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/i18n/locales/en.json

@@ -1851,6 +1851,71 @@
       "cancel": "Cancel",
       "validationFailed": "Validation failed",
       "failedToSaveKeys": "Failed to save keys"
+    },
+    "stripeSettings": {
+      "title": "Stripe Account Settings",
+      "description": "Configure your Stripe Connect account settings including payout schedule, business profile, and branding.",
+      "loading": "Loading settings...",
+      "loadError": "Failed to load settings",
+      "unknownError": "An unknown error occurred",
+      "saveError": "Failed to save settings",
+      "savedSuccessfully": "Settings saved successfully",
+      "stripeDashboard": "Stripe Dashboard",
+      "payouts": "Payouts",
+      "businessProfile": "Business Profile",
+      "branding": "Branding",
+      "bankAccounts": "Bank Accounts",
+      "payoutsDescription": "Configure when and how your payouts are sent to your bank account. Changes take effect immediately.",
+      "payoutSchedule": "Payout Schedule",
+      "payoutInterval": "Payout Frequency",
+      "intervalDaily": "Daily",
+      "intervalWeekly": "Weekly",
+      "intervalMonthly": "Monthly",
+      "intervalManual": "Manual",
+      "intervalHint": "How often funds are transferred to your bank account",
+      "delayDays": "Payout Delay",
+      "days": "days",
+      "delayDaysHint": "Number of days to hold funds before payout (2-14 days)",
+      "weeklyAnchor": "Payout Day",
+      "monthlyAnchor": "Day of Month",
+      "dayOfMonth": "Day {{day}}",
+      "monday": "Monday",
+      "tuesday": "Tuesday",
+      "wednesday": "Wednesday",
+      "thursday": "Thursday",
+      "friday": "Friday",
+      "saturday": "Saturday",
+      "sunday": "Sunday",
+      "statementDescriptor": "Statement Descriptor",
+      "descriptorLabel": "Statement Descriptor",
+      "descriptorPlaceholder": "Your Business Name",
+      "descriptorHint": "This appears on customer bank statements",
+      "descriptorTooLong": "Statement descriptor must be 22 characters or less",
+      "descriptorInvalidChars": "Only letters, numbers, spaces, hyphens, and periods are allowed",
+      "businessProfileDescription": "Update your business contact information. This appears on receipts and is used by Stripe for customer support purposes.",
+      "businessName": "Business Name",
+      "supportEmail": "Support Email",
+      "supportEmailHint": "Email address customers can use for payment-related inquiries",
+      "supportPhone": "Support Phone",
+      "supportUrl": "Support URL",
+      "supportUrlHint": "URL to your customer support or help page",
+      "brandingDescription": "Customize how your brand appears on Stripe-hosted pages like receipts and checkout.",
+      "primaryColor": "Primary Color",
+      "secondaryColor": "Secondary Color",
+      "invalidColorFormat": "Invalid color format. Use #RGB or #RRGGBB format.",
+      "logoAndIcon": "Logo & Icon",
+      "logoAndIconDescription": "To upload or update your logo and icon, use the Stripe Dashboard.",
+      "uploadInStripeDashboard": "Upload in Stripe Dashboard",
+      "icon": "Icon",
+      "logo": "Logo",
+      "bankAccountsDescription": "View your connected bank accounts. To add or remove bank accounts, use the Stripe Dashboard for security reasons.",
+      "noBankAccounts": "No Bank Accounts",
+      "noBankAccountsDescription": "Add a bank account in the Stripe Dashboard to receive payouts.",
+      "addInStripeDashboard": "Add Bank Account",
+      "bankAccount": "Bank Account",
+      "default": "Default",
+      "manageInStripeDashboard": "Manage bank accounts in Stripe Dashboard",
+      "loginLinkError": "Unable to open Stripe Dashboard. Please try again."
     }
   },
   "settings": {