fix: add getTextFromHTML fallback and normalize search key so HTML co… (#41553)

…lumn search works after XSS

## Description
> [!TIP]  
> _Add a TL;DR when the description is longer than 500 words or
extremely technical (helps the content, marketing, and DevRel team)._
>
> _Please also include relevant motivation and context. List any
dependencies that are required for this change. Add links to Notion,
Figma or any other documents that might be relevant to the PR._


Fixes #`Issue Number`  
_or_  
Fixes `Issue URL`
> [!WARNING]  
> _If no issue exists, please create an issue first, and check with the
maintainers if the issue is valid._

## Automation

/ok-to-test tags="@tag.Widget, @tag.Sanity"

### :mag: Cypress test results
<!-- This is an auto-generated comment: Cypress test results  -->
> [!TIP]
> 🟢 🟢 🟢 All cypress tests have passed! 🎉 🎉 🎉
> Workflow run:
<https://github.com/appsmithorg/appsmith/actions/runs/21941468226>
> Commit: 1afcf5447ae1705010beb0ce4cd7f6cad079b63e
> <a
href="https://internal.appsmith.com/app/cypress-dashboard/rundetails-65890b3c81d7400d08fa9ee5?branch=master&workflowId=21941468226&attempt=1"
target="_blank">Cypress dashboard</a>.
> Tags: `@tag.Widget, @tag.Sanity`
> Spec:
> <hr>Thu, 12 Feb 2026 11:26:14 UTC
<!-- end of auto-generated comment: Cypress test results  -->


## Communication
Should the DevRel and Marketing teams inform users about this change?
- [ ] Yes
- [ ] No


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Bug Fixes**
* Enhanced HTML text extraction in table widgets with improved fallback
mechanisms to ensure reliable text recovery and display across all edge
cases
* Strengthened search and filter performance with more robust text
normalization, including safer null and empty value handling, whitespace
trimming, and consistent lowercase conversion for improved filtering
consistency

<!-- end of auto-generated comment: release notes by coderabbit.ai -->