feat: Update Captain navigation structure (#12761)

# Pull Request Template

## Description

This PR includes an update to the Captain navigation structure.

## Route Structure

```javascript
1. captain_assistants_responses_index    → /captain/:assistantId/faqs
2. captain_assistants_documents_index    → /captain/:assistantId/documents
3. captain_assistants_scenarios_index    → /captain/:assistantId/scenarios
4. captain_assistants_playground_index   → /captain/:assistantId/playground
5. captain_assistants_inboxes_index      → /captain/:assistantId/inboxes
6. captain_tools_index                   → /captain/tools
7. captain_assistants_settings_index     → /captain/:assistantId/settings
8. captain_assistants_guardrails_index   → /captain/:assistantId/settings/guardrails
9. captain_assistants_guidelines_index   → /captain/:assistantId/settings/guidelines
10. captain_assistants_index             → /captain/:navigationPath
```

**How it works:**

1. User clicks sidebar item → Routes to `captain_assistants_index` with
`navigationPath`
2. `AssistantsIndexPage` validates route and gets last active assistant,
if not redirects to assistant create page.
3. Routes to actual page: `/captain/:assistantId/:page`
4. Page loads with correct assistant context

Fixes
https://linear.app/chatwoot/issue/CW-5832/updating-captain-navigation

## Type of change

- [x] New feature (non-breaking change which adds functionality)

## How Has This Been Tested?




## 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
- [ ] 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: Pranav <pranav@chatwoot.com>
Co-authored-by: Sojan Jose <sojan@pepalo.com>

app/javascript/dashboard/components-next/sidebar/Sidebar.vue

@@ -221,26 +221,70 @@ const menuItems = computed(() => {
       name: 'Captain',
       icon: 'i-woot-captain',
       label: t('SIDEBAR.CAPTAIN'),
+      activeOn: ['captain_assistants_create_index'],
       children: [
         {
-          name: 'Assistants',
-          label: t('SIDEBAR.CAPTAIN_ASSISTANTS'),
-          to: accountScopedRoute('captain_assistants_index'),
+          name: 'FAQs',
+          label: t('SIDEBAR.CAPTAIN_RESPONSES'),
+          activeOn: [
+            'captain_assistants_responses_index',
+            'captain_assistants_responses_pending',
+          ],
+          to: accountScopedRoute('captain_assistants_index', {
+            navigationPath: 'captain_assistants_responses_index',
+          }),
         },
         {
           name: 'Documents',
           label: t('SIDEBAR.CAPTAIN_DOCUMENTS'),
-          to: accountScopedRoute('captain_documents_index'),
+          activeOn: ['captain_assistants_documents_index'],
+          to: accountScopedRoute('captain_assistants_index', {
+            navigationPath: 'captain_assistants_documents_index',
+          }),
         },
         {
-          name: 'Responses',
-          label: t('SIDEBAR.CAPTAIN_RESPONSES'),
-          to: accountScopedRoute('captain_responses_index'),
+          name: 'Scenarios',
+          label: t('SIDEBAR.CAPTAIN_SCENARIOS'),
+          activeOn: ['captain_assistants_scenarios_index'],
+          to: accountScopedRoute('captain_assistants_index', {
+            navigationPath: 'captain_assistants_scenarios_index',
+          }),
+        },
+        {
+          name: 'Playground',
+          label: t('SIDEBAR.CAPTAIN_PLAYGROUND'),
+          activeOn: ['captain_assistants_playground_index'],
+          to: accountScopedRoute('captain_assistants_index', {
+            navigationPath: 'captain_assistants_playground_index',
+          }),
+        },
+        {
+          name: 'Inboxes',
+          label: t('SIDEBAR.CAPTAIN_INBOXES'),
+          activeOn: ['captain_assistants_inboxes_index'],
+          to: accountScopedRoute('captain_assistants_index', {
+            navigationPath: 'captain_assistants_inboxes_index',
+          }),
         },
         {
           name: 'Tools',
           label: t('SIDEBAR.CAPTAIN_TOOLS'),
-          to: accountScopedRoute('captain_tools_index'),
+          activeOn: ['captain_tools_index'],
+          to: accountScopedRoute('captain_assistants_index', {
+            navigationPath: 'captain_tools_index',
+          }),
+        },
+        {
+          name: 'Settings',
+          label: t('SIDEBAR.CAPTAIN_SETTINGS'),
+          activeOn: [
+            'captain_assistants_settings_index',
+            'captain_assistants_guidelines_index',
+            'captain_assistants_guardrails_index',
+          ],
+          to: accountScopedRoute('captain_assistants_index', {
+            navigationPath: 'captain_assistants_settings_index',
+          }),
         },
       ],
     },