Add Stripe notifications, messaging improvements, and code cleanup

Stripe Notifications:
- Add periodic task to check Stripe Connect accounts for requirements
- Create in-app notifications for business owners when action needed
- Add management command to setup Stripe periodic tasks
- Display Stripe notifications with credit card icon in notification bell
- Navigate to payments page when Stripe notification clicked

Messaging Improvements:
- Add "Everyone" option to broadcast message recipients
- Allow sending messages to yourself (remove self-exclusion)
- Fix broadcast message ID not returned after creation
- Add real-time websocket support for broadcast notifications
- Show toast when broadcast message received via websocket

UI Fixes:
- Remove "View all" button from notifications (no page exists)
- Add StripeNotificationBanner component for Connect alerts
- Connect useUserNotifications hook in TopBar for app-wide websocket

Code Cleanup:
- Remove legacy automations app and plugin system
- Remove safe_scripting module (moved to Activepieces)
- Add migration to remove plugin-related models
- Various test improvements and coverage additions

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/src/pages/Messages.tsx

@@ -181,13 +181,26 @@ const Messages: React.FC = () => {
     },
   });
 
+  // All available target roles (excluding 'everyone' which is a meta-option)
+  const allRoles = ['owner', 'staff', 'customer'];
+
   // Handlers
   const handleRoleToggle = (role: string) => {
-    setSelectedRoles((prev) =>
-      prev.includes(role) ? prev.filter((r) => r !== role) : [...prev, role]
-    );
+    if (role === 'everyone') {
+      // Toggle all roles on/off
+      setSelectedRoles((prev) =>
+        prev.length === allRoles.length ? [] : [...allRoles]
+      );
+    } else {
+      setSelectedRoles((prev) =>
+        prev.includes(role) ? prev.filter((r) => r !== role) : [...prev, role]
+      );
+    }
   };
 
+  // Check if all roles are selected (for "Everyone" tile)
+  const isEveryoneSelected = allRoles.every(role => selectedRoles.includes(role));
+
   const handleAddUser = (user: RecipientOption) => {
     if (!selectedUsers.find(u => u.id === user.id)) {
       setSelectedUsers((prev) => [...prev, user]);
@@ -253,6 +266,7 @@ const Messages: React.FC = () => {
     { value: 'owner', label: 'Owners', icon: Users, description: 'Business owners' },
     { value: 'staff', label: 'Staff', icon: Users, description: 'Employees' },
     { value: 'customer', label: 'Customers', icon: Users, description: 'Clients' },
+    { value: 'everyone', label: 'Everyone', icon: Users, description: 'All users' },
   ];
 
   const deliveryMethodOptions = [
@@ -425,7 +439,7 @@ const Messages: React.FC = () => {
                       label={role.label}
                       icon={role.icon}
                       description={role.description}
-                      selected={selectedRoles.includes(role.value)}
+                      selected={role.value === 'everyone' ? isEveryoneSelected : selectedRoles.includes(role.value)}
                       onClick={() => handleRoleToggle(role.value)}
                     />
                   ))}