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/api/payments.ts

@@ -543,3 +543,109 @@ export const reactivateSubscription = (subscriptionId: string) =>
   apiClient.post<ReactivateSubscriptionResponse>('/payments/subscriptions/reactivate/', {
     subscription_id: subscriptionId,
   });
+
+// ============================================================================
+// Stripe Settings (Connect Accounts)
+// ============================================================================
+
+export type PayoutInterval = 'daily' | 'weekly' | 'monthly' | 'manual';
+export type WeeklyAnchor = 'monday' | 'tuesday' | 'wednesday' | 'thursday' | 'friday' | 'saturday' | 'sunday';
+
+export interface PayoutSchedule {
+  interval: PayoutInterval;
+  delay_days: number;
+  weekly_anchor: WeeklyAnchor | null;
+  monthly_anchor: number | null;
+}
+
+export interface PayoutSettings {
+  schedule: PayoutSchedule;
+  statement_descriptor: string;
+}
+
+export interface BusinessProfile {
+  name: string;
+  support_email: string;
+  support_phone: string;
+  support_url: string;
+}
+
+export interface BrandingSettings {
+  primary_color: string;
+  secondary_color: string;
+  icon: string;
+  logo: string;
+}
+
+export interface BankAccount {
+  id: string;
+  bank_name: string;
+  last4: string;
+  currency: string;
+  default_for_currency: boolean;
+  status: string;
+}
+
+export interface StripeSettings {
+  payouts: PayoutSettings;
+  business_profile: BusinessProfile;
+  branding: BrandingSettings;
+  bank_accounts: BankAccount[];
+}
+
+export interface StripeSettingsUpdatePayouts {
+  schedule?: Partial<PayoutSchedule>;
+  statement_descriptor?: string;
+}
+
+export interface StripeSettingsUpdate {
+  payouts?: StripeSettingsUpdatePayouts;
+  business_profile?: Partial<BusinessProfile>;
+  branding?: Pick<BrandingSettings, 'primary_color' | 'secondary_color'>;
+}
+
+export interface StripeSettingsUpdateResponse {
+  success: boolean;
+  message: string;
+}
+
+export interface StripeSettingsErrorResponse {
+  errors: Record<string, string>;
+}
+
+/**
+ * Get Stripe account settings for Connect accounts.
+ * Includes payout schedule, business profile, branding, and bank accounts.
+ */
+export const getStripeSettings = () =>
+  apiClient.get<StripeSettings>('/payments/settings/');
+
+/**
+ * Update Stripe account settings.
+ * Can update payout settings, business profile, or branding.
+ */
+export const updateStripeSettings = (updates: StripeSettingsUpdate) =>
+  apiClient.patch<StripeSettingsUpdateResponse>('/payments/settings/', updates);
+
+// ============================================================================
+// Connect Login Link
+// ============================================================================
+
+export interface LoginLinkRequest {
+  return_url?: string;
+  refresh_url?: string;
+}
+
+export interface LoginLinkResponse {
+  url: string;
+  type: 'login_link' | 'account_link';
+  expires_at?: number;
+}
+
+/**
+ * Create a dashboard link for the Connect account.
+ * For Express accounts: Returns a one-time login link.
+ * For Custom accounts: Returns an account link (requires return/refresh URLs).
+ */
+export const createConnectLoginLink = (request?: LoginLinkRequest) =>
+  apiClient.post<LoginLinkResponse>('/payments/connect/login-link/', request || {});