feat(onboarding): branch question on the journey done screen (#1468)

* feat(onboarding): branch question on the journey done screen

Second slice of the approved activation concept: the moment the company
exists, the done screen asks "Var fanns bokföringen innan?" with
provider chips (real logos), SIE file, and new-business options, plus a
quiet look-around escape. Choices persist initial_setup_path
(fire-and-forget) and deep-link into the existing flows: providers jump
straight to the migration wizard's connect step (sieViaApi providers
only; Visma/Bokio land on the provider list where the SIE-first gate
lives), the SIE chip opens the upload step, new business lands on Hem
with step one checked off.

mode='add' keeps the plain "Öppna Accounted" button: the concept's own
guard, and it avoids writing the path onto the previous company if
setActiveCompany silently failed. Routing lives in a pure helper with
tests; anonymous onboarding_branch_chosen funnel event follows the
guarded capture pattern.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* fix(onboarding): review triage: single-choice latch, preselect reset

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* fix: restore package-lock.json to main (worktree npm install mutated it)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

---------

Co-authored-by: Jakob Wennberg <311770904+jakobwennberg-oss@users.noreply.github.com>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

components/extensions/general/ArcimMigrationWorkspace.tsx

@@ -1,6 +1,6 @@
 'use client'
 
-import { useState, useCallback, useEffect } from 'react'
+import { useState, useCallback, useEffect, useRef } from 'react'
 import { Card, CardContent, CardHeader, CardTitle, CardDescription } from '@/components/ui/card'
 import { Badge } from '@/components/ui/badge'
 import { Progress } from '@/components/ui/progress'
@@ -1799,7 +1799,13 @@ function EntityResultRow({
 
 // ── Main wizard ─────────────────────────────────────────────────
 
-export default function ArcimMigrationWorkspace(_props: WorkspaceComponentProps) {
+export default function ArcimMigrationWorkspace({
+  initialProvider,
+}: WorkspaceComponentProps & {
+  /** Deep-linked old system (onboarding branch question): jump straight to
+   *  its connect step instead of showing the provider list. */
+  initialProvider?: string
+}) {
   const { toast } = useToast()
 
   const [step, setStep] = useState<WizardStep>('provider')
@@ -2129,6 +2135,22 @@ export default function ArcimMigrationWorkspace(_props: WorkspaceComponentProps)
   // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [])
 
+  // Deep-linked provider preselect (onboarding branch question). Only when
+  // this mount is not an OAuth return (that flow owns the wizard state), and
+  // only for providers whose SIE comes via API: visma/bokio must first see
+  // the provider list with its "SIE krävs först" gate, which depends on
+  // async connection status.
+  const preselectedRef = useRef(false)
+  useEffect(() => {
+    if (preselectedRef.current || !initialProvider) return
+    if (new URL(window.location.href).searchParams.get('migration')) return
+    const provider = ARCIM_PROVIDERS.find((p) => p.id === initialProvider)
+    if (!provider || COMING_SOON_PROVIDERS.has(provider.id) || !provider.sieViaApi) return
+    preselectedRef.current = true
+    void handleSelectProvider(provider.id)
+  // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [initialProvider])
+
   // Listen for postMessage from OAuth popup
   useEffect(() => {
     function handleMessage(event: MessageEvent) {