feat(notifications): emit at maintenance/turn/sync/reauth events

packages/backend/convex/github.ts

@@ -8,6 +8,7 @@ import {
   query,
 } from './_generated/server';
 import { getRequiredUserId } from './model';
+import { emitNotification } from './notifications';
 
 export const getInstallUrl = query({
   args: {},
@@ -158,6 +159,15 @@ export const setConnectionStatusByInstallation = internalMutation({
     const now = Date.now();
     for (const connection of connections) {
       await ctx.db.patch(connection._id, { status, updatedAt: now });
+      if (status !== 'active') {
+        await emitNotification(ctx, {
+          userId: connection.userId,
+          kind: 'connection_needs_reauth',
+          title: 'GitHub connection needs re-authorization',
+          body: 'Reconnect your GitHub account to keep syncing.',
+          link: '/settings/integrations',
+        });
+      }
     }
 
     return { updated: connections.length };