fix: turn off auto-boss/auto-quest on failure and surface status

Auto-boss now disables itself when a boss fight is lost (instead of
silently looping), and turns off with an error message when the API
call itself fails (e.g. party has no adventurers). Auto-quest disables
itself whenever a quest fails the random chance check. In both cases
the player sees a clear status/error line in the boss panel rather than
a silent toggle, and can re-enable when ready.

Also initialises autoBoss/autoQuest to false in initialGameState so
these fields survive save/load cycles from the very first session.

Closes #40

apps/api/src/data/initialState.ts

@@ -76,6 +76,8 @@ const initialGameState = (
     achievements:   structuredClone(defaultAchievements),
     adventurers:    structuredClone(defaultAdventurers),
     apotheosis:     { ...initialApotheosis },
+    autoBoss:       false,
+    autoQuest:      false,
     baseClickPower: 1,
     bosses:         structuredClone(defaultBosses),
     companions:     { activeCompanionId: null, unlockedCompanionIds: [] },