Supp/invoice bfl errors (#390)

* feat(accounting): update accounting method validation and messaging for aktiebolag and enskild firma

* Remove AI subsystem and related code

- Deleted AI proposals and requests persistence logic from `lib/ai/proposals/persist.ts`.
- Removed re-validation logic for proposals in `lib/ai/proposals/re-validate.ts`.
- Cleaned up schemas related to AI flows in `lib/api/schemas.ts`.
- Removed AI-related fields from bookkeeping engine in `lib/bookkeeping/engine.ts`.
- Eliminated AI event types from `lib/events/types.ts`.
- Updated tests to reflect the removal of AI-related functionality in `lib/extensions/__tests__/sectors.test.ts`.
- Adjusted initialization logic in `lib/init.ts` to exclude AI proposal handler registration.
- Cleaned up transaction ingestion logic in `lib/transactions/ingest.ts` to remove AI flow checks.
- Updated helper functions in `tests/helpers.ts` to remove AI-related settings.
- Removed AI-related types and interfaces from `types/index.ts`.
- Added migration script to drop AI-related tables and settings from the database.

* fix(migrations): ensure foreign key constraint is dropped before removing AI tables

* feat(invoice-inbox): implement deterministic invoice field extraction and inbox provisioning

- Added `extract-invoice-fields.ts` for extracting fields from PDF invoices using regex and pdfjs-dist, replacing the previous AI classifier.
- Introduced `inbox-provisioning.ts` to manage company inbox addresses and rotation of inboxes using Supabase RPCs.
- Created `resend-inbound.ts` for handling inbound email events and attachments via the Resend API.
- Defined the extension manifest for the invoice inbox, specifying required environment variables and descriptions.
- Migrated database schema to remove AI-related columns and tighten the status enum in `invoice_inbox_items`.

* feat(invoice-inbox): remove AI-specific columns and tighten status enum

* fix(skattekonto): remove manual entry creation reference from transaction input

* fix(schemas): remove accounting method validation for aktiebolag in UpdateSettingsSchema

extensions/general/enable-banking/components/BankingSettingsPanel.tsx

@@ -30,14 +30,27 @@ export default function BankingSettingsPanel() {
   const [isConnecting, setIsConnecting] = useState(false)
   const [connectingBankName, setConnectingBankName] = useState<string | null>(null)
   const connectingRef = useRef(false)
+  const releaseTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null)
   const [isLoading, setIsLoading] = useState(true)
   const [showCsvFallback, setShowCsvFallback] = useState(false)
   const [psuType, setPsuType] = useState<'personal' | 'business'>('business')
 
+  // Must match STALE_THRESHOLD_MS in extensions/general/enable-banking/index.ts
+  const PENDING_LOCK_MS = 30 * 1000
+
   useEffect(() => {
     fetchConnections()
+    return () => {
+      if (releaseTimerRef.current) clearTimeout(releaseTimerRef.current)
+    }
   }, [])
 
+  function releaseConnectingLock() {
+    connectingRef.current = false
+    setIsConnecting(false)
+    setConnectingBankName(null)
+  }
+
   async function fetchConnections() {
     setIsLoading(true)
     const { data: { user } } = await supabase.auth.getUser()
@@ -51,6 +64,22 @@ export default function BankingSettingsPanel() {
       .order('created_at', { ascending: false })
 
     setBankConnections(connections || [])
+
+    // If a pending connection exists from a recent attempt (e.g. user bounced back from
+    // the bank's auth page), keep the connect button disabled until the server-side lock expires.
+    const freshPending = (connections || []).find((c) => c.status === 'pending')
+    if (freshPending) {
+      const age = Date.now() - new Date(freshPending.created_at).getTime()
+      const remaining = PENDING_LOCK_MS - age
+      if (remaining > 0) {
+        connectingRef.current = true
+        setIsConnecting(true)
+        setConnectingBankName(freshPending.bank_name)
+        if (releaseTimerRef.current) clearTimeout(releaseTimerRef.current)
+        releaseTimerRef.current = setTimeout(releaseConnectingLock, remaining)
+      }
+    }
+
     setIsLoading(false)
   }