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

supabase/migrations/20260408130000_sie_files_storage_bucket.sql

@@ -16,7 +16,6 @@ VALUES (
   ARRAY['text/plain']
 )
 ON CONFLICT (id) DO NOTHING;
-ON CONFLICT (id) DO NOTHING;
 
 -- =============================================================================
 -- 2. INSERT policy: Users can upload to companies they belong to

supabase/migrations/20260408140000_silent_teams_for_all_users.sql

@@ -0,0 +1,151 @@
+-- Migration: Silent teams for all users
+--
+-- Every user now gets a silent team at signup. This migration:
+-- 1. Creates an ensure_user_team() RPC for idempotent team creation
+-- 2. Backfills: creates teams for existing users who don't have one
+-- 3. Assigns orphaned companies (team_id IS NULL) to their owner's team
+-- 4. Deletes incomplete companies (mid-onboarding, no journal entries)
+
+-- =============================================================================
+-- 1. NEW RPC: ensure_user_team()
+-- =============================================================================
+-- Idempotently ensures the calling user has a team.
+-- Returns the team_id (existing or newly created).
+
+CREATE OR REPLACE FUNCTION public.ensure_user_team()
+RETURNS uuid
+LANGUAGE plpgsql
+SECURITY DEFINER
+SET search_path = public
+AS $$
+DECLARE
+  v_user_id uuid;
+  v_team_id uuid;
+BEGIN
+  v_user_id := auth.uid();
+  IF v_user_id IS NULL THEN
+    RAISE EXCEPTION 'Not authenticated';
+  END IF;
+
+  -- Check if user already has a team
+  SELECT team_id INTO v_team_id
+  FROM public.team_members
+  WHERE user_id = v_user_id
+  LIMIT 1;
+
+  IF v_team_id IS NOT NULL THEN
+    RETURN v_team_id;
+  END IF;
+
+  -- Create a new team (name doesn't matter — hidden from UI)
+  INSERT INTO public.teams (name, created_by)
+  VALUES ('Personal', v_user_id)
+  RETURNING id INTO v_team_id;
+
+  -- Add user as team owner
+  INSERT INTO public.team_members (team_id, user_id, role)
+  VALUES (v_team_id, v_user_id, 'owner');
+
+  RETURN v_team_id;
+END;
+$$;
+
+GRANT EXECUTE ON FUNCTION public.ensure_user_team() TO authenticated;
+
+-- =============================================================================
+-- 2. BACKFILL: Create teams for existing users without one
+-- =============================================================================
+-- Find all users who have company_members rows but no team_members rows.
+-- Create a team for each and add them as owner.
+
+DO $$
+DECLARE
+  rec RECORD;
+  v_team_id uuid;
+BEGIN
+  FOR rec IN
+    SELECT DISTINCT cm.user_id
+    FROM public.company_members cm
+    WHERE NOT EXISTS (
+      SELECT 1 FROM public.team_members tm WHERE tm.user_id = cm.user_id
+    )
+  LOOP
+    -- Create team
+    INSERT INTO public.teams (name, created_by)
+    VALUES ('Personal', rec.user_id)
+    RETURNING id INTO v_team_id;
+
+    -- Add as owner
+    INSERT INTO public.team_members (team_id, user_id, role)
+    VALUES (v_team_id, rec.user_id, 'owner');
+
+    -- Assign all companies owned by this user to the new team
+    UPDATE public.companies
+    SET team_id = v_team_id
+    WHERE created_by = rec.user_id
+      AND team_id IS NULL;
+  END LOOP;
+END;
+$$;
+
+-- =============================================================================
+-- 3. Assign any remaining orphaned companies to their creator's team
+-- =============================================================================
+-- Edge case: companies where team_id IS NULL but the creator already has a team
+-- (e.g., they were a team member but also had solo companies).
+
+UPDATE public.companies c
+SET team_id = (
+  SELECT tm.team_id
+  FROM public.team_members tm
+  WHERE tm.user_id = c.created_by
+  LIMIT 1
+)
+WHERE c.team_id IS NULL
+  AND EXISTS (
+    SELECT 1 FROM public.team_members tm WHERE tm.user_id = c.created_by
+  );
+
+-- =============================================================================
+-- 4. Delete incomplete companies (mid-onboarding cleanup)
+-- =============================================================================
+-- Only delete companies where:
+-- - onboarding_complete is false or no settings row exists
+-- - There are zero journal entries
+-- - There are zero transactions
+-- This is safe because no real bookkeeping data exists.
+
+DO $$
+DECLARE
+  rec RECORD;
+  v_je_count int;
+  v_tx_count int;
+BEGIN
+  FOR rec IN
+    SELECT c.id AS company_id
+    FROM public.companies c
+    LEFT JOIN public.company_settings cs ON cs.company_id = c.id
+    WHERE (cs.onboarding_complete IS NULL OR cs.onboarding_complete = false)
+  LOOP
+    -- Check for journal entries
+    SELECT count(*) INTO v_je_count
+    FROM public.journal_entries
+    WHERE company_id = rec.company_id;
+
+    -- Check for transactions
+    SELECT count(*) INTO v_tx_count
+    FROM public.transactions
+    WHERE company_id = rec.company_id;
+
+    -- Only delete if truly empty
+    IF v_je_count = 0 AND v_tx_count = 0 THEN
+      -- Delete dependent rows first (order matters for FK constraints)
+      DELETE FROM public.company_settings WHERE company_id = rec.company_id;
+      DELETE FROM public.fiscal_periods WHERE company_id = rec.company_id;
+      DELETE FROM public.chart_of_accounts WHERE company_id = rec.company_id;
+      DELETE FROM public.company_members WHERE company_id = rec.company_id;
+      DELETE FROM public.companies WHERE id = rec.company_id;
+    END IF;
+  END LOOP;
+END;
+$$;