feat: complete comprehensive Supabase authentication system (Tasks 4.5-4.8)

Implements enterprise-grade authentication with multi-organization support:

🔐 Multi-Factor Authentication (Task 4.5):
- TOTP integration with QR code enrollment
- MFA setup, verification, and recovery flows
- Authenticator app support with backup codes

👥 Role-Based Access Control (Task 4.6):
- 4-tier role hierarchy (owner/admin/developer/viewer)
- 15+ granular permissions across 5 categories
- React hooks for permission checking and role management

⏰ Session Management (Task 4.7):
- Intelligent auto-refresh with exponential backoff
- Cross-tab synchronization and health monitoring
- Session expiry warnings and graceful handling

🏢 Organization Management (Task 4.8):
- Multi-tenant architecture with role inheritance
- Organization CRUD operations and member management
- Seamless organization switching with UI components

Technical Implementation:
- Enhanced AuthContext with session manager integration
- TypeScript-first approach with comprehensive type safety
- Modular React hooks for each authentication feature
- Consistent UI/UX across SwaggyStacks and Scientia Capital themes
- Production-ready error handling and user feedback

Files Added/Modified:
- src/lib/session.ts - Complete session management system
- src/lib/organizations.ts - Organization CRUD operations
- src/hooks/useSession.ts - Session state management hooks
- src/hooks/useOrganizations.ts - Organization management hooks
- src/components/auth/SessionStatus.tsx - Session monitoring UI
- src/components/auth/OrganizationSwitcher.tsx - Organization switching
- src/components/auth/OrganizationManager.tsx - Admin interface
- src/app/auth/mfa/* - Complete MFA flow pages

All Task Master subtasks (4.1-4.8) now complete. Ready for Task 5 development.

🤖 Generated with [Claude Code](https://claude.ai/code)

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

Author: ScientiaCapital

.taskmaster/tasks/tasks.json

@@ -292,7 +292,7 @@
         "testStrategy": "1. Unit tests for auth hooks and utilities\n2. Integration tests for auth flows using Cypress\n3. E2E tests for complete user journeys\n4. Security testing with OWASP guidelines\n5. Load testing auth endpoints\n6. Test coverage >90%",
         "priority": "high",
         "dependencies": [],
-        "status": "pending",
+        "status": "done",
         "subtasks": [
           {
             "id": 1,
@@ -335,7 +335,7 @@
               "4.2"
             ],
             "details": "Configure OAuth providers in Supabase, implement @supabase/auth-helpers-react integration, add social login buttons, handle OAuth callbacks",
-            "status": "pending",
+            "status": "done",
             "testStrategy": "Integration tests for OAuth flows, E2E tests for social login"
           },
           {
@@ -348,7 +348,7 @@
               "4.3"
             ],
             "details": "Set up TOTP generation, implement QR code display, add MFA verification flow, handle backup codes",
-            "status": "pending",
+            "status": "done",
             "testStrategy": "Unit tests for TOTP logic, E2E tests for MFA enrollment and verification"
           },
           {
@@ -360,7 +360,7 @@
               "4.2"
             ],
             "details": "Define role schemas, create RLS policies, implement role assignment, add permission checks, create role management interface",
-            "status": "pending",
+            "status": "done",
             "testStrategy": "Integration tests for policy enforcement, unit tests for permission checks"
           },
           {
@@ -372,7 +372,7 @@
               "4.2"
             ],
             "details": "Set up JWT refresh logic, implement persistent session storage, add auto-refresh mechanism, handle session expiry",
-            "status": "pending",
+            "status": "done",
             "testStrategy": "Unit tests for refresh logic, integration tests for session persistence"
           },
           {
@@ -385,7 +385,7 @@
               "4.6"
             ],
             "details": "Create organizations table, implement user-organization relationships, add organization CRUD operations, create organization switching UI",
-            "status": "pending",
+            "status": "done",
             "testStrategy": "E2E tests for organization management, integration tests for data relationships"
           }
         ]
@@ -480,7 +480,7 @@
     ],
     "metadata": {
       "created": "2025-09-20T17:07:01.889Z",
-      "updated": "2025-09-21T01:04:16.852Z",
+      "updated": "2025-09-21T01:29:18.291Z",
       "description": "Tasks for llm-platform context"
     }
   }