
+  questsUnlocked:      number | undefined;
+  storyUnlocked:       number | undefined;
+  upgradesUnlocked:    number | undefined;
+  zonesUnlocked:       number | undefined;
 }
 
 /**
@@ -77,14 +81,14 @@ interface ForceUnlocksResult {
  */
 const buildForceUnlocksMessage = (result: ForceUnlocksResult): string => {
   const entries: Array<[ number, string ]> = [
-    [ result.zonesUnlocked, "zone(s)" ],
-    [ result.questsUnlocked, "quest(s)" ],
-    [ result.bossesUnlocked, "boss(es)" ],
-    [ result.explorationUnlocked, "exploration area(s)" ],
-    [ result.adventurersUnlocked, "adventurer tier(s)" ],
-    [ result.upgradesUnlocked, "upgrade(s)" ],
-    [ result.equipmentUnlocked, "equipment item(s)" ],
-    [ result.storyUnlocked, "story chapter(s)" ],
+    [ safeNumber(result.zonesUnlocked), "zone(s)" ],
+    [ safeNumber(result.questsUnlocked), "quest(s)" ],
+    [ safeNumber(result.bossesUnlocked), "boss(es)" ],
+    [ safeNumber(result.explorationUnlocked), "exploration area(s)" ],
+    [ safeNumber(result.adventurersUnlocked), "adventurer tier(s)" ],
+    [ safeNumber(result.upgradesUnlocked), "upgrade(s)" ],
+    [ safeNumber(result.equipmentUnlocked), "equipment item(s)" ],
+    [ safeNumber(result.storyUnlocked), "story chapter(s)" ],
   ];
   const parts = entries.
     filter(([ count ]) => {