Remove empty markdown cell in resource try-it view

[Copilot]

Purpose

Empty markdown cell rendered in HTTP notebook when invoking "Try it" from a resource, showing placeholder text "Empty markdown cell, double-click or press enter to edit."

Goals

Eliminate the empty markdown cell while preserving existing functionality for service-level try-it invocations.

Approach

The Handlebars template conditionally hides method/path headers in resource mode using {{#unless isResourceMode}}, but only wrapped the content, leaving the markdown comment delimiters /* */ to render as an empty cell.

Changed: Moved the conditional to wrap the entire markdown block instead of just its content.

{{#each paths}}
{{#each this}}
-/*
-{{#unless ../../isResourceMode}}#### {{uppercase @key}} {{@../key}}{{/unless}}
+{{#unless ../../isResourceMode}}/*
+#### {{uppercase @key}} {{@../key}}

{{#if parameters}}
  ... parameter docs ...
{{/if}}
*/
+{{/unless}}
###

Before (resource mode):

/*
### Try Resource: 'POST /toxml'
*/

/*

*/  ← Empty markdown cell
###
POST http://localhost:9090/toxml

After (resource mode):

/*
### Try Resource: 'POST /toxml'
*/

###  ← Block removed entirely
POST http://localhost:9090/toxml

Service mode behavior unchanged—method headers still render correctly.

UI Component Development

• N/A - Template change only

Manage Icons

• N/A - No icon changes

User stories

Users invoking "Try it" from a resource no longer see an empty markdown cell disrupting the HTTP notebook layout.

Release note

Fixed empty markdown cell appearing in HTTP notebook when testing individual resources via "Try it" feature.

Documentation

N/A - UI fix with no new user-facing functionality.

Training

N/A

Certification

N/A - Bug fix with no certification impact.

Marketing

N/A

Automation tests

• Unit tests: Template compilation verified with Handlebars
• Integration tests: N/A - UI rendering change

Security checks

• Followed secure coding standards: yes
• Ran FindSecurityBugs plugin: N/A - template string change only
• Confirmed no secrets committed: yes

Samples

N/A

Related PRs

None

Migrations (if applicable)

N/A

Test environment

Node.js with Handlebars 4.x - template compilation verified

Learning

Handlebars conditional block scope—conditionals that only hide content still render surrounding markup. Solution: wrap entire block structure in conditional.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Additional markdown cell rendered in Resource try it</issue_title>
<issue_description>### Description

$subject

Steps to Reproduce

Run Try it from resouce
we could see an additional markdown cell rendered

Version

0.9.825040911

Environment Details (with versions)

No response</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Additional markdown cell rendered in Resource try it product-ballerina-integrator#168

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