fix: Add fix to only allow confirmed agents to used in Agent Assingments at Macros/Automations (#13225)

# Pull Request Template

## Description

Unconfirmed agents (pending email verification) were incorrectly
appearing in the "assign agent" dropdown for macros and automations.
This fix filters out unconfirmed agents from these dropdowns and adds
backend validation to prevent assignment of unconfirmed agents.

Fixes #13223

## Type of change

- [x] Bug fix (non-breaking change which fixes an issue)

## How Has This Been Tested?

**Backend tests:**
```bash
docker compose run --rm rails bundle exec rspec spec/services/action_service_spec.rb
```
- Added tests for confirmed agent assignment (should succeed)
- Added tests for unconfirmed agent assignment (should be skipped)

**Frontend tests:**
```bash
docker compose run --rm rails pnpm test app/javascript/dashboard/composables/spec/useMacros.spec.js
```
- Updated mocks to use `getVerifiedAgents` getter

**Manual testing:**
1. Create an unconfirmed agent via platform
2. Navigate to Settings → Macros → New Macro → Add "Assign Agent" action
3. Verify unconfirmed agent does NOT appear in dropdown
4. Navigate to Settings → Automations → New Automation → Add "Assign
Agent" action
5. Verify unconfirmed agent does NOT appear in dropdown

## Checklist:

- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [ ] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [x] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published in downstream
modules

---------

Co-authored-by: Sojan Jose <sojan@pepalo.com>

app/javascript/dashboard/composables/spec/useAutomation.spec.js

@@ -38,7 +38,7 @@ describe('useAutomation', () => {
     });
     useMapGetter.mockImplementation(getter => {
       const getterMap = {
-        'agents/getAgents': agents,
+        'agents/getVerifiedAgents': agents,
         'campaigns/getAllCampaigns': campaigns,
         'contacts/getContacts': contacts,
         'inboxes/getInboxes': inboxes,

app/javascript/dashboard/composables/spec/useMacros.spec.js

@@ -111,7 +111,7 @@ describe('useMacros', () => {
     useStoreGetters.mockReturnValue({
       'labels/getLabels': { value: mockLabels },
       'teams/getTeams': { value: mockTeams },
-      'agents/getAgents': { value: mockAgents },
+      'agents/getVerifiedAgents': { value: mockAgents },
     });
   });
 
@@ -167,7 +167,7 @@ describe('useMacros', () => {
     useStoreGetters.mockReturnValue({
       'labels/getLabels': { value: [] },
       'teams/getTeams': { value: [] },
-      'agents/getAgents': { value: [] },
+      'agents/getVerifiedAgents': { value: [] },
     });
 
     const { getMacroDropdownValues } = useMacros();

app/javascript/dashboard/composables/useAutomationValues.js

@@ -20,7 +20,7 @@ import {
 export default function useAutomationValues() {
   const getters = useStoreGetters();
   const { t } = useI18n();
-  const agents = useMapGetter('agents/getAgents');
+  const agents = useMapGetter('agents/getVerifiedAgents');
   const campaigns = useMapGetter('campaigns/getAllCampaigns');
   const contacts = useMapGetter('contacts/getContacts');
   const inboxes = useMapGetter('inboxes/getInboxes');

app/javascript/dashboard/composables/useMacros.js

@@ -13,7 +13,7 @@ export const useMacros = () => {
 
   const labels = computed(() => getters['labels/getLabels'].value);
   const teams = computed(() => getters['teams/getTeams'].value);
-  const agents = computed(() => getters['agents/getAgents'].value);
+  const agents = computed(() => getters['agents/getVerifiedAgents'].value);
 
   /**
    * Get dropdown values based on the specified type