feat: UI changes for document auto sync [AI-153] (#14258)

# Pull Request Template

## Description

FE code for document sync

Adds:
- UI to show counts (stats) of available web pages, stale and synced
documents and last synced at
- Bulk action and manual ways to sync web documents
- index to stats related columns

## Type of change

Please delete options that are not relevant.

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

## How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide
instructions so we can reproduce. Please also list any relevant details
for your test configuration.

https://linear.app/chatwoot/issue/AI-153/fe-document-auto-sync

Documents dashboard:
<img width="2160" height="986" alt="CleanShot 2026-05-11 at 17 57 09@2x"
src="https://github.com/user-attachments/assets/6d934764-964c-4656-b005-1b4f0329e553"
/>

Filters:
<img width="1138" height="564" alt="CleanShot 2026-05-11 at 17 58 13@2x"
src="https://github.com/user-attachments/assets/cee780e6-eb8f-4aed-8cc5-b674244a821b"
/>

Needs update:
<img width="2222" height="966" alt="CleanShot 2026-05-11 at 17 57 53@2x"
src="https://github.com/user-attachments/assets/70c85ddd-7eb1-4328-ba14-7929e67e7b36"
/>

pdfs:
<img width="2180" height="558" alt="CleanShot 2026-05-11 at 17 58 30@2x"
src="https://github.com/user-attachments/assets/975b5c9f-bd1c-4979-9870-8f926d7f6e11"
/>

bulk actions:
<img width="2244" height="992" alt="CleanShot 2026-05-11 at 17 58 57@2x"
src="https://github.com/user-attachments/assets/bdb3c63f-d2de-41dc-a6d5-8821d3303be0"
/>

single url sync:
<img width="2264" height="722" alt="CleanShot 2026-05-11 at 17 59 19@2x"
src="https://github.com/user-attachments/assets/7d7323a5-0fcb-4be9-8635-55e56964999b"
/>



## Checklist:

- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [x] 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
- [x] Any dependent changes have been merged and published in downstream
modules

---------

Co-authored-by: Sivin Varghese <64252451+iamsivin@users.noreply.github.com>
Co-authored-by: iamsivin <iamsivin@gmail.com>
Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>
Co-authored-by: Sony Mathew <sony@chatwoot.com>
Co-authored-by: Vishnu Narayanan <iamwishnu@gmail.com>

app/javascript/dashboard/i18n/locale/en/integrations.json

@@ -742,6 +742,7 @@
       "SELECT_ALL": "Select all ({count})",
       "UNSELECT_ALL": "Unselect all ({count})",
       "BULK_DELETE_BUTTON": "Delete",
+      "BULK_SYNC_BUTTON": "Refresh",
       "BULK_DELETE": {
         "TITLE": "Delete documents?",
         "DESCRIPTION": "Are you sure you want to delete the selected documents? This action cannot be undone.",
@@ -749,6 +750,51 @@
         "SUCCESS_MESSAGE": "Documents deleted successfully",
         "ERROR_MESSAGE": "There was an error deleting the documents, please try again."
       },
+      "BULK_SYNC": {
+        "SUCCESS_MESSAGE_ONE": "Refresh queued for 1 document",
+        "SUCCESS_MESSAGE": "Refresh queued for {count} documents",
+        "ZERO_MESSAGE": "No documents marked for refresh.",
+        "ERROR_MESSAGE": "There was an error queuing the refresh, please try again."
+      },
+      "SYNC": {
+        "QUEUED_MESSAGE": "Refresh queued. We'll update the document shortly.",
+        "ERROR_MESSAGE": "Could not queue refresh, please try again."
+      },
+      "FILTERS": {
+        "SOURCE": {
+          "ALL": "All sources",
+          "WEB": "Web pages",
+          "PDF": "PDFs"
+        },
+        "STATUS": {
+          "ANY": "Any status",
+          "UPDATED": "Updated",
+          "NEEDS_UPDATE": "Needs update",
+          "UPDATING": "Updating",
+          "FAILED": "Failed"
+        },
+        "SORT": {
+          "RECENTLY_UPDATED": "Recently updated",
+          "RECENTLY_CREATED": "Recently created"
+        },
+        "SEARCH_PLACEHOLDER": "Search..."
+      },
+      "SYNC_STATUS": {
+        "SYNCED": "last updated {time}",
+        "SYNCING": "updating...",
+        "STALE_SYNC": "update stalled",
+        "FAILED": "Failed to sync",
+        "NEVER_SYNCED": "not updated yet"
+      },
+      "SYNC_ERRORS": {
+        "NOT_FOUND": "Page not found",
+        "ACCESS_DENIED": "Access denied",
+        "TIMEOUT": "Page took too long to respond",
+        "CONTENT_EMPTY": "Page returned empty content",
+        "FETCH_FAILED": "Could not fetch page",
+        "SYNC_ERROR": "Unexpected error",
+        "DEFAULT": "Sync error"
+      },
       "RELATED_RESPONSES": {
         "TITLE": "Related FAQs",
         "DESCRIPTION": "These FAQs are generated directly from the document."
@@ -793,11 +839,15 @@
 
       "OPTIONS": {
         "VIEW_RELATED_RESPONSES": "View Related Responses",
+        "SYNC_NOW": "Refresh now",
+        "RETRY_SYNC": "Retry refresh",
         "DELETE_DOCUMENT": "Delete Document"
       },
       "EMPTY_STATE": {
         "TITLE": "No documents available",
         "SUBTITLE": "Documents are used by your assistant to generate FAQs. You can import documents to provide context for your assistant.",
+        "FILTERED_TITLE": "No matching documents",
+        "FILTERED_SUBTITLE": "Try changing the source, status, or search term.",
         "FEATURE_SPOTLIGHT": {
           "TITLE": "Captain Document",
           "NOTE": "A document in Captain serves as a knowledge resource for the assistant. By connecting your help center or guides, Captain can analyze the content and provide accurate responses for customer inquiries."