feat(scheduler): persist recurring daily starts

Add a local-calendar daily start scheduler with pending receipts, per-day deduplication, DST-safe target calculation, missed-day recovery, and retryable account/start failure outcomes.

Persist and validate the daily rule, expose its next target to the renderer, preserve legacy one-time schedules until a daily rule is saved, and gate boot auto-resume on recorded active-run evidence.

Wire boot, settings, account, suspend, resume, interval, and shutdown lifecycle handling with focused RED/GREEN coverage for calendar, persistence, renderer, and controller boundaries.

src/renderer/App.tsx

@@ -808,9 +808,16 @@ const emptySnapshot = (): UiSnapshot => ({
     megaDebridAccountDailyLimitBytes: {},
     megaDebridAccountDailyUsageBytes: {},
     megaDebridAccountTotalUsageBytes: {},
-    debridAccountStatuses: {},
-    providerDailyUsageDay: getProviderUsageDayKey(),
-    scheduledStartEpochMs: 0
+    debridAccountStatuses: {},
+    providerDailyUsageDay: getProviderUsageDayKey(),
+    dailyStartEnabled: false,
+    dailyStartMinuteOfDay: 0,
+    dailyStartFirstLocalDate: "",
+    dailyStartLastHandledLocalDate: "",
+    dailyStartPendingLocalDate: "",
+    dailyStartLastOutcome: "",
+    scheduledStartEpochMs: 0,
+    nextDailyStartEpochMs: 0
   },
   accounts: [],
   session: {