feat: configurable sync interval, auto-match, encryption note, admin link, SimpleFIN hyperlink
#1 Sync interval in admin UI:
- bankSyncConfigService: reads simplefin_sync_interval_hours from settings
(DB-first, env fallback, default 4h), setSyncIntervalHours() with validation
- bankSyncWorker: live-updates interval from getBankSyncConfig() each tick
- routes/admin: PUT accepts enabled and sync_interval_hours independently
- BankSyncAdminCard: number input (0.5 step, 0.5-168 range), dirty-checks both
#3 Auto-match after background sync:
- matchSuggestionService: autoMatchForUser() auto-applies suggestions ≥80
score (exact amount + date ±1d + name signal), lazy-requires matchTransactionToBill
- bankSyncWorker: calls autoMatchForUser after each successful sync, own try/catch
#4 Encryption note in BankSyncAdminCard below worker status panel
Also: error handling, admin link in tracker sidebar, SimpleFIN bridge hyperlink
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