Add screenshot auth middleware, remove SupportPal references

Screenshot auth: dev-only middleware that authenticates headless Chrome
via ?_screenshot_token= query param. Auto-selects admin/customer user
by subdomain. Only active when APP_ENV=local or explicitly enabled.

SupportPal cleanup: dropped supportpal_ticket_id column, removed env
vars and Phase 7 task tracking. 7 new tests (151 total, 782 assertions).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

TASKS.md

@@ -142,11 +142,6 @@
   - [x] Tax ID
   - [x] Password change
   - [x] 2FA setup (TOTP, passkeys)
-- [ ] SupportPal integration:
-  - [ ] SSO to SupportPal
-  - [ ] View recent tickets widget
-  - [ ] Create ticket button (opens SupportPal or API)
-
 ## Phase 5: Admin Panel (admin.ezscale.cloud)
 - [x] Analytics dashboard:
   - [x] MRR (Monthly Recurring Revenue) graph
@@ -224,31 +219,6 @@
   - [ ] Total bandwidth by service type
   - [ ] Overage revenue report
 
-## Phase 7: SupportPal Integration
-- [ ] Implement SSO for SupportPal:
-  - [ ] Laravel Passport OAuth2 integration
-  - [ ] SupportPal SAML or custom SSO config
-  - [ ] Test seamless login flow
-- [ ] Build SupportPal API integration:
-  - [ ] Fetch user's recent tickets
-  - [ ] Create ticket via API
-  - [ ] Fetch ticket details and replies
-- [ ] Build webhook handlers for SupportPal:
-  - [ ] New ticket created
-  - [ ] Ticket reply added
-  - [ ] Ticket status changed
-  - [ ] Ticket closed
-- [ ] Display tickets in customer dashboard:
-  - [ ] Recent tickets widget
-  - [ ] Link to full ticket in SupportPal
-- [ ] Admin ticket overview:
-  - [ ] Open tickets count
-  - [ ] Tickets by priority
-  - [ ] Link to SupportPal admin
-- [ ] Discord notifications for tickets:
-  - [ ] New ticket opened
-  - [ ] Ticket escalated (high priority)
-
 ## Phase 8: Marketing Frontend (ezscale.cloud)
 - [x] Homepage:
   - [x] Hero section with value proposition
@@ -321,7 +291,7 @@
   - [ ] SynergyCP API integration
   - [ ] Enhance API integration
   - [ ] ElastiFlow API integration
-  - [ ] SupportPal API integration
+
 - [ ] Security testing:
   - [ ] Penetration testing (OWASP Top 10)
   - [ ] Dependency vulnerability scanning