feat: add in-game sound effects and browser notifications (#27)

Adds Web Audio API sound effects and browser notifications for key game
events: achievement unlocked, quest completed, quest failed, boss
defeated, prestige, transcendence, and apotheosis. Both features are
toggled via profile settings, with notification permission requested
on first enable.

apps/api/src/routes/profile.ts

@@ -44,6 +44,8 @@ const parseProfileSettings = (raw: unknown): ProfileSettings => {
     ? (parsedNumberFormat as ProfileSettings["numberFormat"])
     : "suffix";
   return {
+    enableNotifications: rawObject.enableNotifications === true,
+    enableSounds: rawObject.enableSounds === true,
     numberFormat: numberFormat,
     showAchievementsUnlocked: rawObject.showAchievementsUnlocked !== false,
     showAdventurersRecruited: rawObject.showAdventurersRecruited !== false,
@@ -203,6 +205,8 @@ profileRouter.put("/", authMiddleware, async(context) => {
     ? (parsedNumberFormat as ProfileSettings["numberFormat"])
     : "suffix";
   const profileSettings: ProfileSettings = {
+    enableNotifications: body.profileSettings.enableNotifications ?? false,
+    enableSounds: body.profileSettings.enableSounds ?? false,
     numberFormat: numberFormat,
     showAchievementsUnlocked: body.profileSettings.showAchievementsUnlocked ?? true,
     showAdventurersRecruited: body.profileSettings.showAdventurersRecruited ?? true,