Fix/multiple company (#203)

* Refactor onboarding and dashboard logic; add silent team creation for users

- Removed unnecessary useCompany context in DashboardContent and SettingsSidebar components.
- Simplified onboarding setup logic to allow direct access to the dashboard for users without companies.
- Introduced WelcomeOnboarding component to handle user onboarding steps.
- Added migration to create silent teams for all users at signup, backfilling existing users without teams, and cleaning up incomplete companies.

* fix: update greeting logic and improve email handling in TIC extension

* Redirect to onboarding for users without companies and update onboarding flow

* Build issue fix

* Enhance onboarding experience by adding existing companies check

app/api/extensions/enable-banking/callback/route.ts

@@ -170,9 +170,7 @@ export async function GET(request: Request) {
       .eq('company_id', companyId)
       .single()
 
-    const redirectTarget = userSettings?.onboarding_complete
-      ? `/settings/banking?bank_connected=true&connection_id=${connectionId}`
-      : `/onboarding?bank_connected=true&connection_id=${connectionId}`
+    const redirectTarget = `/settings/banking?bank_connected=true&connection_id=${connectionId}`
 
     return NextResponse.redirect(`${baseUrl}${redirectTarget}`)
   } catch (error) {