feat(notifications): add notifications + notificationPreferences tables

packages/backend/convex/schema.ts

@@ -835,6 +835,37 @@ const applicationTables = {
   })
     .index('by_thread', ['threadId'])
     .index('by_owner', ['ownerId']),
+  notifications: defineTable({
+    userId: v.id('users'),
+    kind: v.union(
+      v.literal('maintenance_thread'),
+      v.literal('agent_turn_finished'),
+      v.literal('agent_needs_input'),
+      v.literal('sync_failed'),
+      v.literal('connection_needs_reauth'),
+    ),
+    title: v.string(),
+    body: v.string(),
+    link: v.optional(v.string()),
+    spoonId: v.optional(v.id('spoons')),
+    threadId: v.optional(v.id('threads')),
+    readAt: v.optional(v.number()),
+    emailedAt: v.optional(v.number()),
+    createdAt: v.number(),
+  })
+    .index('by_user', ['userId'])
+    .index('by_user_unread', ['userId', 'readAt'])
+    .index('by_user_created', ['userId', 'createdAt']),
+  notificationPreferences: defineTable({
+    userId: v.id('users'),
+    emailEnabled: v.optional(v.boolean()),
+    emailMaintenance: v.optional(v.boolean()),
+    emailAgentTurnFinished: v.optional(v.boolean()),
+    emailAgentNeedsInput: v.optional(v.boolean()),
+    emailSyncFailed: v.optional(v.boolean()),
+    emailConnectionReauth: v.optional(v.boolean()),
+    updatedAt: v.number(),
+  }).index('by_user', ['userId']),
   ignoredUpstreamChanges: defineTable({
     spoonId: v.id('spoons'),
     ownerId: v.id('users'),