Fix public email override task links

docs/PUBLIC_TASK_EMAIL_OVERRIDE.md

@@ -68,12 +68,6 @@ POST /api/tasks/public  (controller: email pulled off the parsed DTO)
 
 The merge (`{ ...default, ...override }`) is why omitted fields fall back to the default copy.
 
-The merged `email` is what gets buffered as `GroupedEmailEvent.individualEmail` during the
-5-minute grouping window, so the override is preserved through the grouped-email pipeline.
-
-## Known limitation
-
-Task-assignment emails are buffered for ~5 minutes and grouped per recipient (see the grouped
-email flow). The override is replayed **verbatim** only when the recipient has a **single**
-buffered event in that window. If multiple events group into one summary email, that summary
-uses the default grouped copy and the override is **not** applied.
+When an override is provided, the email bypasses the 5-minute grouped-email buffer and is sent
+as an individual task email. That keeps the custom copy and CTA tied to the task that was just
+created.

src/app/api/notification/notification.service.test.ts

@@ -146,6 +146,28 @@ describe('NotificationService grouped-email interception', () => {
       expect(mockEnqueueFlush).not.toHaveBeenCalled()
     })
 
+    it('sends email overrides immediately so their task CTA is not grouped away', async () => {
+      const task = makeTask()
+
+      await buildService().create(NotificationTaskActions.Assigned, task, {
+        disableEmail: false,
+        emailOverride: {
+          subject: 'Action Required: Evaluation Ready',
+          title: 'Review evaluation',
+        },
+      })
+
+      expect(mockGroupedCreateMany).not.toHaveBeenCalled()
+      expect(mockEnqueueFlush).not.toHaveBeenCalled()
+      expect(mockCreateNotification).toHaveBeenCalledTimes(1)
+      expect(deliveryTargetsOf(0).inProduct).toBeDefined()
+      expect(deliveryTargetsOf(0).email).toMatchObject({
+        subject: 'Action Required: Evaluation Ready',
+        title: 'Review evaluation',
+        ctaParams: { taskId: task.id },
+      })
+    })
+
     it('keys the window on (clientId, companyId) so a multi-company client does not get merged', async () => {
       const companyB = '99999999-9999-9999-9999-999999999999'
       await buildService().create(NotificationTaskActions.Assigned, makeTask({ companyId: companyB }))
@@ -251,6 +273,30 @@ describe('NotificationService grouped-email interception', () => {
       expect(recipients).toEqual(['cu_a', 'cu_b', 'cu_c'])
     })
 
+    it('sends bulk email overrides immediately for every recipient', async () => {
+      const task = makeTask()
+      const recipients = ['33333333-3333-3333-3333-333333333333', '44444444-4444-4444-4444-444444444444']
+
+      await buildService().createBulkNotification(NotificationTaskActions.AssignedToCompany, task, recipients, {
+        email: true,
+        emailOverride: {
+          subject: 'Action Required: Evaluation Ready',
+          title: 'Review evaluation',
+        },
+      })
+
+      expect(mockGroupedCreateMany).not.toHaveBeenCalled()
+      expect(mockEnqueueFlush).not.toHaveBeenCalled()
+      expect(mockCreateNotification).toHaveBeenCalledTimes(2)
+      for (const call of mockCreateNotification.mock.calls) {
+        expect(call[0].deliveryTargets.email).toMatchObject({
+          subject: 'Action Required: Evaluation Ready',
+          title: 'Review evaluation',
+          ctaParams: { taskId: task.id },
+        })
+      }
+    })
+
     it('falls back to the association company when the shared task has no companyId', async () => {
       const assocCompany = '88888888-8888-8888-8888-888888888888'
       const task = makeTask({

src/app/api/notification/notification.service.ts

@@ -64,7 +64,7 @@ export class NotificationService extends BaseService {
       const email = baseEmail ? mergeEmailOverride({ base: baseEmail, override: opts.emailOverride }) : baseEmail
 
       // Non-null only when this CU email should be diverted into the grouped buffer.
-      const groupedType = email && recipientId ? this.groupedEventTypeFor(action) : null
+      const groupedType = email && recipientId && !opts.emailOverride ? this.groupedEventTypeFor(action) : null
       if (groupedType) {
         const association = AssociationsSchema.parse(task.associations)?.[0]
         await this.bufferGroupedEmailEvent({
@@ -178,7 +178,7 @@ export class NotificationService extends BaseService {
 
       const association = AssociationsSchema.parse(task.associations)?.[0]
       // Non-null only when these CU emails should be diverted into the grouped buffer.
-      const groupedType = email ? this.groupedEventTypeFor(action) : null
+      const groupedType = email && !opts?.emailOverride ? this.groupedEventTypeFor(action) : null
 
       // NOTE: The reason we are skipping using NotificationService#create and implementing notification dispatch + save manually is because
       // we can just do one `createMany` DB call instead of one per notification, saving a ton of DB calls